All Wiring Diagrams for GMC Suburban C1999 2500 model

AIR CONDITIONING

6.5L

6.5L VIN F, Compressor Wiring Diagram for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Compressor Wiring Diagram for GMC Suburban C1999 2500:

• (engine harn, near diode)
• 30 cm from ebcm breakout)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay (in underhood fuse/relay center)
• A/c compressor cycling switch (in low pressure line, on accumulator)
• A/c control
• A/c disable
• A/c enable
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on a/c compressor)
• A/c switch
• Blower switch
• Diode
• Fuse block
• G105 (right side of engine)
• Hot in run
• Hot in run or start
• Htr a/c fuse 12 25a
• Hvac control module
• Ign 1 fuse 10a
• Ignition
• Off
• Pnk
• Powertrain control module (behind right side of dash)
• Recirc signal
• Recirculation door motor (on a/c-heater housing)
• S185
• S186
• S268 (i/p harn, behind center of dash)
• Underhood fuse block

6.5L VIN F, Manual A/C Wiring Diagram for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram for GMC Suburban C1999 2500:

• (behind right
• (engine harn,
• (engine harn, near diode)
• (engine harness, near ebcm breakout)
• (hvac harness, 4 cm from recirc door breakout)
• (hvac harness, 8 cm from recirc door breakout)
• (i/p harn, 24 cm from cluster breakout)
• (i/p harness, behind center of dash)
• (right side of dash) g202
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay (in underhood fuse center)
• A/c compressor cycling switch (in low pressure line, on accumulator)
• A/c ctrl
• A/c disable
• A/c enable
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on a/c compressor)
• A/c switch
• Air temp dr signal
• Battery
• Block
• Blower fuse 3 50a
• Blower motor
• Blower resistor (under right side of dash, on heater housing)
• Blower switch
• Defogger element
• Diode
• Front mode door motor (on front a/c-heater housing)
• Front temperature door motor (on front a/c-heater housing)
• Fuse
• Fuse block
• G105 (right side of engine)
• G200 (behind left side of dash)
• Ground
• Heater and a/c control module
• High blower relay (under dash on top of heater-a/c housing)
• Hot at all times
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 25a
• Ign e fuse 10a
• Ignition
• Illumination
• Interior lights system
• Mode signal
• Near diode)
• Off
• Pnk
• Powertrain control module
• Rear defogger system
• Recirc signal
• Recirculation door motor (under dash on heater- a/c housing)
• Red
• S107 (engine harn, 30 cm from breakout to ebcm)
• S110
• S185
• S186
• S212 (i/p harn, behind center of dash)
• S243
• S244
• S268
• S298
• Side of dash)
• Tan
• Underhood

6.5L VIN F, Manual A/C Wiring Diagram, Auxiliary (1 of 2) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Auxiliary (1 of 2) for GMC Suburban C1999 2500:

• (hvac harn, 8 cm from recirc door breakout) s244
• (i/p harn, 24 cm from i/p cluster breakout)
• A/c compressor clutch
• A/c compressor clutch diode
• A/c compressor clutch relay (in underhood fuse/relay center)
• A/c compressor cycling switch (on top of accumulator)
• A/c compressor high pressure cutout switch (rear of the a/c compressor)
• A/c compressor low pressure cutout switch (on top of a/c compressor)
• A/c disable
• A/c fuse 10a
• A/c request
• Air temp dr sensor
• Aux fan fuse 30a
• Auxiliary cooling fan motor
• Auxiliary cooling fan relay (in underhood fuse/relay center)
• Battery
• Blower fuse 3 50a
• Blower motor (under right side of dash)
• Blower resistor (on blower motor housing)
• Blower switch
• C 1995 vftc
• Defogger element
• Front mode door motor (on front a/c-heater housing)
• Front temperature door motor (on front a/c-heater housing)
• G105 (right front of engine block)
• G112 (right front of engine compt)
• G200 (behind left side of dash)
• G202 (right side of dash)
• Ground
• High blower relay (on top of front a/c- heater blower housing)
• Hot at all times
• Hot in run
• Htr-a/c fuse 12 25a
• Hvac control module
• I/p fuse block
• Ign e fuse 10a
• Ignition
• Illumination
• Interior lights system
• Mode signal
• Off
• Pnk
• Rear defogger system
• Recirc ctrl
• Recirculation door motor (on front a/c-heater housing)
• Red
• Relay control
• S110 (engine harness, near ebcm breakout)
• S185 (in harness near diode)
• S186 (in harness near diode)
• S212 (dash harn, 8 cm from airbag switch breakout)
• S243 (hvac harn, 4 cm from recirc door breakout)
• S298
• Switch signal
• Tan
• Underhood fuse block
• Vehicle control module (on left side of engine compartment)

6.5L VIN F, Manual A/C Wiring Diagram, Auxiliary (2 of 2) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Auxiliary (2 of 2) for GMC Suburban C1999 2500:

• (in front of overhead console) auxiliary a/c & heater control module (front)
• (taillamp ext harn, near g404 breakout)
• A red
• Auxiliary a/c & heater control module (rear) (behind left side of dash)
• Auxiliary a/c & heater logic module (behind left side of dash)
• Auxiliary blower motor (behind right rear wheelwell)
• Auxiliary blower motor relay (high) (on auxiliary a/c-heater blower housing, right rear of vehicle)
• Auxiliary blower motor relay (low) (on auxiliary a/c-heater blower housing, right rear of vehicle)
• Auxiliary blower motor relay (medium) (on auxiliary a/c-heater blower housing, right rear of vehicle)
• Auxiliary blower resistor (on top of auxiliary hvac plenum)
• C 1995 vftc
• Convenience center
• G400 (on right side "b" pillar)
• Ground
• High
• Hot in run
• I/p fuse block
• Low
• Med
• Mode
• Mode door motor (rear) (on rear a/c housing)
• Off
• Rear
• Red
• Red e
• Rr hvac/ fuse 5 10a
• S305 (auxiliary hvac harn, near rear auxiliary hvac control module)
• S306 (auxiliary hvac harn, near rear auxiliary hvac control module)
• S324
• S400 (auxiliary hvac harn, near auxiliary blower motor relays)
• S401 red (auxiliary hvac harn, near auxiliary blower motor relays)
• Signal
• Temp
• Temp door motor (rear) (on rear a/c housing)

ANTI-LOCK BRAKES

5.7L

5.7L VIN R, Anti-lock Brake Wiring Diagrams for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Anti-lock Brake Wiring Diagrams for GMC Suburban C1999 2500:

• 4wd sw input
• Abs fuse 60a
• Abs ind
• Abs ind ground
• Battery
• Brake fuse 18 10a
• Brake ind
• Brake ind input
• Brake lamp ind out
• Brake pressure warning switch (underside of ebcm)
• Brake sw input
• Brake sw output
• Cruise control system
• Data link connector (left of steering column)
• Daytime running lamps module (behind left side of dash)
• Ebcm ground
• Electronic brake control module (left side of engine compt)
• Engine control system
• Evo/ passlock control module (under center of dash)
• Front axle actuator (right front of front axle)
• G119 (right front of engine)
• Gauges fuse 4 10a
• Hot at all times
• Hot in run
• Hot in run and start
• I/p fuse block (under left side of dash)
• Ignition
• Instrument cluster
• Left front wheel speed sensor
• M/t only
• Pnk
• Pump motor ground
• Red
• Right front wheel speed sensor
• S147
• S150 (engine harn, approx 13 cm from ebcm breakout)
• S151
• S152 (engine harness, near ebcm breakout)
• S213
• S280 (i/p harn, approx 5 cm from dlc breakout)
• Sensor high
• Sensor low
• Serial data
• Serial data line
• Stoplamp switch (top of brake pedal)
• Tan
• Transfer case shift control module (on steering column support bracket)
• Underhood fuse/relay center (left rear of engine compt)
• Vehicle control module (left side of engine compt)
• Vehicle speed sensor (left side of transmission/ transfer case)
• Vehicle speed sig
• Vss (+)
• Vss (-)
• Vss sig

6.5L

6.5L VIN F, Anti-lock Brake Wiring Diagrams for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Anti-lock Brake Wiring Diagrams for GMC Suburban C1999 2500:

• (engine harn, approx 40-50 cm before ebcm harn breakout) s157
• 4wd sw input
• Abs fuse 60a
• Abs ind
• Abs ind ground
• Battery
• Brake fuse 18 10a
• Brake ind
• Brake ind input
• Brake pressure warning switch (underside of ebcm)
• Brake sw input
• Cruise control system
• Data link connector (left of steering column)
• Daytime running lamps module (behind left side of dash)
• Diagnostic signal
• Diode 1
• Ebcm ground
• Electronic brake control module (left side of engine compt)
• Engine control system
• Evo/ passlock control module (under center of dash)
• Front axle actuator (right front of front axle)
• G117 (right rear of engine)
• Gauges fuse 4 10a
• Hot at all times
• Hot in run
• Hot in run and start
• I/p fuse block (under left side of dash)
• Ignition
• Instrument cluster
• Left front wheel speed sensor
• M/t only
• Pnk
• Powertrain control module (behind right side side of dash, near blower motor)
• Pump motor ground
• Red
• Right front wheel speed sensor
• S107
• S150 (engine harn, approx 13 cm from ebcm breakout)
• S151
• S152 (engine harness, near ebcm breakout)
• S213
• S280 (i/p harn, approx 5 cm from dlc breakout)
• Sensor high
• Sensor low
• Serial data
• Stoplamp switch (top of brake pedal)
• Tan
• Transfer case shift control module (on steering column support bracket)
• Underhood fuse/relay center (left rear of engine compt)
• Vehicle speed sensor (left side of transmission/ transfer case)
• Vehicle speed sensor buffer (behind right side of dash)
• Vss sig

ANTI-THEFT

Passlock Wiring Diagram for GMC Suburban C1999 2500

List of elements for Passlock Wiring Diagram for GMC Suburban C1999 2500:

• (dash harn, 5 cm from dlc breakout) s280
• 12v
• 12v reg
• 5 volt ref
• Capacitor
• Data link connector (under left side of dash)
• Electronic power steering system
• Engine controls system
• Evo sol fd
• Evo sol out
• Evo/passlock module (under center of dash)
• G134 (diesel: front top of engine, gas: right top center of cylinder head)
• Gauges fuse 4 10a
• Grd
• Hot at all times
• Hot in run or start
• I/p fuse block
• Ign
• Instrument cluster
• Nca
• Passlck sig
• Passlock sensor (internal to steering column)
• Passlock signal
• Pnk
• Resistor 10 ohms
• S213
• S215
• Sec ind out
• Security fuse 21 10a
• Security indicator
• Sens ret
• Sensor grd
• Serial data
• Steering handwheel speed sensor (sensor ground)
• Vss
• Whl pos sig

COMPUTER DATA LINES

Computer Data Lines for GMC Suburban C1999 2500

List of elements for Computer Data Lines for GMC Suburban C1999 2500:

• (diesel) g134 (front to of engine)
• (right front of eng, near thermostat housing) (gas) g131
• 13 cm from ebcm breakout)
• Automatic transfer case control module (behind left side of dash)
• Aux pwr fuse 7 25a
• Data clss
• Data clss 2
• Data link connector (dlc) (under left side of dash, left of steering column)
• Diag enable
• Diesel
• Electronic brake control module (ebcm) (on left side of engine compt)
• Electronic variable orifice/passlock control module (under center of dash)
• Except luxury
• G202 (behind left side of dash)
• Gasoline
• Hot at all times
• I/p fuse block
• Inflatable restraint sensing & diagnostic module (under driver's seat carpet)
• Powertrain control module (pcm) (behind right side of dash, near blower motor)
• Prog enable
• Radio
• Remote control door lock receiver (behind center of dash)
• S204
• S215
• S245
• S272
• S280 (dash harness, approx 5 cm from dlc breakout)
• S294
• Serial data
• Tan
• Transfer case control module (tccm) (under dash, on steering column support bracket)
• Uart data
• Vehicle control module (vcm) (on left side of engine compt)
• Vehicle interface unit

COOLING FAN

Cooling Fan Wiring Diagram for GMC Suburban C1999 2500

List of elements for Cooling Fan Wiring Diagram for GMC Suburban C1999 2500:

• (fwd lamps harn, 5 cm from right headlamp breakout)
• (in underhood fuse/relay center)
• A/c comp fuse 10a
• Aux fan fuse 30a
• Auxiliary cooling fan motor
• Auxiliary cooling fan relay
• G112 (right front of engine compartment)
• Hot at all times
• Hot in run or start
• Red
• Relay ctrl
• S128
• Underhood fuse block
• Vehicle control module (left rear of engine compt)

CRUISE CONTROL

5.7L

5.7L VIN R, Cruise Control Wiring Diagram for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Cruise Control Wiring Diagram for GMC Suburban C1999 2500:

• (i/p harn, 20 cm from heater/ a/c breakout) s222
• (i/p harn, left rear of engine compt)
• A/t
• A12
• A13
• A14
• A15
• Brake fuse 18 10a
• Clutch pedal position switch (top of clutch pedal)
• Cruise control module (left rear of engine compartment)
• Cruise control switch
• Cruise engage input
• Cruise fuse 6 10a
• Cruise on input
• Engine control system
• Exterior light system
• G119 (right front of engine, near thermostat housing)
• Ground
• Hot at all times
• Hot in run
• I/p fuse block (left side of dash)
• Ignition
• M/t
• Off
• R/a
• Resume/accel sig
• S/c
• S153
• S215
• S220 (i/p harness, 6 cm from steering column harness breakout)
• S221 (i/p harn, 20 cm from cluster breakout)
• S299
• Set/coast sig
• Shift inter- lock system
• Speed sensor input
• Speed sensor output
• Stop/haz fuse 1 20a
• Stoplamp or clutch sw input
• Stoplamp sw input
• Stoplamp switch (top of brake pedal)
• Vcm signal
• Vehicle control module (vcm) (left side of engine compt)
• Vehicle speed sensor (vss) (left side of transmission)
• Vss high
• Vss low

6.5L

6.5L VIN F, Cruise Control Wiring Diagram for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Cruise Control Wiring Diagram for GMC Suburban C1999 2500:

• (behind right side of dash)
• (behind right side of dash) powertrain control module (pcm)
• (i/p harn, 6 cm from steering column breakout) s220
• A/t
• A11
• A12
• A13
• A14
• A15
• Antilock brake system
• B10
• B11
• Brake fuse 18 10a
• Clutch pedal position switch (top of clutch pedal)
• Cruise control switch
• Cruise fuse 6 10a
• Cruise on input
• D10
• Engine control system
• Exterior light system
• Hot at all times
• Hot in run
• I/p fuse block (under left side of dash)
• M/t
• Off
• R/a
• Resume/accel sig
• S/c
• S152 (eng harn, 4 cm from i/p harn breakout)
• S211
• S220
• S222 (i/p harn, 20 cm from inflatable restraint switch breakout)
• S299
• Set/coast sig
• Stop/haz fuse 1 20a
• Stoplamp switch (top of brake pedal)
• Stoplamp switch input
• Stoplamp/ clutch switch input
• Vehicle speed sensor (vss) (left side of transmission)
• Vehicle speed sensor buffer
• Vss high
• Vss input
• Vss low
• Vss output

DEFOGGERS

Defogger Wiring Diagram for GMC Suburban C1999 2500

List of elements for Defogger Wiring Diagram for GMC Suburban C1999 2500:

• (utility only)
• (w/ heated mirrors)
• C222
• Convenience center (under left side of dash)
• G201 (right side of dash)
• G202 (behind left side of dash)
• G305 (right "b" pillar)
• G415 (frame ground, rear of vehicle)
• Heated mirror relay (in underhood fuse/relay center)
• Heater and a/c control switch
• Hot in run
• Hot in run or start
• Htr-a/c fuse 12 25a
• I/p fuse block
• Left cargo door contactor
• Left heated mirror
• Left outside rear view mirror
• Left rear cargo door defogger grid
• Mirrors fuse 10a
• Nca
• Nca a
• Pick-up w/ extended or crew cab
• Rear defogger switch
• Rear window defogger grid
• Right cargo door contactor
• Right heated mirror
• Right rear cargo door defogger grid
• Rr-defog fuse 30a
• S218
• S223
• S251
• S259
• S268
• S410
• S425
• S506 (inside power outside rear view mirror harn., 7 cm from power outside rear view mirror)
• Solid state time delay relay
• Suburban/utility w/ liftgate
• Suburban/utility w/o liftgate
• Underhood fuse/relay center

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for GMC Suburban C1999 2500

List of elements for Electronic Power Steering Wiring Diagram for GMC Suburban C1999 2500:

• (front top of engine) g134 (2000)
• (i/p harness, approximately 40 cm from instrument cluster breakout)
• (i/p harness, approximately 5 cm from dlc breakout)
• (right front of engine) g119
• (right rear of engine)
• 5 volt ref
• Battery
• Data
• Data link connector (dlc) (under left side of dash, left of steering column)
• Diesel
• Electronic variable orifice (evo)/ passlock module (under center of dash)
• Evo feed
• Evo solenoid out
• G117 (1999)
• Gas
• Gauges fuse 4 10a
• Ground
• Hot at all times
• Hot in run or start
• I/p fuse block (under left side of dash)
• Ignition
• Pnk
• S213
• S215
• S221
• S280
• Security/strg fuse 21 20a
• Sensor return
• Steering assist control solenoid (part of power steering pump)
• Steering handwheel speed sensor (on steering column, near firewall)
• Steering wheel posit signal
• Sws posit sig
• Vehicle control module (on left side of engine compartment)
• Vehicle speed sensor buffer (behind right side of dash)
• Volt ref
• Vss sig out
• Vss signal input

ENGINE PERFORMANCE

5.7L

5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (1 of 4) for GMC Suburban C1999 2500:

• (attached to right rear of throttle body) idle air control (iac) valve
• (behind right side of dash)
• (bottom front of engine near, crank pulley) crankshaft position sensor
• (top right side of engine) evaporative emission canister purge valve
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• 3-2 shift sol ctrl
• A/t w/ 4wd
• Air pump rel ctrl
• Cam posit sens sig
• Camshaft position sensor (inside distributor)
• Crank posit sens sig
• Ect sens sig
• Egr posit sig
• Fuel gauge lvl
• Fuel tank press sens
• G119 (right front of engine block)
• Heated oxygen sensor (5.ol: bank 1 sensor 3, 5.7l w/ below 8600 gvw: bank 1 sensor 2, 5.7l w/ over 8600 gvw: bank 2 sensor 2) (in exhaust pipe in back of right catalytic converter)
• Heated oxygen sensor (bank 1 sensor 1) (in exhaust pipe in front of left catalytic converter)
• Heated oxygen sensor (bank 2 sensor 1) (in exhaust pipe in front of right catalytic converter)
• Ho2s low
• Ho2s sig
• Iat sens sig
• Idle air ctrl (iac) a hi
• Idle air ctrl (iac) b lo
• Ign feed
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Inj 7 ctrl
• Inj 8 ctrl
• Knock sens sig
• Knock sensor (ks) (right side of engine block, below exhaust manifold, forward of starter)
• Map sens input
• Mass air flow sens sig
• Nca
• Others
• Pnk
• Pnk c ignition feed
• Pnk pnk
• S148
• S149
• S162
• Sens rtn
• Sens sig
• Sensor return
• Tan
• Tcc pwm sol ctrl
• Tcc sol ctrl
• Temp sens input
• Throttle posit sens
• Vehicle control module (vcm) (left side of engine compt)
• Vehicle speed sensor (left side of transmission, left side of transfer case w/ 4wd)
• Vehicle speed sensor buffer
• Vent ctlr
• Vss rtn
• Vss sig
• Vss signal

5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (2 of 4) for GMC Suburban C1999 2500:

• 2-3 red
• 3-2 red shift solenoid
• Air injection reaction (secondary) pump (on front of engine)
• Air injection reaction relay (underhood fuse/ relay center)
• Automatic transmission
• Aux-b fuse 30a stud-b
• Ecm1 fuse 20a
• Eng1 k7
• Evaporative emissions (evap) canister vent valve (left side of engine compt)
• Exhaust gas recirculation (egr) valve (front of engine near thermostat housing)
• Fluid pressure (tfp) manual valve position switch
• Fluid temperature sensor
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj 7
• Fuel inj 8
• Fuse 20a l8
• G127 (left side of engine compt, on air injection reaction pump)
• Heated oxygen sensor (5.ol: bank 1 sensor 2, 5.7l w/ below 8600 gvw: bank 2 sensor 2, 5.7l w/ over 8600 gvw: bank 1 sensor 2) (in exhaust pipe in back of left catalytic converter)
• Hot at all times
• Hot in run & start
• Nca
• Pnk
• Pnk pnk pnk tan red
• Pressure control solenoid valve
• Red
• Red tcc solenoid
• S104
• S108
• S147
• S161
• S166 (eng harn, 18 cm from ebcm breakout)
• Shift solenoid
• Tan
• Torque convertor clutch pulse width modulation solenoid
• Under hood fuse-relay center
• W/4l80e 4-speed trans oly

5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (3 of 4) for GMC Suburban C1999 2500:

• (eng harn, approx 17 cm from breakout to egr valve) s106
• (eng harn, hd: 10 cm from egr valve breakout, ld: 27 cm from egr valve breakout)
• (engine harn, approx 16 cm from breakout to egr valve)
• (inside left frame rail, near rear crossmember)
• (inside left frame rail, near rear crossmember) g415
• (right rear of cylinder head) g117
• (taillamp extension harn, 6 cm from the fuel pump harn breakout)
• (taillamp extension harness, approx 10 cm from fuel pump balance module breakout)
• Automatic transmission input shaft speed sensor (left side of transmission)
• Balance fuel pump (on inside left frame rail, near front of rear tank)
• Convenience center (under left side of dash)
• D w/ dual fuel tanks
• Engine coolant temperature sensor (top right front of engine, near thermostat housing)
• F7 ign e fuse 10a g8
• Fuel gauge input
• Fuel pump & sender (in fuel tank)
• Fuel pump balance module (inside left side of frame rail)
• Fuel pump balance relay (on fuel pump balance module)
• Fuel tank pressure sensor (in fuel tank)
• Fuel tanks
• G415
• Gauges fuse 4 10a
• Ground
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Ignition
• Instrument cluster
• Intake air temperature sensor (in air intake duct)
• M/t only
• Manifold absolute pressure (map) sensor (top right of engine, near fuel injectors)
• Mass air flow sensor (in air intake duct)
• Output to gauge c2
• Pnk
• Pnk a
• Pnk pnk tan red
• Primary tank fuel lvl sig
• Relay ctrl
• S103
• S213
• S231
• S232
• S315
• S318
• S319
• S324
• S430
• Secon tank fuel lvl sig
• Secondary fuel gauge sender (in fuel tank)
• Service engine soon indicator
• Speedometer input
• Tachometer input
• Tan a
• Throttle position sensor (on throttle body assembly)
• Trans fuse 20 10a
• Underhood fuse-relay center pnk
• Upshift lamp
• W/ dual fuel tank
• W/ dual w/o dual fuel tank
• W/o dual fuel tank
• W/o dual fuel tanks

5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Engine Performance Wiring Diagrams (4 of 4) for GMC Suburban C1999 2500:

• (engine harness, approx 13 cm from s150
• (engine harness, approx 7 cm from ebcm breakout)
• (i/p harn, 20 cm from inflatable restraint switch breakout)
• (i/p harn, harness, 13 cm from left engine grommet)
• (i/p harness, approx 40 cm from instrument cluster breakout)
• (or
• (right rear of cylinder head) g120
• 4wd input
• 5v ref voltage
• A pnk
• A/c comp enable rel
• A/c request signal
• A/t
• Air conditioning system
• Air inlet vlv mtr ctlr
• Aux fan relay
• Brake sw input
• Brake switch input
• Check eng lp ctrl
• Clutch pedal position (cpp) switch (at top of clutch pedal)
• Cooling fans system
• Cpp sw input
• Cruise control module (left rear of engine compt, on firewall)
• Cruise ctrl sig eng
• Data link connector (under left side of dash, left side of steering column)
• Distributor
• Dual fuel mod return
• Ebcm breakout)
• Egr vlv feed
• Egr vlv ground
• Electronic brake control module (ebcm) (on left side of engine compt)
• Electronic variable orifice/ passlock control module (center of dash)
• Est output sig
• Evap can purge vlv
• F11 ecmb fuse 20a
• Force motor feed
• Force motor return
• Four whl dr sig
• Four whl dr sig lo
• Fuel level input
• Fuel pump a prime connector (left rear of eng compt)
• Fuel pump relay
• Fuel pump rly ctrl
• G117 (right rear of cylinder head)
• G12
• Ground
• High voltage coil wire
• Hot at all times
• Hot in run
• I/p fuse block
• Ign coil out
• Ign input
• Ign timing sig.
• Ignition
• Ignition coil (top left rear of engine)
• Ignition coil driver (left rear side of engine)
• Ignition feed
• M/t
• M4 brake fuse 18 10a n3
• Pnk
• Pressure switch input
• Radio
• Red
• S101
• S103
• S111 (engine harness, approx 10 cm from ebcm breakout)
• S151
• S152
• S153
• S221
• Sensor ground
• Sensor return
• Serial data sig
• Shift ind lp out
• Speed sensor
• Speed sensor input
• Stoplamp switch (top of brake pedal)
• Stoplamp/ clutch switch input
• Switch signal
• Trans input speed rtn
• Trans input speed sig
• Transfer case control module (under dash, on steering column support bracket)
• Transfer case switch (left top of transfer case)
• Transmissions system
• Underhood fuse- relay center
• Vcm sig
• Vehicle control module (vcm) (left side of engine compt)
• Vss input
• Vss sig out

6.5L

6.5L VIN F, Engine Performance Wiring Diagrams (1 of 4) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (1 of 4) for GMC Suburban C1999 2500:

• (bottom front of engine, near crank pulley) crankshaft position (ckp) sensor
• (engine harn, 31 cm from taillamp harn breakout)
• (engine harness)
• (i/p harn, approx 16 cm into i/p cluster breakout)
• (i/p harness)
• (top center of engine) boost pressure sensor
• (top of engine, near
• (top rear of right cylinder head) g117
• (top right front of engine, near thermostat housing) engine coolant temperature (ect) sensor
• 12v
• 3/2 shift sol
• 4wd signal
• 5 volt ref
• 5 vref
• 5v ref volt
• A/c request sig
• A/c system
• A/t fluid pressure (tfp) manual valve position switch
• A/t w/ 4wd
• A10
• A11 3 mode cruise a12
• Anti-lock brakes system
• App 1 sig
• App 2 sig
• App 3 sig
• Automatic transmission
• Automatic transmission input shaft speed (a/t iss) sensor (left side of transmission)
• B10
• B11
• B12
• Baro sensor input
• Brake sw in
• Brake switch input
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• Cam posit sens sig rtn
• Camshaft posit sens
• Closure gnd
• Cruise control system
• Cruise ctrl sw engage
• Cruise eng sw retard
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Ect temp sens in
• Engine crank sens input
• Exhaust gas recirculation (egr) control/ barometric (baro) pressure sensor (upper left side of firewall, next to wiper motor)
• Force mtr hi
• Force mtr low
• Fuel pump input
• Fuel pump rly ctrl
• Fuel sol closure (5v sig)
• Fuel temp sens (5v sig)
• Glow plug "wait" lp out
• Glow plug relay
• Ground
• Intake air temperature (iat) sensor
• Intake man air temp sens
• Intake manifold
• Map sens input
• Mass air flow sig
• Nca
• Opening)
• Others
• Pnk
• Powertrain control module (pcm) (behind right side of dash, near blower motor)
• Pressure control solenoid valve
• Radio
• Range mode sel a
• Range mode sel b
• Range mode sel c
• Red
• S140
• S170
• S199
• S211
• S215
• S230
• Sensor gnd
• Shift red sol a
• Shift red sol b
• Tan
• Timing stepper mtr (high)
• Timing stepper mtr (low)
• Transmission speed input
• Transmission temp input
• Transmission temperature sensor
• Transmissions system
• Vehicle speed input
• Vehicle speed sensor (left side of transmission)
• Vehicle speed sensor adapter
• Vehicle speed sensor buffer (behind right side of dash)
• Vss hi
• Vss lo
• Vss output
• Vss rtn
• Vss sig

6.5L VIN F, Engine Performance Wiring Diagrams (2 of 4) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (2 of 4) for GMC Suburban C1999 2500:

• (a/t: eng harn, approx 4 cm from i/p harness breakout, m/t: i/p harn, 20 cm from inflatable restraint i/p module switch breakout)
• (engine harn)
• (on inj pump)
• 5 volt ref
• Accelerator pedal position (app) module (part of accelerator pedal)
• Clutch pedal position (cpp) switch (m/t only) (top of clutch pedal bracket)
• Cmp sig
• D2 trans fuse 20 20a e1
• D8 stop/haz fuse 1 20a c7
• Ecm-1 h7
• Electronic brake control module (on left side of engine compt)
• Engine shutoff solenoid (top of fuel injection pump)
• Fuel solenoid (rear of fuel injection pump)
• Fuel solenoid driver (left side of fuel injection pump)
• Fuse 20a
• High res sig
• Hot at all times
• Hot in run
• Hot in run or start
• I/p fuse block
• Injection timing stepper motor (top right front of engine)
• M4 brake fuse 18 10a n3
• Nca
• Optical fuel temperature sensor (on top of fuel injection pump)
• Pnk
• Pnk pnk
• Power distribution system
• Red
• S190
• S198
• S220 (i/p harness, approx 6 cm from steering column breakout)
• S222 (m/t) s152 (a/t)
• S299
• Sens grd
• Stop- lamp switch (on top of brake pedal)
• Tan d
• Underhood fuse-relay center

6.5L VIN F, Engine Performance Wiring Diagrams (3 of 4) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (3 of 4) for GMC Suburban C1999 2500:

• (inside left frame rail, below driver's door)
• (m/t: engine harness, approx 37 cm from breakout to ebcm, a/t: engine harness, approx 31 cm from taillamp harn breakout) s100
• (taillamp extension harness, approx 10 cm from fuel pump balance module breakout)
• (top rear of right cylinder head)
• (top rear of right cylinder head) g117
• Ecm-b fuse 20a
• F11
• Fuel lift pump
• Fuel pump prime connector (left side of eng compt)
• Fuel pump relay (in under fuse-relay center)
• Fuel pump/oil pressure switch (under intake manifold, center of engine)
• G117
• G117 (top rear of right cylinder head)
• G12
• Gauges fuse 4 10a
• Hot at all times
• Hot in run or start
• I/p fuse block
• Instrument cluster
• Instrument cluster system
• Instrument cluster system (fuel pump balance relay)
• Pnk
• Red
• S101
• S103
• S147
• S213
• S318
• Service engine soon indicator
• Service throttle soon indicator
• Tan
• Underhood fuse-relay center
• Vehicle speed input
• W/ dual tanks
• W/o dual tank
• Wait to start "glow plugs" indicator
• Water in fuel indicator
• Water in-fuel sensor (on fuel filter/ manager)

6.5L VIN F, Engine Performance Wiring Diagrams (4 of 4) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Engine Performance Wiring Diagrams (4 of 4) for GMC Suburban C1999 2500:

• "serv eng soon" ind
• "serv throttle soon" ind
• (at air intake duct) mass air flow (maf) sensor
• (engine harness)
• (engine harness, approx 13 cm into ebcm breakout)
• (on fuel manager/filter) fuel heater
• (top rear of right cylinder head) g117
• 12v battery (fused)
• 12v battery fused
• 3/2 ctrl out
• A/c enable
• A/c system
• C10
• C11
• C12
• C13
• C14
• C15
• C16
• D10
• D11
• D12
• D13
• D14
• D15
• D16
• Data link connector (dlc) (under left side of dash, left of steering column)
• Egr sol output
• Egr valve sol putput
• Eng-i k7
• Engine shutoff sol out
• Exhaust gas recirculation (egr) vent solenoid (top center of engine)
• Exhaust gas recirculation egr solenoid (top left side of engine)
• Fuel sol module (5 vref)
• Fuel sol module feed
• Fuse 20a
• Fusible link
• Fusible links
• G117 (top rear of right cylinder head)
• Glow plug 1
• Glow plug 2
• Glow plug 3
• Glow plug 4
• Glow plug 5
• Glow plug 6
• Glow plug 7
• Glow plug 8
• Glow plug output
• Glow plug relay (top left rear of engine)
• Grd
• Ground
• Hot at all times
• Hot in run or start
• Ign
• Ignition
• Pcm gnd
• Pnk
• Powertrain control module (pcm) (behind right side of dash, near blower motor)
• Red
• Relay ctrl
• S103
• S108
• S137
• S138
• S147
• S150
• S191
• S269 (i/p harness)
• Serial data sig
• Shift sol a input
• Shift sol b input
• Signal
• Tan
• Tps 2 ref voltage
• Underhood fuse-relay center
• Wait to start ind
• Wastegate sol
• Wastegate solenoid (top left rear of engine)

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for GMC Suburban C1999 2500

List of elements for Back-up Lamps Wiring Diagram for GMC Suburban C1999 2500:

• (chassis cab) a c
• (ex chassis cab)
• (left side of transmission) back-up lamp switch
• A c
• A/t
• G415 (left frame rail, behind bumper)
• Hot in run or start
• I/p fuse block
• Left back-up lamp
• M/t
• Mirrors system (automatic day/night mirror)
• Pnk
• Right back-up lamp
• S411
• S414
• Trailer tow connector
• Transmission range switch (left side of transmission)
• Turn b/u fuse 16 20a

Exterior Lamps Wiring Diagram for GMC Suburban C1999 2500

List of elements for Exterior Lamps Wiring Diagram for GMC Suburban C1999 2500:

• (dash harness behind left side of dash) s210
• (execpt suburban/ utility)
• (forward lamps harn, 35 cm from wiper harn breakout) s122
• (forward lamps harness, 5 cm from right headlamp breakout) s127
• (front to rear body harness, near chmsl harness breakout)
• (license lamp harness, near license lamp toward taillamp breakout) s415
• (rear lamps harn, 27 cm from trailer harness breakout) (w/ duel rear wheels) s413
• (tail- lamp harness, near taillamps extension harness break- out) s412
• Aux fuse 22 20a
• Auxiliary lead (taped to harness)
• Back-up lights circuit
• Cargo lamp
• Cargo lamp (2 bulbs)
• Cargo lamp switch
• Center high mount stop lamp
• Chmsl lamp (2 bulbs)
• Cruise control system
• Ctsy fuse 20a
• Fuse block
• G108 (left radiator support, near left headlamp)
• G119 (right front of engine block)
• G1o1 (right front side of engine compt)
• G201 (right side of dash)
• G202 (behind left side of dash)
• G305 (right "b" pillar)
• G415 (left frame rail, behind bumper)
• H9 turn pwr h8 haz pwr h7 flshr out g8 gnd
• Hazard
• Headlamp & panel dimmer switch
• Headlights system
• Hot at all times
• Hot in run, bulb test or start
• I/p fuse block
• Instru- ment cluster
• Interior lights system
• Left
• Left front marker lamp
• Left front park/ turn lamps
• Left spotlamp assembly (police package)
• Left tail/ stop/ turn lamp
• Left turn indic
• License lamp
• License lamps
• Maxi fuse 30a
• Nca
• Normal
• Off
• Park
• Park lps fuse 9 20a
• Pickup
• Pnk
• Police package (1999 only)
• Rear clearance lamps circuit
• Red
• Rheo- stat
• Right
• Right front marker lamp
• Right front park/ turn lamps
• Right spotlamp assembly (police package)
• Right tail/ stop/ turn lamp
• Right turn indic
• Roof marker lamps
• S107
• S119 (forward lamps harn, 16 cm from wiper harn breakout)
• S123
• S128
• S204
• S215
• S220 (dash harn, 6 cm from column harness breakout)
• S242
• S259
• S283 (spotlamp ext harness)
• S299
• S316
• S411
• S416
• S419
• S421 (tail/stop lamp harness, 7 cm from g415)
• S422 (tail/stop lamp harn, 7 cm from trailer harness breakout)
• S424
• Stop- lamp relay (except subur- ban/ utility)
• Stop/ haz fuse 1 20a
• Stoplamp switch (top of brake pedal)
• Suburban/ utility
• Trailer tow connector
• Turn- b/u fuse 16 15a
• Turn/ hazard switch
• Turn/hazard flasher (on convenience center)
• Under- hood fuse relay center (left rear of engine compt)
• Under- hood fuse- relay center (left rear of engine compt)
• W/ dual rear wheels
• W/ step bumper
• W/o step bumper

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 4) for GMC Suburban C1999 2500

List of elements for Ground Distribution Wiring Diagram (1 of 4) for GMC Suburban C1999 2500:

• (i/p harness, approx 24 cm from instrument cluster breakout)
• (left front of intake manifold)
• (right front of engine)
• A16
• Ashtray lamp
• Audio alarm module
• Automatic transfer case control module
• Automatic transfer case select switch
• Auxiliary cooling fan motor
• Auxiliary heater control switch (suburban/ utility)
• Body control module
• Brake trans- mission shift interlock switch
• C ground strap
• C10
• Cargo lamp switch (pickup)
• Cigar lighter
• Convenience center
• D10
• D12
• D13
• Data link connector
• Daytime running lamps module
• Drl/ radio override switch
• Fog lamp switch
• Front auxiliary power outlet
• Front windshield wiper/ washer pump motor
• G101 (right front side of eng compt, at wheelhousing)
• G101 (right front wheelhouse)
• G105 (right rear of engine compt)
• G108 (left radiator support, near left headlamp)
• G110 (diesel)
• G117 (right rear of engine)
• G119 (gasoline)
• G202 (behind left side of dash)
• Headlamp and panel dimmer switch
• Heater and a/c control switch
• Horn switch
• Hvac control module
• I/p compartment lamp
• Ignition switch
• Inflatable restraint i/p module enable switch
• Key-in warning buzzer switch (upper level)
• Left battery
• Left fog lamp
• Left front door jamb switch
• Left front park/ turn lamp
• Left high beam headlamp
• Left high/ low beam headlamp
• Left horn
• Left low beam headlamp
• Liftgate release switch (suburban/ utility)
• Low coolant level indicator module (diesel)
• Pickup only
• Police package
• Radio
• Rear stereo controller
• Rear window washer pump motor
• Rear window wiper/ washer switch (suburban/ utility)
• Right fog lamp
• Right front door jamb switch
• Right front park/ turn lamp
• Right high beam headlamp
• Right high/ low beam headlamp
• Right horn
• Right low beam headlamp
• S123 (forward lamps harness, approx 23 cm from left park/lamp breakout)
• S128 (forward lamps harness, approx 5 cm from right headlamp breakout)
• S158 (in washer pump jumper harness)
• S204 (i/p harness, approx 10 cm from steering column harn)
• S218 (i/p harness, aprrox 16 cm from dlc breakout)
• S298
• S336 (floor console harn, approx 5 cm from crossbody in-line connector breakout)
• Shock sensor
• Spare
• Spot lamp
• Spot lamp relay
• To s316 (diagram 2 of 4)
• Transfer case control module
• Transfer case select switch
• Turn/ hazard flasher
• Uncoated
• Under- hood lamp
• Vehicle interface unit (upper level)
• W/ dual horns
• W/ quad headlamps
• W/ quad headlamps/ sport package
• Windshield wiper motor module

Ground Distribution Wiring Diagram (2 of 4) for GMC Suburban C1999 2500

List of elements for Ground Distribution Wiring Diagram (2 of 4) for GMC Suburban C1999 2500:

• (4wd harn, approx 10 cm from transfer case relay breakout)
• (eng harn, approx 16 cm into vehicle speed sensor breakout)
• (engine harness, near diode)
• (i/p harness, approx 8 cm from i/p cluster breakout)
• (illuminated vanity mirror jumper, approx 11 cm toward left illuminated vanity mirror)
• (oxygen sensor jumper harn, approx 7 cm from right bank oxygen sensor harn)
• (right front of engine block) g119
• (right front of engine, near thermostat housing)
• 87a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c compressor cycling switch
• A/c compressor pressure switch
• A/c low pressure switch
• Air injection reactor pump (7.4l only)
• Air pump
• Automatic transfer case module
• Brake pressure warning switch
• Cruise control module
• Data link connector
• Diesel
• E16
• Electrochromic rearview mirror w/ compass
• Electronic brake control module
• Evo passlock module
• Except suburban/ utility
• From s204 (diagram 1 of 4)
• Front axle actuator
• Fuel heater
• Fuel pump and sender
• Fuel pump relay
• G110 (left front of engine)
• G119
• G134 (right top center of cylinder head)
• G202 (left side of dash)
• Gasoline
• Glow plug relay
• Heated oxygen sensor (5.0l: bank 1 sensor 2, 5.7l w/ below 8600 gvw: bank 2 sensor 2, 5.7l w/ over 8600b gvw & 7.4l: bank 1 sensor 2)
• Heated oxygen sensor (5.0l: bank 1 sensor 3, 5.7l w/ below 8600 gvw: bank 1 sensor 2, 5.7l w/ over 8600b gvw & 7.4l: bank 2 sensor 2)
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 1 sensor 2
• Ignition coil module
• Inflatable restraint front end sensor
• Inflatable restraint sensing & diagnostic module
• Instrument cluster
• Left illuminated vanity mirror
• Low coolant level sensor
• Mass airflow sensor
• Park/ neutral position switch
• Right illuminated vanity mirror
• Roof marker lamps
• S103 (eng harn, 5.0l/5.7l: 8 cm from egr, 6.5l/7.4l: 12 cm from starter solenoid breakout)
• S107 (engine harness, 5.0l/5.7l: approx 20 cm egr, 6.5l: approx 40 cm from ebcm, 7.4l: approx 18 cm from ebcm breakout)
• S147 (diesel: eng harn, approx 4 cm from starter motor solenoid, gas: eng harn, approx 5 cm from egr valve breakout)
• S149
• S156
• S162 (5.0l/5.77l: eng harn, 17 cm from starter solenoid breakout, 7.4l: eng harn, approx 15 cm from right bank oxygen sensor breakout)
• S167 (battery harn, at left side of eng compt)
• S185
• S186
• S215
• S302
• S302 (4wd harn, approx 10 cm from transfer case relay breakout)
• S316
• Starter relay
• Stoplamp relay
• Trans range switch
• Transfer case relay
• Transfer case shift switch
• Underhood fuse- relay center
• Vehicle control module
• Vehicle speed sensor
• W/o dual tanks
• Water in fuel sensor
• Water valve (suburban/ utility)

Ground Distribution Wiring Diagram (3 of 4) for GMC Suburban C1999 2500

List of elements for Ground Distribution Wiring Diagram (3 of 4) for GMC Suburban C1999 2500:

• (i/p harness, approx 12 cm from i/p cluster breakout)
• (inside left front door harness, 8 cm from tweeter speaker breakout)
• (left seat harn, approx 5 cm from power seat lumbar switch breakout)
• (right front seat harn, approx 5 cm from power seat lumbar switch breakout)
• (right side of dash)
• A/t only
• Audio amplifier
• Automatic transfer case shift control module
• Auxiliary power connector rear console
• Bench seat
• Body control module
• Cargo lamp
• Center high mount stop- lamp
• Data link connector
• Diesel
• Door lock inversion module
• Door lock relay
• Door lock switch
• E16
• Evo passlock module
• Four-wheel drive indicator lamp
• Front blower motor
• Fuel gage sender
• Fuel pump balance module
• Fuel pump relay
• G134 (front top of engine)
• G201
• Headlamp control module
• Heated mirror relay
• High blower motor relay
• Instrument cluster
• Interior lamp control module
• Left front power window switch
• Left front seat belt switch
• Left power lumbar support motor
• Left power seat adjuster switch
• Left rear heated seat element
• Left rear heated seat module
• Left rear heated seat switch
• Left rear power window switch
• Left rear seat belt switch
• Mass airflow sensor
• Mode door motor
• Others
• Pickup/ extended & crew only
• Power amplifier
• Power amplifier relay
• Power outside rearview mirror switch
• Powertrain control module
• Rear window lockout switch
• Recirculation door motor
• Remote control door lock receiver
• Right front power lumbar support motor
• Right front power outside rear view mirror motor
• Right front power seat adjuster switch
• Right front power seat lumbar motor
• Right front power window switch
• Right front seat belt switch
• Right power lumbar motor
• Right rear heated seat element
• Right rear heated seat module
• Right rear heated seat switch
• Right rear power window switch
• Right rear seat belt switch
• S103 (engine harness, approx 12 cm from starter solenoid breakout)
• S215
• S227
• S228
• S244 (hvac harn, approx 8cm from recirculation door breakout)
• S251 (crossbody harness, approx 13cm right of left door harness breakout)
• S259 (crossbody harness, approx 7 cm into seat belt switch breakout)
• S317 (taillamp extension harness, approx 10 cm from fuel gage sender breakout)
• S330 (floor console harn, approx 13 cm from heated seat breakout)
• S337 (left rear heated seat harn)
• S338 (right rear heated seat harn)
• S500
• Secondary fuel gage sender
• Security led
• Suburban only
• Temperature door motor
• Transfer case mode selector illumination lamp
• Under- hood fuse- relay center
• Upper level
• Vehicle speed sensor buffer
• W/ a/c
• W/ dual tanks
• W/ pwr wd
• W/ rke
• W/o a/c
• W/o pwr wd
• W/o rke
• Window defogger grid

Ground Distribution Wiring Diagram (4 of 4) for GMC Suburban C1999 2500

List of elements for Ground Distribution Wiring Diagram (4 of 4) for GMC Suburban C1999 2500:

• (auxiliary hvac harn, approx 7 cm from blower motor resistor breakout)
• (diesel)
• (front-to-rear body harn, appr0x 8 cm from chmsl breakout)
• (gas)
• (license lamps harness, approx 8 cm from tail- lamp harness breakout)
• (rear lamps harness, 17-33 cm from taillamps extension breakout)
• (right front seat harn, approx 5 cm from power seat lumbar switch breakout) s321
• Auxiliary blower motor
• Auxiliary heater- a/c logic module
• Auxiliary mode door motor
• Auxiliary temp door motor
• Cargo door lock relay
• Cargo doors
• Center high mount stoplamp
• Chassis cab & heavy duty
• Door lock control module (w/ cargo doors)
• Endgate marker lamps
• Except chassis cab & heavy duty
• Front auxiliary heater-a/c control module
• Front dome lamp
• Fuel pump & sender
• G305 (right 'b' pillar)
• G415 (left frame rail, behind bumper)
• G416 (inside left framerail, near rear crossmember)
• Garage door opener
• In-line resistor
• Left cargo door defogger grid
• Left door contact button
• Left front clearance lamp
• Left license lamp
• Left rear clearance lamp
• Left rear tail, stop, license, turn & backup lamps
• Left rear tail, stop, turn & backup lamps
• Left tail, stop, turn & backup lamps
• Lift gate
• Liftgate release relay
• Nca
• Overhead console lamps
• Pickup w/ dual rear wheels
• Reading lamp overhead console
• Rear auxiliary heater-a/c control module
• Rear auxiliary power connector
• Rear dome lamp
• Rear door jamb switch
• Rear liftgate window defogger grid
• Rear wiper motor module
• Right cargo door defogger grid
• Right door contact button
• Right front clearance lamp
• Right license lamp
• Right rear clearance lamp
• Right rear tail, stop, license, turn & backup lamps
• Right rear tail, stop, turn & backup lamps
• Right tail, stop, turn & backup lamps
• S307 (rear hvac control harness, approx 10 cm from hvac logic module breakout)
• S319 (taillamp extension harn, approx 7cm from fuel pump and sender breakout)
• S403
• S410 (front to rear lamps harness, 1213 cm from right rear door speaker breakout)
• S411
• S411 (rear lamps harness, 17-33 cm from taillamps extension breakout)
• S416
• S424
• Suburban & utility
• Trailer ground (taped back)
• Upper level
• W/ dual tanks

HEADLIGHTS

Headlight Wiring Diagram, with Quad Headlamps for GMC Suburban C1999 2500

List of elements for Headlight Wiring Diagram, with Quad Headlamps for GMC Suburban C1999 2500:

• (forward lamps harn, approx 12cm from left headlamp breakout toward windshield washer pump)
• (i/p harn, near strng col harn breakout; except gas) (i/p harn, near auxiliary power outlet; gas)
• Acc
• Brake ind ctrl
• Brake warn in
• Bulb test
• Convenience center (under left side of dash)
• Daytime running lamps module (behind left side of dash)
• Daytime running lamps relay
• Diode 203
• Drl indicator
• Drl relay ctrl
• Drl-fog fuse 15 20a
• Exterior lights system
• Fog lamp relay
• Fog lamp switch
• G101 (right front inner fender)
• G108 (left radiator support)
• G134 (right top center of cylinder head)
• G202 (behind left side of dash)
• Gages fuse 4 10a
• Ground
• Head
• Head- lamp dimmer switch
• Headlamp and panel dimmer switch
• High beam indicator
• Hot at all times
• Hot in run, bulb test or start
• I/p fuse block (left side of dash)
• Ignition
• Ignition switch
• Illum lamp
• Ind bulb chk
• Instrument cluster
• Instrument cluster system (brake warning indicator)
• Interior lights system
• Lamp feed
• Left fog lamp
• Left high beam head- lamp
• Left low beam head- lamp
• Lighting fuse 8 50a
• Lock
• Nca
• Off
• On indicator
• Park
• Park brake sig
• Park brake warning switch
• Pk lps fuse 9 20a
• Pnk
• Red
• Red c
• Right fog lamp
• Right high beam head- lamp
• Right low beam head- lamp
• Run
• S120 (forward lamps harn, near windshield washer pump breakout, toward left hdlp)
• S121
• S123
• S128
• S204
• S205
• S210
• S213
• S215
• S218
• S225 (i/p harn, approx 12cm from radio harn breakout)
• S298
• Start
• Tan
• Underhood fuse/relay center (left rear of engine compt)
• W/ fog lamps

Headlight Wiring Diagram, with Sealed Beam Headlamps for GMC Suburban C1999 2500

List of elements for Headlight Wiring Diagram, with Sealed Beam Headlamps for GMC Suburban C1999 2500:

• (forward lamps harn, approx 12cm from left headlamp breakout toward windshield washer pump)
• (high)
• (i/p harn, near strng col harn breakout; except gas) (i/p harn, near auxiliary power outlet; gas)
• (low)
• A (high)
• A (low)
• Acc
• Brake ind ctrl
• Brake warn in
• Bulb test
• Convenience center (under left side of dash)
• Daytime running lamps module (behind left side of dash)
• Daytime running lamps relay
• Diode 203
• Drl indicator
• Drl relay ctrl
• Drl-fog fuse 15 20a
• Exterior lights system
• Fog lamp relay
• Fog lamp switch
• G101 (right front inner fender)
• G108 (left radiator support)
• G134 (right top center of cylinder head)
• G202 (behind left side of dash)
• Gages fuse 4 10a
• Ground
• Head
• Head- lamp dimmer switch
• Headlamp and panel dimmer switch
• High beam indicator
• Hot at all times
• Hot in run, bulb test or start
• I/p fuse block (left side of dash)
• Ignition
• Ignition switch
• Illum lamp
• Ind bulb chk
• Instrument cluster
• Instrument cluster system (brake warning indicator)
• Interior lights system
• Lamp feed
• Left fog lamp
• Left head- lamp
• Lighting fuse 8 50a
• Lock
• Nca
• Off
• On indicator
• Park
• Park brake sig
• Park brake warning switch
• Pk lps fuse 9 20a
• Pnk
• Red
• Red c
• Right fog lamp
• Right head- lamp
• Run
• S120 (forward lamps harn, near windshield washer pump breakout toward left headlamp)
• S121
• S123
• S128
• S204
• S205
• S210
• S213
• S215
• S218
• S225 (i/p harn, approx 12cm from radio harn breakout)
• S298
• Start
• Tan
• Tan c
• Underhood fuse/relay center (left rear of engine compt)
• W/ fog lamps

HORN

Horn Wiring Diagram for GMC Suburban C1999 2500

List of elements for Horn Wiring Diagram for GMC Suburban C1999 2500:

• (inside left door harness, approx 25 cm to outside mirror breakout) s124
• A11
• Base
• Body control module (in center console)
• C1 c9
• C210
• C266
• Convenience center (under left side of dash)
• G103 (right front of engine compt, at wheelhousing)
• G202 (behind left side of dash, below fuse box)
• Horn fuse 20a
• Horn relay
• Horn slip ring
• Horn switch
• Hot at all times
• Left horn (front of vehicle)
• Luxury
• Remote control door lock receiver (behind center of dash)
• Right horn (w/ front end appearance package only) (front of vehicle)
• S113
• S128
• S204
• S293 (inside left door harn, approx 25 cm to outside mirror breakout
• Steering wheel
• Underhood fuse/relay center
• Underhood fuse/relay center (left rear of engine compt)
• Vehicle interface unit receiver (under- neath right rear seat)

INSTRUMENT CLUSTER

5.7L

5.7L VIN R, Instrument Cluster Wiring Diagram for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, Instrument Cluster Wiring Diagram for GMC Suburban C1999 2500:

• (6 bulbs)
• (engine harn)
• (taillamp extension harn, approx 10 cm from breakout to ground at left side of frame rail)
• (taillamp extension harn, approx 6 cm from fuel pump harness breakout)
• 5v ref
• 7.4l vin j only
• A/t
• A/t 4wd
• Accy
• Air bag ind
• Anti- lock brakes ind
• Anti-lock brakes system
• Anti-theft system
• Bat ind
• Brake ind
• Brake pressure warning switch (on underside of electronic brake control module)
• Brake psi
• Check gauges ind
• Check gauges lamp driver
• Convenience center
• Daytime running lamps ind
• Daytime running lamps module (behind left side of dash, taped to panel wiring harness)
• Electronic brake control module (on left side of engine compt)
• Engine controls system (fuel pump balance relay)
• Engine coolant temperature sender (left cylinder head, near no1 spark plug)
• Exterior lights system
• Fuel
• Fuel gauge
• Fuel in
• Fuel pump & sender (in fuel tank)
• Fuel pump balance module (inside left (side of frame rail)
• Fuel pump/ oil pressure switch & sender (rear top center of engine)
• Fuel tank
• G119 (right front of engine block)
• G134 (right top center of cylinder head)
• Gauges fuse 4 10a
• Gnd
• Headlights system
• Hi beam ind
• Hot in run or start
• Hot in run, bulb test or start
• I/p fuse block
• Ign
• Ign e mini fuse 10a
• Ign sw
• Ignition coil (top left rear of engine)
• Ignition switch
• Illum
• Illumination
• Instrument cluster
• Interior lights system
• Led dimming
• Left turn ind
• Lock
• M/t
• M/t 4wd & all 2wd
• Malfunc- tion indicator lamp (service engine soon)
• Mil ind
• Off
• Oil gauge
• Parity prndl
• Park brake warning switch (on park brake pedal bracket)
• Pk brake
• Pnk
• Prndl
• Prndl a
• Prndl b
• Prndl c
• Right turn ind
• Run
• S146
• S147
• S162
• S213
• S215
• S232
• S324
• S325 (cali)
• S430
• Safety belt ind
• Secondary fuel gage sender (in rear fuel tank)
• Security ind
• Sens rtrn
• Single dual fuel tanks
• Speedo
• Speedometer
• Start
• Starting/charging system
• Tach
• Tan
• Temp gauge
• Trans fuse 20 10a
• Transmission range switch (left side of transmission)
• Twisted pair
• Underhood fuse- relay center
• Upshift ind
• Upshift ind (m/t only)
• Vehicle control module (left side of engine compt)
• Vehicle speed sensor (left side of transmission, left side of tran- sfer case w/ 4wd)
• Vehicle speed sensor (vss) adapter
• Voltmeter
• Vss
• Warning systems

6.5L

6.5L VIN F, Instrument Cluster Wiring Diagram (1 of 2) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Instrument Cluster Wiring Diagram (1 of 2) for GMC Suburban C1999 2500:

• (6 bulbs)
• Air bag ind
• Anti- lock brakes ind
• Anti-lock brakes system
• Anti-theft system
• Bat ind
• Brake ind
• Check gauges ind
• Check gauges lamp driver
• Daytime running lamps ind
• Dimming led
• Engine controls system
• Engine coolant temperature sensor (on top right front of engine, near thermostat housing)
• Exterior lights system
• Fuel gauge
• G117 (top rear of right cylinder head)
• G119 (right front of engine block)
• G134 (front top of engine)
• G202 (behind left side of dash)
• Generator
• Gnd
• Headlights system
• Hi beam ind
• Ign
• Illum
• Illumination
• Instrument cluster
• Interior lights system
• Left turn ind
• Low coolant ind
• Low coolant level indicator module (behind center of dash)
• Low coolant level sensor (in coolant reservoir, right side of engine compt)
• Oil press
• Oil pressure switch & sender (under intake manifold, center of engine)
• Pnk
• Prndl
• Prndl a
• Prndl b
• Prndl c
• Prndl parity
• Right turn ind
• S107
• S147
• S215
• S298
• Safety belt ind
• Security ind
• Service engine soon ind
• Service throttle soon ind
• Solid state
• Speed- ometer
• Starting/charging system
• Tach
• Tan
• Temp gauge
• Transmission range switch (left side of transmission)
• Volt- meter
• Wait to start ind
• Warning system
• Water in fuel ind
• Water-in fuel sensor (on fuel filter/ manager)

6.5L VIN F, Instrument Cluster Wiring Diagram (2 of 2) for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, Instrument Cluster Wiring Diagram (2 of 2) for GMC Suburban C1999 2500:

• (i/p harn, 16 cm into cluster breakout)
• 4wd a/t
• 4wd m/t & all 2wd
• A/t
• Accy
• Anti-lock brakes system
• Brake ind
• Brake pressure warning switch (on rear of ebcm casting)
• Brake psi
• Daytime running lamps module (behind left side of dash, taped to panel wiring harness)
• Dual fuel tanks
• Electronic brake control module (left side of engine compt)
• Eng 1 mini fuse 20a
• Engine controls system
• Engine controls system (fuel pump balance relay)
• Fuel gage sender (in front fuel tank)
• Fuel pump & sender
• Fuel pump balance module (inside left side of frame rail)
• G119 (right front of engine block)
• G134 (front top of engine)
• Gauges fuse 4 10a
• Hot in run or start
• Hot in run, bulb test or start
• I/p fuse block (under left side of dash)
• Ign e mini fuse 10a
• Ign sw
• Ignition switch
• Lock
• M/t
• Off
• Park brake warning switch (on parking brake pedal bracket)
• Pk brake
• Pnk
• Radio
• Run
• S103
• S107
• S115
• S211
• S213
• S215
• S315
• S317
• Secondary fuel gage sender (in rear fuel tank)
• Single fuel tank
• Start
• Trans fuse 20 10a
• Twisted pair
• Underhood fuse/relay center (left rear of engine compt)
• Vehicle speed sensor (left side of transmission, left side of transfer case w/ 4wd)
• Vehicle speed sensor (vss) adapter
• Vehicle speed sensor buffer (behind right side of dash)

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for GMC Suburban C1999 2500

List of elements for Courtesy Lamps Wiring Diagram for GMC Suburban C1999 2500:

• (crossbody harn, approx 22 cm from left door harn breakout)
• (i/p harn, approx 6 cm from i/p compt box lamp breakout) s208
• (w/ rke)
• Bat
• Braided ground strap
• Cargo door jamb switch (suburban/ utility only)
• Courtesy lamps
• Ctrl
• Ctsy fuse 3 20a
• Dome defeat
• Dome lamp defeat
• Door jamb
• Door lock control module (in front of left rear wheelwell)
• Front dome/ reading lamps
• G201 (right side of dash)
• G202 (behind left side of dash)
• G305 (right "b" pillar)
• Gages fuse 4 10a
• Gnd
• Headlamp & panel dimmer switch
• Horn fuse 20a
• Hot at all times
• Hot in run, bulb test or start
• I/p compart- ment box lamp
• I/p fuse block
• Ign sw
• Interior lamp control module (under center of dash)
• Lamp out
• Left
• Left front door courtesy lamp (if equipped)
• Left front door jamb switch
• Left i/p courtesy lamp
• Left illuminated vanity mirror
• Left rear door courtesy lamp (if equipped)
• Mirrors system
• Nca
• Overhead console lamps circuit
• Pnk
• Pnk a
• Pnk j
• Rear dome/ reading lamps (if equipped)
• Rear door jamb switch (if equipped)
• Remote control door lock receiver (behind center of dash)
• Right
• Right front door courtesy lamp (if equipped)
• Right front door jamb switch
• Right i/p courtesy lamp
• Right illuminated vanity mirror
• Right rear door courtesy lamp (if equipped)
• S113
• S204
• S209 (i/p harn, approx 13 cm from i/p compt box lamp breakout)
• S213
• S218
• S242
• S246
• S248
• S251
• S262 (crossbody harn, approx 19-25 cm from seat belt switch breakout)
• S312
• S316
• S410
• S417 (4 door) (2 door) (front to rear (front to body harn, rear body approx 20 cm harn, approx into crossbody 34 cm from front harn dome lamp breakout) breakout)
• S426
• Underhood fuse/relay center
• Underhood lamp
• W/ overhead console
• W/ rke
• W/o overhead console
• W/o rke

Instrument Illumination Wiring Diagram (1 of 2) for GMC Suburban C1999 2500

List of elements for Instrument Illumination Wiring Diagram (1 of 2) for GMC Suburban C1999 2500:

• (6) bulbs
• (behind left side of dash)
• (front to rear body harn, 5 cm from auxiliary hvac fan switch breakout)
• (i/p harn, near i/p cluster breakout) s217
• Audio alarm module (on convenience center)
• Automatic transfer case control switch (luxury) c1
• Automatic transfer cash select switch
• Auxiliary heater control switch (subur- ban/ utilitiy only)
• Base
• Cargo lamp switch (pickup only)
• Conven- ience center
• Daytime running lamp (drl)/ radio override switch
• Daytime running lamps (drl)/ radio override switch
• Display dim sig
• Fog lamp switch
• Front auxiliary hvac control lamp
• G131 (near thermostat housing)
• G201 (right side of dash)
• G202
• G305 (at right "b" pillar)
• Headlamp & panel dimmer switch
• Hot at all times
• Hvac control lamp
• I/p fuse block
• Illum fuse 14 10a
• Illumination
• Inflatable restaint i/p module switch
• Instrument cluster
• Liftgate release switch (subur- ban/ utilitiy only)
• Luxury
• Off
• Parade mode sw
• Park
• Park lps fuse 9 20a
• Pickup/ extended cab only
• Radio
• Rear auxiliary hvac control lamp
• Rear auxiliary hvac control switch
• Rear window wiper/ washer switch (subur- ban/ utilitiy only)
• Rheo- stat
• S204
• S215
• S216 (i/p harn, near i/p cluster breakout)
• S218
• S253 (cross- body harn, near i/p harn breakout)
• S259
• S307
• S310
• Suburban & utility only
• Transfer case shift illumination lamp
• Transfer case switch
• Z56 only

Instrument Illumination Wiring Diagram (2 of 2) for GMC Suburban C1999 2500

List of elements for Instrument Illumination Wiring Diagram (2 of 2) for GMC Suburban C1999 2500:

• (behind left side of dash)
• (crossbody harn, approx 6 cm in left door harn breakout)
• (floor console harn, 12 cm from cd player harn breakout) s333
• (right side of dash)
• Ash tray lamp
• Body control module (in center console)
• Exterior lights system
• G201
• G202
• G305 (right "b" pillar)
• Garage door opener lamp
• Headlamp & panel dimmer switch
• Hot at all times
• I/p fuse block
• Left front power window switch
• Left rear heated seat switch
• Left rear power window switch
• Off
• Parade mode sw
• Park
• Park lps fuse 9 20a
• Power outside rearview mirror switch
• Rear stereo controller
• Rear window lockout switch
• Rheo- stat
• Right front power window switch
• Right rear heated seat switch
• Right rear power window switch
• S210 (i/p harn, approx 12 cm from steering column harn breakout)
• S218
• S247
• S251
• S259
• S321
• S330
• S336
• S500
• S502 (left front door harn, near tweeter)

Overhead Console Lamps Wiring Diagram for GMC Suburban C1999 2500

List of elements for Overhead Console Lamps Wiring Diagram for GMC Suburban C1999 2500:

• (front to rear body harn, approx 34 cm from front dome lamp breakout) (2 door) s417
• (under center of dash) (w/o rke) interior lamp control module
• Courtesy lamps
• Courtesy lamps circuit
• Ctsy fuse 3 20a
• Front dome/ reading lamps
• G202 (behind left side of dash)
• G305 (right "b" pillar)
• Headlamp & panel dimmer switch
• Hot at all times
• I/p fuse block
• Int lamp output
• Int lamp output c1
• Overhead console reading lamps
• Rear dome/ reading lamps
• Remote control door lock receiver (w/rke) (behind center of dash)
• S204
• S209 (i/p harn, approx 13 cm from i/p compt lamp breakout)
• S246 (crossbody harn, approx 22 cm from left door harn breakout)
• S320
• S321
• S410
• S426

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 6) for GMC Suburban C1999 2500

List of elements for Power Distribution Wiring Diagram (1 of 6) for GMC Suburban C1999 2500:

• (auxiliary a/c harn, near blower motor relays)
• (crossbody harn, approx 22 cm from left door harness breakout)
• (diesel-eng harn, 6.5cm from ebcm breakout gasoline-eng harn, 12cm from ebcm breakout)
• (eng harn, approx 19cm from electronic brake control module breakout) s113
• (eng harn, near ebcm breakout)
• (i/p harn, near steering column harness breakout) s205
• (overhead console harn, between garage door opener & reading lamp)
• (stud a)
• (stud b)
• (vanity mirror jumper harn, approx 4 cm from inside rearview mirror)
• 175a
• 7.4l
• A nca
• A/c comp fuse 10a
• A/c compressor clutch relay
• Abs fuse 4 60a
• Aux fan fuse 30a
• Aux fuse 22 20a
• Aux pwr auto headlap fuse 22 20a
• Auxiliary cooling fan relay
• Auxiliary high blower motor relay
• Auxiliary low blower motor relay
• Auxiliary medium blower motor relay
• Auxiliary roof lamp relay
• Auxiliary roof lamp switch
• B red
• Blower fuse 3 50a
• Brake lamp relay
• C13
• Camp/trail fuse 30a
• Cargo lamp switch
• Convenience center
• Ctsy fuse 3 20a
• D13
• Daytime running lamps relay
• Diode
• Drl/fog fuse 15 20a
• Dual battery
• Ecm-b fuse 20a
• Electronic brake control module
• Evo/ passlock module
• Fog lamp relay
• Front dome lamp
• Front dome lamps
• Fuel pump oil pressure switch and sender
• Fuel pump relay
• Fusible link (10 ga-rust)
• Garage door opener
• Generator (base)
• Generator (uplevel)
• Headlamp & panel dimmer switch
• Headlamp and panel dimmer switch
• Headlamp control module
• Heater and a/c control switch
• Heater mirror relay
• High blower motor relay
• Horn fuse 20a
• Horn relay
• Htd mir fuse 10a
• I/p compartment box lamp
• I/p fuse block
• Instrument cluster (police package)
• Interior lamp control module
• Left battery (diesel)
• Left courtesy lamp
• Left front door courtesy lamp
• Left rear door courtesy lamp
• Left vanity mirror
• Lighting fuse 8 50a
• Mega fuse block
• Overhead console reading lamps
• Pickup only
• Pk lps fuse 9 20a
• Power outside rearview mirror switch
• Powertrain control module (diesel)
• Radio
• Radio batt fuse 19 10a
• Rear dome lamps
• Red
• Remote battery stud
• Right battery
• Right courtesy lamp
• Right front door courtesy lamp
• Right rear door courtesy lamp
• Right vanity mirror
• Rr defog fuse 30a
• S101
• S110
• S242 (i/p harn, 12cm from inflatable restraint switch breakout)
• S248 (crossbody harn, approx 35 cm from left front door harn breakout)
• S278
• S312 s312
• S401
• S426
• S443
• Security/ strg fuse 21 20a
• Seo fuse 30a
• Single battery (base)
• Single battery (uplevel)
• Spare power source
• Spotlamp (police package)
• Starter motor solenoid
• Stop fuse 2 50a
• Suburban/ utility
• To fusible link (diagram 5 of 6)
• To megafuse (diagram 6 of 6)
• To underhood fuse-relay center (diagram 2 of 6)
• Underhood fuse- relay center
• Underhood fuse-relay center
• Underhood lamp
• Upper level
• Vehicle control module (gasoline)
• W/o rke

Power Distribution Wiring Diagram (2 of 6) for GMC Suburban C1999 2500

List of elements for Power Distribution Wiring Diagram (2 of 6) for GMC Suburban C1999 2500:

• (2dr w/ rke & 4dr)
• (crossbody harn, 20 cm from convenience center breakout) s255
• (crossbody harn, approx 19 cm from conenience center)
• (front-to-rear body harn, approx 6 cm from convenience center breakout)
• (i/p harn, 12cm from steering column harness breakout) s200
• (i/p harn, 4cm from auxiliary power outlet breakout)
• (i/p harn, 4cm from steering column harness breakout)
• (i/p harn, approx 10 cm into steering column harn breakout)
• (i/p harn, left rear of engine compartment)
• (power lumbar seat jumper harn, approx 13 cm from right power seat breakout)
• (upper level)
• (utility only)
• 30a (others)
• 8cm from i/p cluster breakout) s264
• Audio alarm module
• Audio amplifier
• Automatic
• Automatic transfer case
• Automatic transfer case control module
• Aux/pwr fuse 7 25a
• Base
• Base cargo door
• Base cargo doors/upper level liftgate
• Base liftgate/ upper level cargo doors
• Battery fuse 7 50a
• Cargo door lock relay
• Cig ltr fuse 13 20a
• Cigar lighter
• Convenience center
• D14
• D15
• Data link connector
• Door lock control module
• Door lock relay
• Electric
• From underhood fuse-relay center (diagram 1 of 6)
• Front auxiliary power connector
• G202 (left side of dash)
• I/p fuse block
• Instrument cluster
• Left front door lock switch
• Left front power lumbar seat switch
• Left power seat adjuster switch
• Liftgate release relay
• Liftgate release switch
• Non- base
• Others
• Pickup
• Police package
• Power amplifier relay (suburban)
• Pwr-accy circuit breaker (regular 20a cab/extended cab)
• Radio
• Radio batt fuse 19 10a
• Rear auxiliary power connector
• Rear console auxiliary power connector
• Rear door lock switch
• Red
• Remote control door lock receiver
• Right front door lock switch
• Right front power lumbar seat switch
• Right front power seat umbar switch
• Right lumbar power seat switch
• Right power seat adjuster switch
• S212
• S218
• S236
• S237
• S255
• S256
• S272
• S299
• S300
• S434
• Stop lamp switch
• Stop/haz fuse 1 20a
• Suburban/ utility
• T case fuse 2 20a
• To seats fuse (diagram 3 of 6)
• Transfer case control module
• Turn/ hazard switch
• Underhood fuse-relay center
• Upper level
• Upper levle
• Vehicle interface unit
• W/ rke
• W/bench seat
• W/o rke

Power Distribution Wiring Diagram (3 of 6) for GMC Suburban C1999 2500

List of elements for Power Distribution Wiring Diagram (3 of 6) for GMC Suburban C1999 2500:

• (a/t)
• (battery harn, red
• (floor console harn, 33 cm heated seat switch breakout)
• (gas) (diesel)
• (i/p harn, 12cm from steering column harn breakout) pnk
• (i/p harn, 22 cm before radio harn breakout) s292
• (i/p harn, 4 cm from steering column harn breakout) s213
• (i/p harn, 8 cm from automatic transfer case module breakout)
• (i/p harn, approx 8 cm from steering column harn breakout) s201
• (inside left front door harn at breakout to window motor regulator)
• (m/t)
• (w/o rke) (w/ rke)
• A j
• A/t
• Acc
• Air bag fuse 10 10a
• At left side of eng compt) s167
• Audio alarm module
• Backup lamp switch
• Body control module
• C210
• Clutch pedal position switch
• Convenience center
• Crank fuse 8 10a
• Cross body harn, 8cm from convenience center breakout)
• Daytime running lamps module
• Daytime running lamps relay
• Drl/radio override (police package)
• Electrochromic rearview mirror w/ compass
• Evo/ passlock module
• From ignition switch (diagram 3 of 6)
• From underhood o
• Fuse-relay center (diagram 2 0f 6)
• Gauges fuse 4 10a
• Headlamp control module
• Headlamp/ panel dimmer switch
• I/p fuse block
• Ign a fuse 6 40a 50a
• Ign b fuse 5 50a
• Ignition switch
• Inflatable restraint i/p module switch (pickup)
• Inflatable restraint sensing and diagnostic module
• Instrument cluster
• Interior lamp control module or remote control door lock receiver
• Lock
• Low coolant level indicator module (diesel)
• M/t
• Off
• Others
• Park/neutral position switch
• Pnk
• Pnk k
• Pnk s207
• Power window master switch
• Pwr wdo circuit breaker 30a
• Radio
• Radio fuse 17 10a
• Rear stereo controller
• Rear window lockout switch (4-dr)
• Rear window wiper/washer switch (suburban/utility)
• Red
• Right front power window switch (2 dr & utility)
• Rr wiper fuse 23 25a
• Run
• S266
• S290
• S501
• Start
• Starter relay
• To s206 (diagram 5 of 6)
• To s207 (diagram 3 of 6)
• To s285 (diagram 6 of 6)
• To seats fuse (diagram 5 of 6)
• To underhood fuse-relay center (diagram 4 of 6)
• Trans fuse 20 10a
• Trans- mission controls
• Transfer case control module (selectable 4wd electric shift)
• Transfer case select switch
• Turn b/u fuse 16 20a
• Turn signal switch
• Underhood fuse-relay center
• Upper level
• Vehicle interface unit
• Vehicle speed sensor buffer (diesel)
• Windshield wiper motor module
• Windshield wiper/ washer switch
• Wiper fuse 11 25a

Power Distribution Wiring Diagram (4 of 6) for GMC Suburban C1999 2500

List of elements for Power Distribution Wiring Diagram (4 of 6) for GMC Suburban C1999 2500:

• (eng harn, 12 cm from fuel injector breakout)
• (eng harn, 30cm from ebcm breakout)
• (eng harn, approx 12 cm from ignition coil breakout)
• (eng harn, approx 4 cm from i/p harn breakout) s166
• (eng harn, approx 5 cm from backup lamp switch harn breakout)
• (eng harn, approx 8 cm from egr breakout)
• (eng harn, s146
• (in injector harn jumper)
• (oxygen sensor jumper harn, approx 19cm into harn)
• (taillamp extension harn, approx 17 cm from fuel pump
• 26 cm from ebcm breakout)
• 5.0l, 5.7l
• 6.5l pnk
• 7.4l
• 7.4l w/ california emissions
• A/c clutch relay
• A/c compressor clutch relay
• Air intake recirculation relay (5.7l)
• Air relay
• Balance module breakout) s315
• C11
• C12
• Camshaft position sensor
• Crank- shaft position sensor
• Diesel
• Ecm 1 fuse 20a
• Egr boost solenoid
• Egr linear pwm valve solenoid
• Egr solenoid
• Eng-1 fuse 20a
• Engine shutoff solenoid
• Evaporative emission canister vent
• Evaporative emissions canister purge solenoid valve
• From splice s207 k (diagram 3 of 6)
• Fuel heater
• Fuel injector
• Fuel pump balance module
• Fuel pump balance relay
• Fuel solenoid driver
• Gasoline
• Glow plug relay
• Heated oxygen sensor (5.ol: bank 1 sensor 2, 5.7l below 8600 gvw: bank 2 sensor 2, 5.7l over 8600 gvw & 7.4l: bank 1 sensor 2)
• Heated oxygen sensor (5.ol: bank 1 sensor 3, 5.7l below 8600 gvw: bank 1 sensor 2, 5.7l over 8600 gvw & 7.4l: bank 2 sensor 2)
• Heated oxygen sensor bank 1 sensor 1
• Heated oxygen sensor bank 2 sensor 1
• Ign e fuse 10a
• Ignition coil
• Ignition control module
• Mass air flow sensor
• Mass airflow sensor
• Others
• Pnk
• Powertrain control module
• S104
• S108
• S148
• S154
• S155
• S161
• S190
• Underhood fuse-relay center
• Vehicle control module
• Water-in- fuel sensor

Power Distribution Wiring Diagram (5 of 6) for GMC Suburban C1999 2500

List of elements for Power Distribution Wiring Diagram (5 of 6) for GMC Suburban C1999 2500:

• (auxiliary a/c harn, 17cm from blower motor relays)
• (crossbody harn, 27 cm from left rear heated seat breakout)
• (crossbody harn, approx 25 cm from sdm breakout)
• (eng harn, 7cm from ebcm) breakout)
• (floor console harn, approx 28 cm from left heated switch breakout) s332
• (hvac harn, approx 4 cm from recirculation door breakout)
• (i/p harn, 6cm from steering column harness breakout)
• (i/p harn, approx 7cm from inflatable restraint switch breakout) s268
• (i/p harn, approx 8 cm from steering column breakout)
• (others)
• (rear hvac control harn, approx 5 cm from hvac logic module breakout) s308
• (tailamp extension harn, appr0x 10 cm from breakout to ground at left side frame rail, near crossmember)
• (upper level)
• 4wd fuse 24 25a
• A13
• Automatic transfer case control module
• Automatic transfer case only
• Automatic transfer case select switch
• Auxiliary battery
• Auxiliary battery relay (left rear of engine compt)
• Auxiliary heater and a/c control logic module
• Auxiliary heater and a/c control module (front)
• Auxiliary heater and a/c control module (rear)
• Auxiliary high blower motor relay
• Auxiliary low blower motor relay
• Auxiliary medium blower motor relay
• Auxiliary mode door motor
• Auxiliary temperature door motor
• Brake fuse 18 10a
• Convenience center
• Crossbody harn, 20 cm from sdm breakout)
• Cruise control module (gas only)
• Cruise control switch
• Cruise fuse 6 10a
• Diesel
• E10
• Electronic brake control module
• From ignition switch (diagram 3 of 6)
• From underhood e fuse-relay center (diagram 3 of 6)
• From underhood fuse-relay center (diagram 1 of 6)
• Front axle actuator
• Front heated seats fuse 20a
• Fusible link
• G100 (left front fender)
• Gas, base models
• Gas, others models
• Htr-a/c fuse 12 25a
• Hvac control module
• I/p fuse block
• Left front heated seat module
• Left front heated seat switch
• Left rear heated seat module
• Left rear heated seat switch
• Mode door motor
• Rear heated seats fuse 20a
• Rear heater only
• Rear heater w/ cargo doors
• Rear heater w/ lift- gate
• Recirculation door motor
• Red
• Right front heated seat module
• Right front heated seat switch
• Right rear heated seat module
• Right rear heated seat switch
• Rr hvac fuse 5 10a
• S151
• S206
• S233
• S235
• S238
• S243
• S281
• S324
• S326
• S400
• Seats fuse 40a
• Spare power source
• Stop lamp switch
• Suburban utility only
• Temperature door motor
• Transfer case switch (k3500)
• Underhood fuse-relay center
• Upper level
• Vehicle control module (gas only)
• W/ rear defrost

Power Distribution Wiring Diagram (6 of 6) for GMC Suburban C1999 2500

List of elements for Power Distribution Wiring Diagram (6 of 6) for GMC Suburban C1999 2500:

• (battery harn, left side of engine compartment) s167
• (in auxiliary power center harness) s285
• (in auxiliary power center harness) s286
• (in auxiliary power center harness) s287
• 30a
• 6j1
• Auxiliary power center (center of dash)
• Cicuit breaker 15a
• Cicuit breaker 25a
• Customer installed options
• From pwr wdo circuit breaker (diagram 3 of 6)
• From right battery (diagram 1 of 6)
• Fuse
• Fuse 175a
• Fuse 60a
• Fuse b 60a
• Fuse block
• Generator
• Mega fuse
• Pnk
• Police package
• Red
• Relay a
• Relay b
• Right battery
• S168
• S288
• S289
• Z56

POWER DOOR LOCKS

Door Lock Wiring Diagram for GMC Suburban C1999 2500

List of elements for Door Lock Wiring Diagram for GMC Suburban C1999 2500:

• (crossbody harn, near seat belt switch breakout) s262
• (crossbody harn, under left side of dash) s258
• (crossbody harness, near door lock relay breakout) s256
• (front to rear harness, near dome lamp harn breakout) s434
• (front to rear harness, near rear window harn breakout) s431
• (i/p harn, 6 cm from glove box lamp breakout)
• 2 door 4 door
• 4 door
• Batt (b+)
• C210
• Cig ltr fuse 13 20a
• Convenience center (left side of dash)
• Door jamb sw
• Door lock control module (front of left rear wheelhouse)
• Door lock relay (under center of dash)
• G201 (right side of dash)
• G202 (behind left side of dash)
• G305 (right "b" pillar)
• Ground
• Hot at all times
• I/p fuse block (left side of dash)
• Left front door jamb switch
• Left front door lock actuator
• Left front door lock switch
• Left rear door jamb switch
• Left rear door lock actuator
• Lock
• Lock sig
• Pwr accy circuit breaker 30a
• Rear cargo door lock actuator (cargo doors)
• Rear door jamb switch
• Rear door lock switch (cargo doors)
• Right front door jamb switch
• Right front door lock actuator
• Right front door lock switch
• Right rear cargo door contactor (right rear door jamb)
• Right rear door jamb switch
• Right rear door lock actuator
• Rr door sw
• S204
• S208
• S218
• S255
• S257 (crossbody harness, near door lock relay harness breakout)
• S259
• S260 (crossbody harness, 6 cm from seat belt switch breakout)
• S261 (crossbody harness, 12 cm from seat belt switch breakout)
• S264
• S296
• S410
• S432 (front to rear harness, near left rear speaker harness breakout)
• Tan
• Unlock
• Unlock sig

Keyless Entry Wiring Diagram for GMC Suburban C1999 2500

List of elements for Keyless Entry Wiring Diagram for GMC Suburban C1999 2500:

• (cross body harness, 6cm from seat belt switch breakout)
• (crossbody harn, near seat belt switch breakout) s262
• (crossbody harn, under left side of dash) s258
• (front to rear harness, near rear window harn breakout) s431
• (i/p harn, 6 cm from glove box lamp breakout)
• (regular/extended cab) (except regular/extended cab)
• (utility w/ cargo doors)
• 1576 (or 56)
• 2 door
• 4 door
• 640 (or 540)
• Batt (b+)
• C210
• Cargo door jamb switch
• Cargo door lock switch (w/ cargo doors)
• Cig ltr fuse 13 20a
• Convenience center (left side of dash)
• Data link connector (under left side of dash)
• Dome lamps
• Dome lmp off
• Door jamb sw
• Door lock control module (front of left rear wheelwell)
• Door lock relay (under center of dash, near remote control door lock receiver)
• Driver dr unlk
• G201 (behind right side of dash)
• G201 (right side of dash)
• G305 (right "b" pillar)
• Gauges fuse 4 10a
• Ground
• Horn ctrl
• Horns system
• Hot at all times
• Hot in run, bulb test or start
• I/p fuse block (left side of dash)
• Ignition
• Interior lamps system
• Left front door jamb switch
• Left front door lock actuator
• Left front door lock switch
• Left rear door jamb switch
• Left rear door lock actuator
• Lock
• Lock out
• Lock sig
• Pass drs unlk
• Pnk
• Program sig
• Pwr accy circuit breaker 20a 30a
• Rear cargo door lock actuator (cargo doors)
• Remote control door lock receiver (behind center of dash)
• Right front door jamb switch
• Right front door lock actuator
• Right front door lock switch
• Right rear cargo door contactor (right rear door jamb)
• Right rear door jamb switch
• Right rear door lock actuator
• Rr door sw
• Rr lftgte unlk
• S204
• S208
• S213
• S218
• S251
• S255
• S256
• S257 (crossbody harness, near door lock relay harness breakout)
• S259
• S261 (crossbody harness, 7 cm from seat belt switch harn breakout)
• S264 (suburban/ utility)
• S296 (luxury)
• S410
• S432 (front to rear harness, near left rear speaker harness breakout)
• S434
• Tan
• Trunk, tail- gate, fuel doors system
• Unlock
• Unlock out
• Unlock sig
• Utility w/ rear cargo doors
• Utility w/ rear liftgate
• W/ cargo doors
• W/ liftgate
• W/ power windows
• W/o power windows

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for GMC Suburban C1999 2500

List of elements for Electrochromic Mirror Wiring Diagram for GMC Suburban C1999 2500:

• (behind left side of dash) g202
• Ambient sensor (windshield side)
• Automatic transmission
• Backup lamp switch (on left side of trans- mission)
• Backup lamp switch (part of park/neutral position switch) (on left side center of transmission)
• Breakout) s278
• C/m
• C1 f
• Exterior lights system
• Gauges fuse 4 10a
• Ground
• Headlamp sensor (mirror side)
• Hot in run or start
• I/p fuse block (under left side of dash)
• Inside automatic day-night mirror
• Left outside automatic day-night mirror
• Manual transmission
• Mirror input
• Mirrors switch
• Nca
• Note
• Off
• On indicator control
• Pnk
• Power distribution system
• Reset to daytime high reflectivity in reverse
• Right outside automatic day-night mirror
• S160 (see note)
• S213
• S279 (crossbody harness, approx 38 cm from convenience center pnk breakout)
• S316
• Si60: (4.3l) (engine harness, approximately 21 cm from egr valve breakout) s160: (5.0l & 5.7l) (engine harness, approximately 23 cm from ebcm breakout) s160: (6.5l) (engine harness, approximately 17 cm from ebcm breakout) s160: (7.4l) (engine harness approximately 28 cm from fuel injector breakout)
• Solid state
• T/m
• Temperature sensor (in engine compartment, near lower radiator support)
• Turn b/u fuse 16 20a

Power Mirrors Wiring Diagram for GMC Suburban C1999 2500

List of elements for Power Mirrors Wiring Diagram for GMC Suburban C1999 2500:

• (inside left front door harness)
• (inside right front door harness)
• (right side of dash) g201
• Ctsy fuse 3 20a
• Down
• Hot at all times
• I/p fuse block
• Illum- nation lamp
• Interior lights system
• Left
• Left power outside rearview mirror
• Left/ right motor
• Power outside rearview mirror switch
• Red
• Right
• Right power outside rearview mirror
• S248
• S251
• S503
• S602
• Up/ down motor

POWER SEATS

6-Way Power Seat Wiring Diagram for GMC Suburban C1999 2500

List of elements for 6-Way Power Seat Wiring Diagram for GMC Suburban C1999 2500:

• (regular/extended cab) (except regular extended cab)
• (right side of dash)
• Back
• Forward/ rearward motor
• Front dn
• Front tilt motor
• Front up
• Fwd
• G201
• Hot at all times
• I/p fuse block
• Left power seat adjuster switch
• Pwr-accy circuit breaker 20a 30a
• Rear dn
• Rear tilt motor
• Rear up
• Right power seat adjuster switch
• S227
• S228
• S255
• Tan

Front Seat Heater Wiring Diagram for GMC Suburban C1999 2500

List of elements for Front Seat Heater Wiring Diagram for GMC Suburban C1999 2500:

• (cross body harn, left side of dash, near convenience center)
• (left heated seat harn, near heated seat control module breakout)
• (not used)
• Batt
• C236
• Convenience center
• Front heated seats fuse 20a
• G201 (right side of dash)
• Gnd
• Heated seat sw sig
• High/low sig
• Hot at all time
• Hot in run
• I/p fuse block
• Indicator lmp feed
• Left front heated seat module (under left front power seat)
• Left front heated seat switch
• Left front seat back element
• Left front seat cushion
• Left front seat cushion element
• Left front seat temper- ature sensor
• Off
• Right front heated seat module (under right front power seat)
• Right front heated seat switch
• Right front seat back element
• Right front seat bealt switch
• Right front seat cushion
• Right front seat cushion element
• Right front seat temper- ature sensor
• Rr hvac fuse 5 10a
• S227
• S233
• S238
• S259
• S273
• S274
• S277
• S278
• Sig enable
• Underhood fuse/relay center

Lumbar Wiring Diagram, with Bucket Seat for GMC Suburban C1999 2500

List of elements for Lumbar Wiring Diagram, with Bucket Seat for GMC Suburban C1999 2500:

• (w/ regular/extended cab) (except regular extended cab)
• C210 c
• Convenience center
• G201 (right side of dash)
• Hot at all times
• I/p fuse block
• Left front power lumbar seat switch
• Left front power lumbar support motor
• Left lumbar solenoid
• Pwr-accy circuit breaker 20a 30a
• Right front power lumbar seat switch
• Right front power lumbar support motor
• Right lumbar solenoid
• S227
• S228
• S237
• S241
• S259
• Tan

Lumbar Wiring Diagram, without Bucket Seat for GMC Suburban C1999 2500

List of elements for Lumbar Wiring Diagram, without Bucket Seat for GMC Suburban C1999 2500:

• C210 b
• Cig ltr fuse 13 20a
• Convenience center
• G201 (right side of dash)
• Hot at all times
• I/p fuse block
• Left front power lumbar seat switch
• Left front power lumbar support motor
• Left lumbar solenoid
• Red
• Right front power lumbar seat switch
• Right front power lumbar support motor
• Right lumbar solenoid
• S227
• S228
• S256
• S259
• S264 (suburban utility only)
• Tan
• W/ split bench seat
• W/o split bench seat

POWER WINDOWS

Power Window Wiring Diagram, 4 Door for GMC Suburban C1999 2500

List of elements for Power Window Wiring Diagram, 4 Door for GMC Suburban C1999 2500:

• Convenience center (under left side of dash)
• Down
• G201 (right side of dash)
• Headlamp & panel dimmer switch
• Hot at all times
• Hot in run
• I/p fuse block (under left side of dash)
• Left front
• Left front power window master switch
• Left front window motor
• Left rear
• Left rear window motor
• Left rear window switch
• Pk lps fuse 20a
• Pwr wdo circuit breaker 30a
• Right front
• Right front window motor
• Right front window switch
• Right rear
• Right rear window motor
• Right rear window switch
• S247 (crossbody harn, approx 6 cm into left door harn breakout)
• S251
• S259
• S263
• S500
• S501
• S502 (inside left front door harness, approx 4 cm from tweeter breakout)
• Solid state
• Tan
• Window lockout switch

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for GMC Suburban C1999 2500

List of elements for Shift Interlock Wiring Diagram for GMC Suburban C1999 2500:

• Automatic transmission shift lock control (btsi) solenoid (right side of steering column)
• G202 (behind left side of dash)
• Hot in run or start
• I/p fuse block
• Park/ neutral position switch (left side of transmission)
• Pnk
• S204
• Transfer case control module (under dash on steering column support bracket)
• Turn/ hazard switch
• Turn/bu fuse 16 20a
• W/ electric shift transfer case

STARTING/CHARGING

Charging Wiring Diagram for GMC Suburban C1999 2500

List of elements for Charging Wiring Diagram for GMC Suburban C1999 2500:

• (generator jumper harn, near right battery)
• 100a b
• 100a/105a b
• 124a l
• 175a
• All others
• Charge indicator
• Fusible link (10 ga -rust)
• G100 (front of left front fender)
• G101 (right front wheelhouse)
• G119 (gasoline) g110 (diesel) (diesel - left front of intake manifold) (gas - front of engine)
• Gauges fuse 4 10a
• Generator
• Generator (w/ dual generators)
• Hot in run or start
• I/p fuse block (under left side of dash)
• Instrument cluster
• Left battery (diesel)
• Mega fuse block (right front of engine compt, near battery)
• Pnk
• Power distribution system
• Red
• Right battery
• S213
• Uplevel/ enhanced

Starting Wiring Diagram for GMC Suburban C1999 2500

List of elements for Starting Wiring Diagram for GMC Suburban C1999 2500:

• (left rear of engine compt) underhood fuse/relay center
• 175a
• A/t
• Accy
• Bulb test
• Clutch pedal position switch (top of clutch pedal)
• Crank fuse 8 10a
• Diesel
• Except diesel (base)
• Except diesel (uplevel)
• G100 (front of left front fender)
• G101 (right front wheelhouse)
• G119 (gasoline) g110 (diesel) (gas-right front of engine diesel-left front of intake manifold)
• G119 (right front off engine)
• Hold- in coil
• I/p fuse block (left side of dash)
• Ign a fuse 6 40a
• Ignition switch
• Left battery (diesel)
• Lock
• M/t
• Mega fuse block (right front of engine compt, near battery)
• Nca
• Off
• Power distribution system
• Pull- in coil
• Red
• Remote battery stud
• Right battery
• Run
• S107
• Start
• Starter motor
• Starter relay
• Starter solenoid
• Transmission range switch (left side of transmission)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for GMC Suburban C1999 2500

List of elements for Supplemental Restraint Wiring Diagram for GMC Suburban C1999 2500:

• (sir harn, 35 cm from mobile communications system wiring harn breakout)
• (under left side of dash) data link connector (dlc)
• Air bag fuse 10 10a
• Air bag ind
• Bar
• Cluster
• Data line
• Driver high
• Driver low
• G202 (behind left side of dash)
• Gauges fuse 4 10a
• Ground
• Hot in run or start
• Hot w/ headlamp switch in park or headlamp
• I/p fuse block (under left side of dash)
• Ignition
• Illum fuse 14 10a
• Indicator lamp
• Inflatable restraint front end discriminating sensor (under front outside center of radiator)
• Inflatable restraint i/p module (right side of dash)
• Inflatable restraint i/p module switch (pickup only)
• Inflatable restraint sensing and diagnostic module (under driver's seat carpet)
• Inflatable restraint steering wheel module (steering wheel)
• Inflatable restraint steering wheel module coil
• Instrument
• Interior lights (dimmer swtch)
• Navigation system
• Pass disable
• Pass enable
• Pass high
• Pass low
• Pnk
• S213 (dash harn, 4 cm from steering column harn breakout)
• S217 (dash harn, 16 cm from instrument cluster breakout)
• S218 (dash harn, near 16 cm from dlc breakout)
• S282
• Seat belt sig
• Sensor feed
• Shorting
• Shorting bar
• Solid state
• Tan
• Warning systems (seat belt switch)

TRANSMISSION

5.7L

5.7L VIN R, A/T Wiring Diagram, 4L60-E for GMC Suburban C1999 2500

List of elements for 5.7L VIN R, A/T Wiring Diagram, 4L60-E for GMC Suburban C1999 2500:

• (dash harn, 20 cm from breakout to inflatable restraint sw)
• (engine harn, 16 cm from egr breakout)
• (engine harn, 6.5 cm from breakout to ebcm)
• (on brake pedal bracket) stoplamp switch
• 1-2 shift sol
• 1-2 shift solenoid
• 2-3 shift sol
• 2-3 shift solenoid
• 2wd
• 3-2 ctrl solenoid
• 3-2 downshift sol
• 4wd
• 4wd circuit (transfer case & axle switches)
• 4wd low signal in
• 5v reference
• Anti-lock brakes system
• Automatic transmission (4l60-e)
• Battery in
• Brake fuse 18 10a
• Brake switch input
• Breakout to egr valve)
• Cruise control
• D3, d2
• D4, d2
• Data class ii
• Data link connector (under left side of dash)
• Ecm 1 fuse 20a
• Ecm b fuse 20a
• Ect sens input
• Electronic brake control module
• Engine controls
• Engine coolant temperature sensor (top right front of engine)
• Fluid temp sensor
• Front wheel lock
• Fuel injectors, ignition control moudule & ignition coil
• Fuel pump & oil press switch/ sender & fuel pump relay
• G120 (right rear of cylinder head)
• Gauges fuse 4 10a
• Hot at all times
• Hot in off, run or start
• Hot in run
• Hot in run or start
• I/p fuse block (under left side of dash)
• Ignition in
• Inline gender adaptor
• Instrument cluster
• Malfunction indicator lamp
• Mil control
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Press ctrl solenoid
• Range signal "a"
• Range signal "b"
• Range signal "c"
• Red
• Rev, lo
• S101
• S103
• S150 (engine harn, 13 cm from breakout to ebcm)
• S151
• S152
• S161
• S213
• S222
• S231
• Sensor ground
• Sensor return
• Tan
• Tcc pwm sol
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tcc/abs/ cruise switch
• Throttle position sensor (mounted to side of throttle body)
• Tp sens input
• Trans fuse 20 10a
• Trans range pressure switch assembly
• Trans temp sig in
• Transfer case circuit
• Underhood fuse/relay center (left rear of engine compt)
• Vehicle control module (left side of engine compt)
• Vehicle speed sensor (left side of transmission-2wd) (left side of transfer case-4wd)
• Vss hi (signal)
• Vss lo (ground)

6.5L

6.5L VIN F, A/T Wiring Diagram, 4L80-E for GMC Suburban C1999 2500

List of elements for 6.5L VIN F, A/T Wiring Diagram, 4L80-E for GMC Suburban C1999 2500:

• (dash harn, 16 cm from cluster breakout)
• (engine harn, 4 cm fromt breakout to cluster)
• (on brake pedal bracket) stoplamp switch
• (top rear of right cyl head)
• 1-2 shift sol
• 1-2 shift solenoid
• 2-3 shift sol
• 2-3 shift solenoid
• 2wd
• 4wd
• 4wd sig
• A/t iss sens hi
• A/t iss sens in
• A/t iss sens lo
• A/t iss sensor
• A12
• Accelerator pedal position module (part of accelerator pedal)
• App 1 5v ref
• App 1 signal in
• App 2 5v ref
• App 2 signal in
• App 3 5v ref
• App 3 signal in
• Automatic transmission (4l80-e)
• Automatic transmission input shaft speed sensor (left front of transmission)
• B10
• B12
• Battery in
• Brake fuse 18 10a
• Brake switch in
• C11
• C12
• C13
• C14
• C15
• Class ii data
• D11
• D12
• D13
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm 1 fuse 20a
• Ecm b fuse 20a
• Ect sensor in
• Electronic brake control module
• Engine controls system
• Engine coolant temperature sensor (near thermostat housing)
• Engine shutoff solenoid, fuel solenoid
• Exterior lights
• From breakout to steering column)
• Fuel pump & oil press switch/ sender & fuel pump relay
• G117
• Gauges fuse 4 10a
• Ground
• Hot at all times
• Hot in run
• Hot in run or start
• I/p fuse block (under left side of dash)
• Ignition in
• Inline gender adaptor
• Instrument cluster
• Malfunction indicator lamp
• Mil control
• Pcm ground
• Pcs sol hi out
• Pcs sol lo out
• Pnk
• Power
• Powertrain control module (right side of dash near blower motor)
• Press ctrl solenoid
• Red
• Rev, lo
• S101
• S103
• S140
• S150 (engine harn, 13 cm from breakout to ebcm)
• S152
• S166
• S170
• S211
• S213
• S215
• S299
• Sensor ground
• Stop/haz fuse 1 20a
• Stoplamp switch
• Tan
• Tcc pwm sol
• Tcc pwm solenoid
• Tft sensor in
• Trans fluid temp sensor
• Trans fuse 20 20a
• Trans range
• Trans range "a"
• Trans range "b"
• Trans range "c"
• Trans range pressure switch assembly
• Transfer case circuit
• Turn/ hazard switch & chime module
• Underhood fuse/relay center (left rear of engine compt)
• Vehicle speed sensor (left side of transmission-2wd left side of transfer case-4wd)
• Vehicle speed sensor buffer (right side of dash)
• Vss hi (signal)
• Vss in
• Vss lo (ground)
• Vss out

TRUNK, TAILGATE, FUEL DOOR

Rear Glass Release Wiring Diagram for GMC Suburban C1999 2500

List of elements for Rear Glass Release Wiring Diagram for GMC Suburban C1999 2500:

• C210
• Cig ltr fuse 13 20a
• Convenience center (under left side of dash)
• G119 (right front of engine block)
• Hot at all times
• I/p fuse block
• Interior lights system
• Liftgate release motor
• Liftgate release switch
• Liftgate unlock
• Park/ neutral position switch (left side center of transmission)
• Remote control door lock receiver (behind center of dash)
• S162 (gasoline) s107 (diesel)
• S264
• S265 (crossbody harn, approx 8cm from left door breakout)
• W/ rke

WARNING SYSTEMS

Warning System Wiring Diagrams, Base for GMC Suburban C1999 2500

List of elements for Warning System Wiring Diagrams, Base for GMC Suburban C1999 2500:

• (behind left side of dash)
• (near thermostat housing)
• (opens with belt buckled)
• Audio alarm module (on convenience center)
• Diesel
• Fasten belts out
• G119
• G134 (front top of engine)
• G134 (right top center of cylinder head)
• G201 (right side of dash)
• G202
• Gas
• Gauges fuse 4 10a
• Ground
• Hot at all times
• Hot in park or headlight
• Hot in run, bulb test, or start
• I/p fuse block (under left side of dash)
• Ignition on input
• Illum fuse 14 10a
• Instru- ment cluster
• Key-in warning
• Key-in warning buzzer switch (left side of steering column)
• Left front door jamb switch
• Lights on input
• Pnk
• Power input
• S103
• S204
• S213
• S215
• S217
• S259
• S298
• S299
• Safety belts indicator
• Seat belt input
• Seat belt switch (on driver's seat belt buckle)
• Stop/haz fuse 1 20a
• Tan

Warning System Wiring Diagrams, Luxury & Performance for GMC Suburban C1999 2500

List of elements for Warning System Wiring Diagrams, Luxury & Performance for GMC Suburban C1999 2500:

• (behind left side of dash)
• (near thermostat housing)
• (opens with belt buckled)
• B tan
• Battery input
• Body control module (in center console)
• C13
• C14
• Ctsy fuse 3 20a
• D11
• D15
• Distribution
• Drvr dr ajar sw
• Fasten belts out
• G119
• G134 (right top center of cylinder head)
• G201 (right side of dash)
• G202
• Gauges fuse 4 10a
• Ground
• Headlamp & panel dimmer switch
• Hot at all times
• Hot in run, or start
• I/p fuse block (under left side of dash)
• Instru- ment cluster
• Key-in warning
• Key-in warning buzzer switch (left side of steering column)
• Left door jamb switch
• Park lamp input
• Pklps fuse 9 20a
• Pnk
• Power
• S103
• S204
• S210 (near convenience center)
• S213
• S215
• S259
• S335
• S336
• Safety belts indicator
• Seat belt input
• Seat belt switch (on driver's seat belt buckle)
• Switched ignition
• System
• Tan

WIPER/WASHER

Front Wiper/Washer Wiring Diagram for GMC Suburban C1999 2500

List of elements for Front Wiper/Washer Wiring Diagram for GMC Suburban C1999 2500:

• Front windshield washer pump motor
• G108 (left radiator support)
• G202 (behind left side of dash)
• Hot in accy or run
• I/p fuse block (under left side of dash)
• Inst wipe
• Low
• Mist
• Nca
• Off
• Pulse
• Red
• Red a
• S158
• S204
• Solid state
• Wash
• Washer switch
• Windshield wiper motor module (on firewall, behind wiper motor)
• Windshield wiper/ washer switch
• Wiper fuse 11 25a
• Wiper switch

Rear Wiper/Washer Wiring Diagram for GMC Suburban C1999 2500

List of elements for Rear Wiper/Washer Wiring Diagram for GMC Suburban C1999 2500:

• Convenience center (under left side of dash)
• Delay
• G108 (left radiator support)
• G305 (right "b" pillar)
• Hot in accy or run
• I/p fuse block (under left side of dash)
• Interior lights system
• Off
• Rear window washer pump motor
• Rear window wiper/ washer switch
• Rear window wiper/washer module (on lower inner center of rear window)
• Rr wpr fuse 23 25a
• S158
• S219
• S410
• Solid state
• Wash