All Wiring Diagrams for Chevrolet Silverado 1999 2500

AIR CONDITIONING

4.3L

4.3L VIN W, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500:

• 4.3l
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (right side of accumulator)
• A/c request
• All other gas
• Diesel
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• Hot at all times
• Hot in run or start
• Hvac control module
• Ign e fuse 10a
• Relay cont
• S101 (engine harn)
• S102 (engine harn)
• Switch input
• Underhood bussed electrical center
• Vehicle control module (left side of engine compt)

4.3L VIN W, Heater Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Heater Wiring Diagram for Chevrolet Silverado 1999 2500:

• Blower motor
• Blower motor relay
• Blower motor resistor/ relay assembly (on hvac module, near blower motor)
• Blower motor switch
• D12
• Frt hvac fuse 30a
• G200 (right side of dash, at "a" pillar)
• Hot at all times
• Hot in run
• Htr-a/c fuse 25a
• Interior lights system
• Left bussed electrical center
• Off
• Tan
• Underhood bussed electrical center

4.3L VIN W, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500:

• 4.3l 4.3l
• A a/c disable
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on a/c compressor)
• A/c request
• All other gas all other gas
• B mode signal
• Blower motor (under right side of dash)
• Blower motor resistor/relay assembly (on hvac module, near blower motor)
• C 1995 vftc
• C ground
• C1 c1
• C2 c2
• C3 c3
• D recirc signal
• D12
• Diesel diesel
• E illumination
• F temp signal
• Frt hvac fuse 30a
• G feedback
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• G200 (right side of dash, at "a" pillar)
• G203 (on upper left dash at "a" pillar)
• H 5v reference
• High
• Hot at all times
• Hot in run
• Hot in run and start
• Htr-a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac control module (under radio)
• Ign e fuse 10a
• Interior lights system
• J rear defog
• K ign power
• L a/c request
• Left bussed electrical center
• Low
• M feedback
• Mid bussed electrical center
• Mode door motor (left side of hvac module)
• Off
• Rear defogger system
• Recirculation door motor (top of hvac module)
• Red
• Relay cont
• S101 (engine harn)
• S102 (engine harn)
• Switch sig
• Tan
• Temperature door motor (bottom center of hvac module)
• Underhood bussed electrical center
• Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)

4.3L VIN W, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500:

• 4.3l 4.3l
• A a/c disable
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on right side of accumulator)
• A/c request
• All other gas all other gas
• B mode signal
• Blower motor (under right side of dash)
• Blower motor resistor/relay assembly (on hvac module, near blower motor)
• C 1995 vftc
• C ground
• C1 c1
• C2 c2
• C3 c3
• D recirc signal
• D12
• Diesel diesel
• E illumination
• F temp signal
• Frt hvac fuse 30a
• G feedback
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• G200 (on upper dash, near "a" pillar)
• H 5v reference
• Hot at all times
• Hot in run
• Hot in run and start
• Htr-a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac control module (under radio)
• Ign e fuse 10a
• Interior lights system
• J rear defog
• K ign power
• L a/c request
• Left bussed electrical center
• M feedback
• Mode door motor (left side of hvac module)
• Module)
• Off
• Rear defogger system
• Recirculation door motor (top of hvac module)
• Red
• Relay cont
• Right bussed electrical center
• S101 (engine harn)
• S102 (engine harn)
• Switch sig
• Tan
• Temperature door motor (near bottom of hvac
• Underhood bussed electrical center
• Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)

4.8L

4.8L VIN V, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500:

• 4.3l
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (right side of accumulator)
• A/c request
• All other gas
• Diesel
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• Hot at all times
• Hot in run or start
• Hvac control module
• Ign e fuse 10a
• Relay cont
• S101 (engine harn)
• S102 (engine harn)
• Switch input
• Underhood bussed electrical center
• Vehicle control module (left side of engine compt)

4.8L VIN V, Heater Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Heater Wiring Diagram for Chevrolet Silverado 1999 2500:

• Blower motor
• Blower motor relay
• Blower motor resistor/ relay assembly (on hvac module, near blower motor)
• Blower motor switch
• D12
• Frt hvac fuse 30a
• G200 (right side of dash, at "a" pillar)
• Hot at all times
• Hot in run
• Htr-a/c fuse 25a
• Interior lights system
• Left bussed electrical center
• Off
• Tan
• Underhood bussed electrical center

4.8L VIN V, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500:

• 4.3l 4.3l
• A a/c disable
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on a/c compressor)
• A/c request
• All other gas all other gas
• B mode signal
• Blower motor (under right side of dash)
• Blower motor resistor/relay assembly (on hvac module, near blower motor)
• C 1995 vftc
• C ground
• C1 c1
• C2 c2
• C3 c3
• D recirc signal
• D12
• Diesel diesel
• E illumination
• F temp signal
• Frt hvac fuse 30a
• G feedback
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• G200 (right side of dash, at "a" pillar)
• G203 (on upper left dash at "a" pillar)
• H 5v reference
• High
• Hot at all times
• Hot in run
• Hot in run and start
• Htr-a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac control module (under radio)
• Ign e fuse 10a
• Interior lights system
• J rear defog
• K ign power
• L a/c request
• Left bussed electrical center
• Low
• M feedback
• Mid bussed electrical center
• Mode door motor (left side of hvac module)
• Off
• Rear defogger system
• Recirculation door motor (top of hvac module)
• Red
• Relay cont
• S101 (engine harn)
• S102 (engine harn)
• Switch sig
• Tan
• Temperature door motor (bottom center of hvac module)
• Underhood bussed electrical center
• Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)

4.8L VIN V, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500:

• 4.3l 4.3l
• A a/c disable
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on right side of accumulator)
• A/c request
• All other gas all other gas
• B mode signal
• Blower motor (under right side of dash)
• Blower motor resistor/relay assembly (on hvac module, near blower motor)
• C 1995 vftc
• C ground
• C1 c1
• C2 c2
• C3 c3
• D recirc signal
• D12
• Diesel diesel
• E illumination
• F temp signal
• Frt hvac fuse 30a
• G feedback
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• G200 (on upper dash, near "a" pillar)
• H 5v reference
• Hot at all times
• Hot in run
• Hot in run and start
• Htr-a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac control module (under radio)
• Ign e fuse 10a
• Interior lights system
• J rear defog
• K ign power
• L a/c request
• Left bussed electrical center
• M feedback
• Mode door motor (left side of hvac module)
• Module)
• Off
• Rear defogger system
• Recirculation door motor (top of hvac module)
• Red
• Relay cont
• Right bussed electrical center
• S101 (engine harn)
• S102 (engine harn)
• Switch sig
• Tan
• Temperature door motor (near bottom of hvac
• Underhood bussed electrical center
• Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)

5.3L

5.3L VIN T, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Compressor Wiring Diagram for Chevrolet Silverado 1999 2500:

• 4.3l
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (right side of accumulator)
• A/c request
• All other gas
• Diesel
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• Hot at all times
• Hot in run or start
• Hvac control module
• Ign e fuse 10a
• Relay cont
• S101 (engine harn)
• S102 (engine harn)
• Switch input
• Underhood bussed electrical center
• Vehicle control module (left side of engine compt)

5.3L VIN T, Heater Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Heater Wiring Diagram for Chevrolet Silverado 1999 2500:

• Blower motor
• Blower motor relay
• Blower motor resistor/ relay assembly (on hvac module, near blower motor)
• Blower motor switch
• D12
• Frt hvac fuse 30a
• G200 (right side of dash, at "a" pillar)
• Hot at all times
• Hot in run
• Htr-a/c fuse 25a
• Interior lights system
• Left bussed electrical center
• Off
• Tan
• Underhood bussed electrical center

5.3L VIN T, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Manual A/C Wiring Diagram, Base for Chevrolet Silverado 1999 2500:

• 4.3l 4.3l
• A a/c disable
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on a/c compressor)
• A/c request
• All other gas all other gas
• B mode signal
• Blower motor (under right side of dash)
• Blower motor resistor/relay assembly (on hvac module, near blower motor)
• C 1995 vftc
• C ground
• C1 c1
• C2 c2
• C3 c3
• D recirc signal
• D12
• Diesel diesel
• E illumination
• F temp signal
• Frt hvac fuse 30a
• G feedback
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• G200 (right side of dash, at "a" pillar)
• G203 (on upper left dash at "a" pillar)
• H 5v reference
• High
• Hot at all times
• Hot in run
• Hot in run and start
• Htr-a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac control module (under radio)
• Ign e fuse 10a
• Interior lights system
• J rear defog
• K ign power
• L a/c request
• Left bussed electrical center
• Low
• M feedback
• Mid bussed electrical center
• Mode door motor (left side of hvac module)
• Off
• Rear defogger system
• Recirculation door motor (top of hvac module)
• Red
• Relay cont
• S101 (engine harn)
• S102 (engine harn)
• Switch sig
• Tan
• Temperature door motor (bottom center of hvac module)
• Underhood bussed electrical center
• Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)

5.3L VIN T, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Manual A/C Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500:

• 4.3l 4.3l
• A a/c disable
• A/c automatic recirculating switch (in a/c muffler hose)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on right side of accumulator)
• A/c request
• All other gas all other gas
• B mode signal
• Blower motor (under right side of dash)
• Blower motor resistor/relay assembly (on hvac module, near blower motor)
• C 1995 vftc
• C ground
• C1 c1
• C2 c2
• C3 c3
• D recirc signal
• D12
• Diesel diesel
• E illumination
• F temp signal
• Frt hvac fuse 30a
• G feedback
• G100 (on left radiator support bracket)
• G102 (front of engine block)
• G200 (on upper dash, near "a" pillar)
• H 5v reference
• Hot at all times
• Hot in run
• Hot in run and start
• Htr-a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac control module (under radio)
• Ign e fuse 10a
• Interior lights system
• J rear defog
• K ign power
• L a/c request
• Left bussed electrical center
• M feedback
• Mode door motor (left side of hvac module)
• Module)
• Off
• Rear defogger system
• Recirculation door motor (top of hvac module)
• Red
• Relay cont
• Right bussed electrical center
• S101 (engine harn)
• S102 (engine harn)
• Switch sig
• Tan
• Temperature door motor (near bottom of hvac
• Underhood bussed electrical center
• Vehicle vehicle control control module module (left side (left side of engine of engine compt) compt)

ANTI-LOCK BRAKES

Anti-lock Brake Wiring Diagrams for Chevrolet Silverado 1999 2500

List of elements for Anti-lock Brake Wiring Diagrams for Chevrolet Silverado 1999 2500:

• 4.3l
• A4 c1
• Abs fuse 60a
• Automated transfer case control module (left side of dash, above headlight switch)
• Body wiring harness junction block (near left kick panel)
• Brake fluid level sw in
• Brake fluid level switch (left side of brake fluid reservoir)
• Brake fuse 10a
• Brake input
• Brake pressure modulator valve
• C11
• C8 a
• Data link connector (below steering column)
• Electronic brake control module (left side of inner frame)
• Engine control system
• Engine wiring harness junction block (left side of engine compt)
• Except 4.3 l
• F6 c3
• F7 c2
• Front axle act/sw input
• Front axle actuator/ switch (on axle housing)
• Fuse block (lower left side of dash)
• G110 (4.8l, 5.3l, 6.0l) (left front of engine)
• G116 (left rear of engine compt, near bulkhead)
• G119 (4.3l) (rt frt of eng)
• Ground
• Hot at all times
• Hot in run
• Hot in run and start
• Ign 1 fuse 10a
• Ignition
• Instrument cluster
• Left front sensor (+)
• Left front sensor (-)
• Left front wheel speed sensor
• Logic
• Motor & solenoid pwr
• Nca
• Pnk
• Power distribution system
• Powertrain control module or vehicle control module (left front of engine compt)
• Pump motor
• Red
• Right front sensor (+)
• Right front sensor (-)
• Right front wheel speed sensor
• S102
• Serial data
• Splice pack 205 center (near left kick panel)
• Stoplamp switch (top of brake pedal bracket)
• Tan
• Vehicle speed sensor (left rear of transmission)
• Vehicle speed sensor adapter (4wd only) (left side of transfer case)
• Vss high
• Vss input
• Vss low
• Vss output

ANTI-THEFT

Anti-theft Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Anti-theft Wiring Diagram for Chevrolet Silverado 1999 2500:

• 4.3l c4 data
• A12
• Battery
• Body control module (below steering column)
• Connector (below steering column)
• Cruise fuse 10a
• Data
• Data link
• Except 4.3l c1
• F10
• G200 (upper left kick panel)
• Grd
• Hot at all times
• Hot in run
• Ign 1 fuse 10a
• Ign pwr
• Left bussed electrical center (on lower left side of dash)
• Mid bussed electrical center (near left kick panel)
• Passlock sensor (part of the ignition cylinder)
• Pnk
• Sensor data
• Sensor pwr
• Sensor ret
• Sp203
• Sp203 (upper left kick panel)
• Tbc fuse 10a
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (4.3l), powertrain control module (except 4.3l) (on left front of engine compt)

BODY COMPUTER

Body Computer Wiring Diagrams for Chevrolet Silverado 1999 2500

List of elements for Body Computer Wiring Diagrams for Chevrolet Silverado 1999 2500:

• (54 or 394)
• 12v ref
• 5v ref
• A10
• A11
• A12
• Acc relay
• Ambient light sensor (top center of dash)
• Anti-theft system
• B10
• B11
• B12
• Battery
• Body control module (below steering column)
• Cargo lp
• Class 2 data
• Computer data lines system
• Cruise fuse 10a
• Ctsy lp
• Ctsy lp rly
• Door latch
• Door locks system
• Door sw
• Dr unlk rly
• Drl rly coil
• Engine controls system
• Exterior lights system
• F10
• Fog lp rly
• Fog lp sw
• Ftp sw
• G200 (upper left kick panel)
• Ground
• Headlamp rly
• Headlights system
• Headlp dim
• Horn rly out
• Horns system
• Hot at all times
• Hot in run
• Hot in run and start
• Ign 1 feed
• Ign 1 fuse 10a
• Ign 3 input
• Inadv pwr
• Inst panel lp
• Int lp sw
• Interior lights system
• Key cyl sw
• Key reminder
• Led dim
• Left bussed electrical center
• Lf dr sw
• Lock coil
• Lp rly coil
• Lt turn input
• Mid bussed electrical center
• Nca
• Park brake switch
• Passlock sig
• Photocell
• Pk lp rly
• Pk lps feed
• Pnk
• Power distribution system
• Prk bk sw
• Rfa link
• Rt turn input
• Seat belt sw
• Sensor rtn
• Serial data
• Sp203
• Tan
• Tbc fuse 10a
• Tow/haul sw
• Tow/haul switch
• Underhood bussed electrical center
• Unlock coil
• Vss
• Warning system

COMPUTER DATA LINES

Computer Data Lines for Chevrolet Silverado 1999 2500

List of elements for Computer Data Lines for Chevrolet Silverado 1999 2500:

• (under driver's seat) inflatable restraint sensing & diagnostic module
• 4.3l
• A12
• All other gas
• Automatic transfer case control module (left side of dash, above headlight switch)
• Body control module (on lower left side of dash, below steering column)
• Cigar fuse 15a
• Data link connector (dlc) (under left side of dash, below steering column)
• Diesel
• Electronic brake control module (ebcm) (on left side of the inner frame)
• G117 (right rear of of engine)
• G200 (upper left kick panel)
• Hot at all times
• Instrument cluster
• Mid bussed electrical center (under left side of dash)
• Splice pack sp205 (left side of dash)
• Tan
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (vcm)/ powertrain control module (pcm) (left front of engine compt)

CRUISE CONTROL

Cruise Control Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Cruise Control Wiring Diagram for Chevrolet Silverado 1999 2500:

• (4.3l vin w)
• (other)
• 4.3l
• 4.3l only
• A/t
• A12
• A13
• A14
• A15
• Bare
• Brake cutout
• Brake fuse 10a
• C1 a4
• C1 a6
• C2 f6
• Clutch pedal position switch (on top of clutch pedal bracket)
• Cruise control module (left rear of engine compt, on firewall)
• Cruise control switch
• Cruise fuse 10a
• Cruise on ind cntrl
• Cruise on/off
• Cruise set/coast
• D11
• Data link connector (below steering column)
• F11
• F12
• G115 (rear of engine)
• Ground
• Hot at all times
• Hot in run
• Hot in run and start
• Ign 1 fuse 10a
• Ignition
• Instrument cluster
• Instrument cluster system
• Left bussed electrical center (on lower left side of dash)
• Logic
• M/t
• Mid bussed electrical center (under left left of dash)
• Nca
• Off
• On ind control
• Orn
• Other
• Pnk
• R/a
• Resume/accel
• S103
• Serial data
• Set sw
• Sound system
• Splice pack 205 (left side of dash, behind headlamp switch)
• Stop lps fuse 20a
• Stoplamp sw input
• Stoplamp switch (on top of brake pedal bracket)
• Underhood bussed electrical center (on left side of engine compartment)
• Veh stop fuse 10a
• Vehicle control module (pcm) powertrain control module (vcm) (left front of engine compt)
• Vehicle speed sensor (vss) (left rear side of transmission)
• Vehicle speed sensor adapter (4wd only, except 4.3l)
• Vss high
• Vss input
• Vss low

DEFOGGERS

Defogger Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Defogger Wiring Diagram for Chevrolet Silverado 1999 2500:

• (base)
• (right "b" pillar) g305
• (uplevel)
• (upper right kick panel) g203
• A c1
• A c2
• C c1
• D9 c1
• F3 c1
• Fuse block (on lower left side of dash)
• G200
• Ground
• Hot at all times
• Hot in run
• Hot in run & start
• Hvac 1 fuse 10a
• Hvac control module (in center of dash, under radio)
• Ign
• Ign fuse 10a
• Ind
• K c1
• Rear window defogger grid
• Rear window defogger relay
• Relay ctrl
• Rr defog fuse 30a
• Splice pack sp203 (upper left kick panel)
• Underhood junction block (at left side of engine compartment, near battery)

Heated Mirrors Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Heated Mirrors Wiring Diagram for Chevrolet Silverado 1999 2500:

• Base
• Body junction block (under left side of dash, near kick panel)
• C c7
• C1 c
• C1 f2
• D2 c1
• D9 c1
• Defog request
• Defogger switch/ timer
• Driver outside rearview mirror
• Driver window/ door lock switch
• F c5
• F3 c1
• Fuse block (on lower left side of dash)
• G200 (upper left kick panel)
• G203 (upper right kick panel)
• Ground
• Ground distribution system
• Hot at all times
• Hot in run
• Hot in run & start
• Htd mir fuse 10a
• Hvac 1 fuse 10a
• Hvac control module (in center of dash, under radio)
• I/p junction block (on lower right side of dash)
• Ign 3
• Ign e fuse 10a
• Ind
• K c1
• M c1
• Nca
• Passenger outside rearview mirror
• Passenger window/ door lock switch
• Rear window defogger relay
• Relay ctrl
• Splice pack 203
• Underhood junction block (at left side of engine compartment, near battery)
• Uplevel

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Electronic Suspension Wiring Diagram for Chevrolet Silverado 1999 2500:

• Dimming control
• E11
• Firm
• G200
• G308 (left side of "b" pillar)
• G415 (on spare tire hoist bracket)
• Hot in run or start
• Illum
• Indicator
• Interior lights system
• Left bussed electrical center (on lower left side of dash)
• Left front shock solenoid valve (part of left front shock absorber)
• Left rear shock solenoid valve (part of left rear shock absorber)
• Mid bussed electrical center (left side of dash, near kick panel)
• Off
• Pnk
• Right front shock solenoid valve (part of right front shock absorber)
• Right rear shock solenoid valve (part of right rear shock absorber)
• Selectable ride switch
• Seo ign fuse 10a
• Sp203 (upper left kick panel)
• Underhood bussed electrical center (left side of engine compt)

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500:

• (attached to right rear of throttle body)
• (left rear of engine)
• (on bottom front of engine near crank pulley) crankshaft position sensor
• (on right front side of engine) evaporative emissions canister vent (evap)
• (top right rear of engine) evaporative emissions (evap) canister purge valve
• 1-2 shift sol ctrl
• 2-3 shift sol ctrl
• 3-2 ctrl sol ctrl
• B1 c2
• Cam posit sens rtn
• Cam posit sens sig
• Camshaft position sensor (inside distributor)
• Crank posit sens rtn
• Crank posit sens sig
• Ect sens input
• Egr posit input
• Electronic brake control module (ebcm) (on left side of inner frame)
• Evap
• G114
• G117 (right rear of engine)
• Heated oxygen sensor (ho2s) bank 1 sensor 1 (in exhaust pipe, before catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 1 (in exhaust pipe, before catalytic converter)
• Heated oxygen sensor (ho2s) bank 2 sensor 2 (in exhaust pipe, after catalytic converter)
• Ho2s sens hi
• Ho2s sens lo
• Hot in run or start
• Iat sens sig
• Idle air control (iac) valve
• 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
• Instrument cluster system (tachometer)
• Knock sens sig
• Knock sensor (on rear of engine block)
• Map sens input
• Mass air flow sens sig
• Nca
• O2a fuse 15a
• O2b fuse 15a
• Pnk
• Purge valve
• S104
• Sair pump rly
• Sens rtn
• Sens sig
• Tach out
• Tan
• Tcc on/off sol ctrl
• Tcc pwm sol ctrl
• Throttle posit sens
• Trans temp sens sig
• Underhood bussed electrical center
• Vehicle control module (vcm) (on left front of engine compartment)
• Vehicle spd output sig
• Vehicle speed sensor (left rear side of transmission)
• Vehicle speed sensor shield
• Vss input
• Vss rtn
• Vss signal

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500:

• 1-2 shift sol
• 2-3 shift sol
• 3-2 control sol
• Automatic transmission
• B6 c3
• C ground
• C10
• C12
• D ign
• D10
• E maf sig
• E12
• E3 c2
• Eng1 fuse 10a
• Exhaust gas recirculation valve (egr) (top front of engine, near thermostat housing)
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6 no.6
• G117 (right rear of engine)
• Heated oxygen sensor (ho2s) bank 1 sensor 2 (in exhaust pipe, after catalytic converter)
• Hot in run or start
• Iat sensor
• Inja fuse 15a
• Injb fuse 15a
• Mass air flow sensor (in air intake duct)
• Nca
• Pnk
• Pnk b
• Pnk d
• Pnk e
• Pnk h
• Pnk j
• Pnk l
• Pressure control solenoid valve
• Red
• S103
• Tan
• Tcc on/off sol
• Tcc pwm sol
• Transmission fluid temperature (tft) sensor (internal)
• Underhood bussed electrical center

4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500:

• (in engine harn)
• (in fuel tank) fuel tank pressure sensor
• (left rear of engine)
• (right front of engine)
• 5v ref
• Air maxi fuse 30a
• Engine coolant level switch (in coolant reservoir)
• Engine coolant temperature sensor (left rear side of cylinder head)
• Engine oil level switch (right side of oil pan)
• Front axle actuator/ switch
• G114
• G114 (left rear of engine)
• G119
• Hot at all times
• Hot in run or start
• Ign0 fuse 10a
• Ign1 fuse 10a
• Igne fuse 10a
• Instrument cluster
• Left bussed electrical center
• Manifold absolute pressure (map) sensor (top right of engine, near fuel injectors)
• Map
• Mid bussed electrical center c1
• Pnk
• Red
• Red a
• Ref lo
• S102
• S104
• S105
• S106 (in engine harn)
• S107
• S108
• Secondary air injection pump relay (in underhood bussed electrical center)
• Secondary air injection reaction pump (right rear of engine compt)
• Secondary air injection reaction valve solenoid (right rear of engine compt)
• Service engine soon indicator
• Temp
• Throttle position (tp) sensor (on throttle body assembly)
• Underhood bussed electrical center

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500:

• (left frame rail near body mount)
• (right rear of engine)
• 12v battery fused
• 4wd fuse 15a
• 4wd low ind sig
• 5v ref voltage
• 5v return
• A/c comp rly ctrl
• A/c rec sw
• A/c request signal
• A/c system
• Automatic transfer case control module (above headlight switch)
• Body control module (below steering column)
• Brake fuse 10a
• Brake switch input
• C11
• Check eng lp ind out
• Clutch pedal position switch (top of clutch pedal)
• Coil wire
• Comp cycling sw
• Coolant lev
• Cpp sw input
• Cruise control system
• Cruise control system, body computer system (vehicle speed signal)
• Cruise ctrl sig-eng
• Data link connector (below steering column)
• Distributor
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Egr valve cntrl
• Est output sig
• Evap sol purge ctrl
• Four whl dr sig lo
• Fuel lev sensor
• Fuel pump relay
• Fuel pump rly ctrl
• Fuel pump/ level sensor
• Fused output
• G117
• G119 (right front of engine)
• G402
• Gen term l
• Ground
• Hot at all times
• Hot in run and start
• Ign
• Ign timing sig.
• Ignition coil (top right rear of engine)
• Ignition control module (right side, top of engine)
• Ignition feed
• Left bussed electrical center
• Manual 4wd
• Mid bussed electrical center c1
• Oil level signal
• Park/neutral position switch (left side of transmission)
• Pnk
• Pnk a
• Power
• Press ctrl sol hi
• Press ctrl sol lo
• Prndl a
• Prndl b
• Prndl c
• Prndl p
• Recirc door sig
• Red
• S102
• S103
• S199
• Sensor ground
• Serial data
• Serial data sig
• Sp205 (behind headlamp switch)
• Starting/char- ging system
• Stoplamp switch (top of brake pedal bracket)
• Tach. sig.
• Trans press sig-bit 1
• Trans press sig-bit 2
• Trans press sig-bit 3
• Transfer case switch
• Underhood bussed electrical center
• Vcm ground
• Vehicle control module (vcm) (on left front of engine compartment)
• Vss sig
• W/ atc

4.8L

4.8L VIN V, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500:

• (below steering column) data link connector
• (lower right rear of engine) crankshaft position sensor
• (right rear of engine)
• +5v
• 1995 vftc
• 3-2 ss
• Body control module (below steering column)
• Brk sw
• C10
• C11
• C12
• Ckp
• Cls 2 data
• Clutch sw
• Cmp
• Coolant lev
• D10
• E12
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Egr input
• G117
• G117 (right rear of engine) c
• Gnd
• Ho2s hi
• Ho2s lo
• Hot at all times
• Hot in run and start
• Ign
• Ign 0 fuse 10a
• Inj1
• Inj2
• Inj3
• Inj4
• Inj5
• Inj6
• Inj7
• Inj8
• Inja fuse 15a
• Injb fuse 15a
• Injectors
• Ks signal
• Left bussed electrical center
• O2a fuse 15a
• O2b fuse 15a
• Oil lev
• Pnk
• Pnk b
• Powertrain control module (left front of engine compt)
• Prnd a
• Prnd b
• Prnd p
• Range b
• Range c
• Red
• Ref low
• S103
• Sens gnd
• Sens rtn
• Sp205 (behind headlamp switch)
• Tan
• Tan tan
• Underhood bussed electrical center

4.8L VIN V, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500:

• (left front of engine)
• (left rear of engine)
• (left rear of engine) g114
• (not used)
• 1995 vftc c
• Air maxi fuse 30a c7
• Ecm b fuse 20a
• Engine coolant level switch (in coolant reservoir)
• Engine coolant temperature sensor (left front of cylinder head)
• Engine oil level switch (right side of oil pan)
• Front knock sensor (under intake manifold)
• Fuel pump relay
• Fuel pump/ level sensor (in fuel tank)
• G104
• G110
• G114 (left rear of engine)
• G117 (right rear of engine)
• G402 (left frame body mount bracket)
• Heated oxygen sensor (bank 1 sensor 1) (left exh pipe before converter)
• Heated oxygen sensor (bank 1 sensor 2) (left exh pipe after converter)
• Heated oxygen sensor (bank 2 sensor 1) (right exh pipe (before converter)
• Heated oxygen sensor (bank 2 sensor 2) (right exh pipe after converter)
• Hot at all times
• Hot in run and start
• Ign e fuse 10a c2
• Nca
• Park/neutral position switch (left side of transmission)
• Pnk
• Rear knock sensor (under intake manifold)
• Red
• S103
• S104
• S104 (in engine harness)
• S108
• Secondary air injection reaction pump (right rear of engine compt)
• Secondary air injection reaction relay (in underhood bussed electrical center)
• Secondary air injection reaction solenoid (right rear of engine compt)
• Tan
• Throttle position sensor (on throttle body assy)
• Underhood bussed electrical center

4.8L VIN V, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500:

• 1-2 sol
• 2-3 sol
• 3-2 sol
• A/t fluid pressure manual valve position switch
• Automatic transaxle
• Brake fuse 10a
• Camshaft position sensor (top center rear of engine)
• Clutch pedal position switch (top of pedal bracket)
• Evap canister purge valve (top right rear of engine)
• Evap canister vent valve (right front side of engine)
• Exhaust gas recirculation valve (top right front of engine)
• Fuel tank pressure sensor (in fuel tank)
• G117 (right rear of engine)
• Gnd
• Hot in run
• Hot in run and start 1995 vftc c
• Iat sensor
• Ign
• Ign0 fuse 10a
• Left bussed elec- trical center
• Manifold absolute pressure sensor (top rear of engine)
• Mass airflow sensor (in air intake duct)
• Mid bussed electrical center
• N pnk
• P red
• Pc sol valve
• Pnk
• Pnk a
• Pnk b
• Pnk d
• Red
• Red e
• Red/
• Rev
• S103
• Signal
• Stop- lamp switch (top of brake pedal)
• Tan
• Tan b
• Tcc pwm sol
• Tcc sol
• Tft sensor
• Underhood bussed electrical center c2
• Vehicle speed sensor (left rear of transmission)
• Vss adapter (4wd) (left side of trans)

4.8L VIN V, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500:

• (in engine harness)
• (left front of engine) g110
• (left rear of engine) g114
• 1-2 ss
• 1995 vftc c
• 2-3 ss
• 4wd low
• A/c clu
• A/c req
• A/c system
• A10
• Air pump
• Anti-lock brake system (speed signal)
• Automatic transfer case control module (above c3 headlight switch)
• Cruise control system
• Cruise control, instrument cluster systems (speed signal)
• Cruise eng
• Ctrl
• Cyc sw in
• Egr ctrl
• Egr gnd
• Eng1 fuse 10a
• Evap canp
• Evap vent
• Front axle switch
• Frt axle sw
• Fuel lev
• Fuel pmp
• Fuel sig ctrl
• G117 (right rear of engine)
• Gen l
• Gnd
• Hot in run and start
• Iac coil hi
• Iac coil lo
• Iat sig
• Idle air control valve (top of throttle body)
• Ign
• Ign ctrl
• Ign feed
• Ign1 fuse 10a
• Ignition coils
• Instrument cluster
• Left bussed electrical center
• Maf sig
• Malfunction indicator lamp
• Map sig
• Mil ctrl
• Nca
• Nca nca
• Pc sol hi
• Pc sol lo
• Pnk
• Pnk d
• Powertrain control module (left front of engine compt)
• Prnd c
• Recirc door
• Recirc sw
• Red
• Red c
• Ref lo
• Ref low
• Rpm out
• S103
• S151
• S152
• S153
• S154
• S157
• Sens gnd
• Spark plug
• Starting/charging system
• Tan
• Tcc pwm
• Tcc sol
• Tft sens sig
• Tp sig
• Trans rng a
• Transfer case switch
• Underhood bussed electrical center
• Vss high
• Vss low
• Vss out
• W/ atc
• W/ manual 4wd

5.3L

5.3L VIN T, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Silverado 1999 2500:

• (below steering column) data link connector
• (lower right rear of engine) crankshaft position sensor
• (right rear of engine)
• +5v
• 1995 vftc
• 3-2 ss
• Body control module (below steering column)
• Brk sw
• C10
• C11
• C12
• Ckp
• Cls 2 data
• Clutch sw
• Cmp
• Coolant lev
• D10
• E12
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Egr input
• G117
• G117 (right rear of engine) c
• Gnd
• Ho2s hi
• Ho2s lo
• Hot at all times
• Hot in run and start
• Ign
• Ign 0 fuse 10a
• Inj1
• Inj2
• Inj3
• Inj4
• Inj5
• Inj6
• Inj7
• Inj8
• Inja fuse 15a
• Injb fuse 15a
• Injectors
• Ks signal
• Left bussed electrical center
• O2a fuse 15a
• O2b fuse 15a
• Oil lev
• Pnk
• Pnk b
• Powertrain control module (left front of engine compt)
• Prnd a
• Prnd b
• Prnd p
• Range b
• Range c
• Red
• Ref low
• S103
• Sens gnd
• Sens rtn
• Sp205 (behind headlamp switch)
• Tan
• Tan tan
• Underhood bussed electrical center

5.3L VIN T, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Silverado 1999 2500:

• (left front of engine)
• (left rear of engine)
• (left rear of engine) g114
• (not used)
• 1995 vftc c
• Air maxi fuse 30a c7
• Ecm b fuse 20a
• Engine coolant level switch (in coolant reservoir)
• Engine coolant temperature sensor (left front of cylinder head)
• Engine oil level switch (right side of oil pan)
• Front knock sensor (under intake manifold)
• Fuel pump relay
• Fuel pump/ level sensor (in fuel tank)
• G104
• G110
• G114 (left rear of engine)
• G117 (right rear of engine)
• G402 (left frame body mount bracket)
• Heated oxygen sensor (bank 1 sensor 1) (left exh pipe before converter)
• Heated oxygen sensor (bank 1 sensor 2) (left exh pipe after converter)
• Heated oxygen sensor (bank 2 sensor 1) (right exh pipe (before converter)
• Heated oxygen sensor (bank 2 sensor 2) (right exh pipe after converter)
• Hot at all times
• Hot in run and start
• Ign e fuse 10a c2
• Nca
• Park/neutral position switch (left side of transmission)
• Pnk
• Rear knock sensor (under intake manifold)
• Red
• S103
• S104
• S104 (in engine harness)
• S108
• Secondary air injection reaction pump (right rear of engine compt)
• Secondary air injection reaction relay (in underhood bussed electrical center)
• Secondary air injection reaction solenoid (right rear of engine compt)
• Tan
• Throttle position sensor (on throttle body assy)
• Underhood bussed electrical center

5.3L VIN T, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Silverado 1999 2500:

• 1-2 sol
• 2-3 sol
• 3-2 sol
• A/t fluid pressure manual valve position switch
• Automatic transaxle
• Brake fuse 10a
• Camshaft position sensor (top center rear of engine)
• Clutch pedal position switch (top of pedal bracket)
• Evap canister purge valve (top right rear of engine)
• Evap canister vent valve (right front side of engine)
• Exhaust gas recirculation valve (top right front of engine)
• Fuel tank pressure sensor (in fuel tank)
• G117 (right rear of engine)
• Gnd
• Hot in run
• Hot in run and start 1995 vftc c
• Iat sensor
• Ign
• Ign0 fuse 10a
• Left bussed elec- trical center
• Manifold absolute pressure sensor (top rear of engine)
• Mass airflow sensor (in air intake duct)
• Mid bussed electrical center
• N pnk
• P red
• Pc sol valve
• Pnk
• Pnk a
• Pnk b
• Pnk d
• Red
• Red e
• Red/
• Rev
• S103
• Signal
• Stop- lamp switch (top of brake pedal)
• Tan
• Tan b
• Tcc pwm sol
• Tcc sol
• Tft sensor
• Underhood bussed electrical center c2
• Vehicle speed sensor (left rear of transmission)
• Vss adapter (4wd) (left side of trans)

5.3L VIN T, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Silverado 1999 2500:

• (in engine harness)
• (left front of engine) g110
• (left rear of engine) g114
• 1-2 ss
• 1995 vftc c
• 2-3 ss
• 4wd low
• A/c clu
• A/c req
• A/c system
• A10
• Air pump
• Anti-lock brake system (speed signal)
• Automatic transfer case control module (above c3 headlight switch)
• Cruise control system
• Cruise control, instrument cluster systems (speed signal)
• Cruise eng
• Ctrl
• Cyc sw in
• Egr ctrl
• Egr gnd
• Eng1 fuse 10a
• Evap canp
• Evap vent
• Front axle switch
• Frt axle sw
• Fuel lev
• Fuel pmp
• Fuel sig ctrl
• G117 (right rear of engine)
• Gen l
• Gnd
• Hot in run and start
• Iac coil hi
• Iac coil lo
• Iat sig
• Idle air control valve (top of throttle body)
• Ign
• Ign ctrl
• Ign feed
• Ign1 fuse 10a
• Ignition coils
• Instrument cluster
• Left bussed electrical center
• Maf sig
• Malfunction indicator lamp
• Map sig
• Mil ctrl
• Nca
• Nca nca
• Pc sol hi
• Pc sol lo
• Pnk
• Pnk d
• Powertrain control module (left front of engine compt)
• Prnd c
• Recirc door
• Recirc sw
• Red
• Red c
• Ref lo
• Ref low
• Rpm out
• S103
• S151
• S152
• S153
• S154
• S157
• Sens gnd
• Spark plug
• Starting/charging system
• Tan
• Tcc pwm
• Tcc sol
• Tft sens sig
• Tp sig
• Trans rng a
• Transfer case switch
• Underhood bussed electrical center
• Vss high
• Vss low
• Vss out
• W/ atc
• W/ manual 4wd

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Back-up Lamps Wiring Diagram for Chevrolet Silverado 1999 2500:

• (left side of transmission) backup lamp switch
• A trailer connector (heavy duty)
• A/t
• B/u lp fuse 25a
• B10
• Backup lamp switch (part of park/neutral position switch) (left center of transmission)
• G415 (on spare tire hoist bracket)
• Hot in run or start
• Left backup lamp
• M/t
• Mirrors system (automatic day/night mirror)
• Pnk
• Rear lamps bussing block (front of rear bumber, on crossmember)
• Right backup lamp
• Trlr b/u fuse 10a
• Underhood bussed electrical center
• Veh b/u fuse 15a

Exterior Lamps Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Exterior Lamps Wiring Diagram for Chevrolet Silverado 1999 2500:

• (left side of engine compartment) underhood bussed electrical center
• (lower left side of dash) left bussed electrical center
• (under left side of dash) mid bussed electrical center
• (upper right kick panel) g203
• A c3
• A10
• A12
• A4 c1
• B10
• Base
• Body control module (lower left side of dash)
• Bulbs
• C1 b12
• C1 b2
• C1 b6
• C1 b7
• C1 c8
• C1 d
• C1 f6
• C1 f7
• C11 c1
• C2 a
• C2 a6
• C2 a7
• C2 b6
• C2 c
• C2 d
• C2 d12
• C3 a6
• C3 e2
• C3 h
• C4 a
• C4 c
• C4 d
• C4 f
• C5 a
• C6 b
• C6 g
• Center high mount stop lamp/ cargo lamp
• Chmsl fuse 10a
• Clearance lamps
• D10
• D11
• E c1
• F12
• Fr prk fuse 10a
• G108 (left radiator support bracket)
• G200 (upper left kick panel)
• G308 (left side of "b" pillar)
• G415 (on spare tire hoist bracket)
• Haz lp fuse 20a
• Hazard
• Head
• Headlamp and panel dimmer switch
• Hot at all times
• Hot in run or start
• Instrument cluster
• Int prk fuse 10a
• Interior lights system
• Left
• Left bussed electrical center (lower left side of dash)
• Left front marker lamp
• Left front park/ turn lamp
• Left license lamp
• Left rear turn lamp
• Left roof marker lamp
• Left tail/ stop- lamp
• Left turn in
• Left turn ind
• Lr prk fuse 10a
• Lt turn fuse 10a
• Mid bussed electrical center (under left side of dash)
• Nca
• Normal
• Off
• Park
• Park lamp relay
• Park lps fuse 20a
• Park rly ctrl
• Pnk
• Rear lamps bussing block (front of rear bumper, on cross- member)
• Right
• Right bussed electrical center (lower right side of dash)
• Right front marker lamp
• Right front park/ turn lamp
• Right license lamp
• Right rear turn lamp
• Right roof marker lamp
• Right tail/ stop- lamp
• Right turn in
• Right turn ind
• Roof beacon provision
• Roof beacon relay (left "b" pillar)
• Roof beacon switch
• Rr prk fuse 10a
• Rt turn fuse 10a
• S100
• S101
• S200 (at roof marker lamps)
• S201
• Seo 1 fuse 15a
• Seo 2 fuse 30a
• Sp203
• Stop lps fuse 20a
• Stoplamp switch (on brake pedal support bracket)
• Trailer wiring provision
• Trl l trn fuse 10a
• Trl r trn fuse 10a
• Turn fuse 20a
• Turn/ hazard switch
• Turn/hazard flasher
• Underhood bussed electrical center (left side of engine compartment)
• Uplevel
• Veh stop fuse 10a

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Silverado 1999 2500

List of elements for Ground Distribution Wiring Diagram (1 of 3) for Chevrolet Silverado 1999 2500:

• (4.3l)
• (4.3l) g119 (right front of engine)
• (all gas ex 4.3l)
• (all other gas)
• (diesel)
• (forward lamp harn)
• 4.3l
• A c1
• A/c
• A/c automatic recirculating switch
• Air injection reaction pump
• Air injection reaction solenoid
• All other gas
• Automatic transfer case (atc) control module
• Auxiliary
• Battery relay
• Brake fluid
• C2 a7
• C2 b8
• Coil module
• Compressor clutch
• Compressor low pressure cycling switch
• Cruise control module
• D12
• Data link connector (dlc)
• Electronic brake control module (ebcm)
• Engine
• Front axle actuator/ switch
• Fuel pump relay
• G102 (on left front body mount)
• G108 (left radiator support bracket)
• G110 (4.8l, 5.3l, 6.0l) (left front of engine)
• G114 (left rear of engine)
• G117 (4.8l, 5.3l, 6.0l) (right rear of engine)
• G117 (right rear of engine)
• Headlamp relay
• Heated oxygen sensor (ho2s) (bank 1 sensor 1)
• Heated oxygen sensor (ho2s) (bank 1 sensor 2)
• Heated oxygen sensor (ho2s) (bank 2 sensor 1)
• Heated oxygen sensor (ho2s) (bank 2 sensor 2)
• Ign 1 relay
• Ignition
• Ignition coils (left bank) (v8 gas only)
• Ignition coils (right bank) (v8 gas only)
• Instrument cluster
• Left battery
• Left daytime running lamp (drl)
• Left fog lamp
• Left horn (low)
• Left park/ turn lamp
• Level switch
• Low washer switch
• Mass airflow (maf) sensor
• Mid bussed electrical center (under left side of dash)
• Motor module
• Nca
• Oil level switch
• Park/ neutral position switch
• Right battery
• Right daytime running lamp (drl)
• Right fog lamp
• Right horn (v22 only)
• Right park/ turn lamp
• S100
• S156 (eng harn)
• S157 (eng harn)
• Secondary
• Starter relay
• Transfer case switch
• Underhood bussed electrical center (left side of eng compt)
• Underhood lamp
• Vehicle control module (vcm)/ powertrain control module (pcm)
• Vss shield (4.3l)
• W/atc
• W/o atc
• Windshield washer pump
• Windshield wiper

Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Silverado 1999 2500

List of elements for Ground Distribution Wiring Diagram (2 of 3) for Chevrolet Silverado 1999 2500:

• (base only)
• (base only) cigar lighter
• (base only) left mini wedge (door jamb switch)
• (base only) left power door lock switch
• (base only) mode door motor
• (base only) recirculation door motor
• (base only) right mini wedge (door jamb switch)
• (base only) temperature door motor
• (not used)
• (uplevel only)
• (uplevel only) automatic transfer case (atc) select switch
• (uplevel only) cigar lighter
• 87a
• A12
• A16
• Ashtray lamp
• Automatic day-night rearview mirror w/ compass
• Automatic transfer case (atc) control module
• Auxiliary power outlet
• B12
• Blower motor switch/hvac control module
• Body control module
• Brake transmission shift interlock solenoid
• C10
• C11
• Center high mounted stop/ cargo lamp
• Courtesy lamp relay
• Data link connector (dlc)
• E13
• E16
• F12
• Fog/ cargo lamp switch
• Full feature seat heated/ memory seat switch
• G200 (upper left kick panel)
• Headlamp and panel dimmer switch
• Headlamp dimmer switch
• Horn switch
• Inflatable restraint i/p module switch
• Instrument cluster
• Key cylinder switch
• Left bussed electrical center (lower left side of dash)
• Left door key switch
• Left mini wedge (door jamb switch)
• Left outside power mirror
• Left power window/ door lock switch
• Mid bussed electrical center (under left side of dash)
• Nca
• Park switch
• Power door lock switch
• Power door locks relay
• Power mirror switch
• Power window switch
• Radio
• Reading lamps
• Remote control door lock receiver
• Right power door lock switch
• Roof beacon switch
• Selectable ride switch
• Sp203
• Steering column
• Tow/haul switch
• Turn/ hazard flasher

Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Silverado 1999 2500

List of elements for Ground Distribution Wiring Diagram (3 of 3) for Chevrolet Silverado 1999 2500:

• (base seat)
• (diesel)
• (gas)
• (heavy duty) trailer connector
• (light duty) trailer connector
• A11
• Blower motor resistor/ relay assembly
• C b
• Door lock switch
• Driver power seat switch
• Driver seat belt switch
• Driver seat bolster switch
• Driver seat heating element
• Driver seat lumbar motor
• Driver seat thermistor
• Fuel pump/ level sensor fuel pump
• Full feature seat
• G203 (upper right kick panel)
• G300 (under driver's seat)
• G308 (left side of "b" pillar)
• G308 (right side of "b" pillar)
• G415 (on spare tire hoist bracket)
• G416 (on left frame rail near body mount)
• Hvac control module
• I/p compartment lamp
• Inflatable restraint front end discriminating sensor
• Inflatable restraint sensing and diagnostic module
• Left backup lamp
• Left front shock solenoid valve
• Left license lamp
• Left rear shock solenoid valve
• Left tail/ stoplamp
• Left turn lamp
• Light bar ground
• Memory seat module
• Mode door motor
• Nca
• Passenger heated seat switch
• Passenger power seat belt switch
• Passenger seat bolster switch
• Passenger seat heating element
• Passenger seat lumbar motor
• Passenger seat switch
• Passenger seat thermistor
• Power seat
• Power window switch
• Rear lamps bussing block (front of rear bumper, on crossmember)
• Rear window def0gger element
• Recirculation door motor
• Right backup lamp
• Right bussed electrical center (lower right side of dash)
• Right front shock solenoid valve
• Right license lamp
• Right mini wedge (door jamb switch)
• Right outside power mirror
• Right power window/ door lock switch
• Right rear shock solenoid valve
• Right tail/ stoplamp
• Right turn lamp
• Roof beacon relay
• Roof marker lamps
• S201 (near roof marker lamps)
• Seat belt switch
• Temperature door motor
• Uplevel only
• Window lock out

HEADLIGHTS

Headlight Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Headlight Wiring Diagram for Chevrolet Silverado 1999 2500:

• A11
• Al sens ref
• Al sens sig
• Ambient light sensor (on top center of dash)
• Auto
• Body control module (lower left side of dash)
• C1 b4
• C1 c3
• C1 c7
• C2 f7
• Drl fuse 10a
• Drl relay
• E10
• E11
• E12
• E13
• Exterior lamps system (park lamp relay)
• F2 c1
• Flash- to-pass
• Fog lamp relay
• Fog lamp switch
• Fog lp relay
• Fog lp sw
• Fog lps fuse 15a
• Ftp in
• G108 (on left radiator support)
• G110 (on left front of engine block)
• G202
• Head
• Headlamp and panel dimmer switch
• Headlamp dimmer switch
• Headlamp relay
• High
• High beam
• Hot at all times
• Hot in run or start
• Igne fuse 10a
• Left drl bulb
• Left fog lamp
• Left high beam headlamp
• Left low beam headlamp
• Low
• Lt hdlp fuse 15a
• Mid bussed electrical center (under left side of dash)
• On indicator
• Park
• Right drl bulb
• Right fog lamp
• Right high beam headlamp
• Right low beam headlamp
• S100
• S101
• S102
• Splice pack 203 (left side of dash)
• Tbc fuse 10a
• Underhood bussed electrical center (left side of engine compt)

HORN

Horn Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Horn Wiring Diagram for Chevrolet Silverado 1999 2500:

• A11
• Body control module (below steering column)
• C1 a9
• G108 (on left radiator support bracket)
• Horn relay
• Horn relay control
• Horn switch
• Hot at all times
• Left horn (left lower corner of radiator core support)
• Nca
• Right horn (right lower corner of radiator core support)
• S100
• S101
• Underhood bussed electrical center (left side of engine compt)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Instrument Cluster Wiring Diagram for Chevrolet Silverado 1999 2500:

• (4.3l) (others)
• (mil)
• (not used)
• (service eng soon)
• -prndl -trip -odometer -hour meter
• 4wd ind
• A10
• A11
• A12
• Abs ind
• Air bag ind
• Automatic transfer case control module (left side of dash, above headlight switch)
• B10
• B11
• B12
• Body control module (lower left side of dash, below steering column)
• Brake ind
• Check engine oil press
• Cruise control module (left rear of eng compt, on firewall)
• Cruise fuse 10a
• Cruise ind
• Data link connector (under left side of dash, below steering column)
• Electronic brake control module (left side of the inner frame)
• Engine controls system
• Engine oil pressure sensor (on left side of oil pan)
• Exterior lights system
• Fuel gauge
• G108 (left radiator support bracket)
• G117 (right rear of eng)
• High beam ind
• Hot at all times
• Hot in run
• Hot in run or start
• Hot in run, bulb test or start
• Ign 0 fuse 10a
• Ign 1 fuse 10a
• Illumination (6 bulbs)
• Ind lamp
• Inflatable restraint sensing & diagnostic module (under driver's seat)
• Instrument cluster
• Interior lights system
• Left bussed electrical center
• Left turn ind
• Logic
• Low washer switch (in washer fluid reservoir)
• Malfunction
• Message center
• Mid bussed electrical center
• Nca
• Oil gauge
• Park/neutral position switch (a/t only) (on left side of transmission)
• Pnk
• Radio
• Radio fuse 10a
• Right turn ind
• S100
• Seat belt ind
• Serial data cl ii
• Shift up ind
• Sp203 (upper left kick panel) g200
• Spare
• Speedometer
• Splice pack
• Tach output
• Tachometer
• Temp gauge
• Trans temp gauge
• Underhood bussed electrical center
• Vehicle control module or powertrain control module (left front of eng compt)
• Volts gauge
• Vss input

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Courtesy Lamps Wiring Diagram for Chevrolet Silverado 1999 2500:

• (4.3l)
• (4.8l, 5.3l, 6.0l)
• A10
• A11
• B11
• B12
• Body control module (on lower left side of dash, below steering column)
• C10
• C12
• C9 c2
• Cargo lamp
• Cargo lamp switch
• Cargo lp sw
• Courtesy lamp relay
• Ctsy lp fuse 15a
• Ctsy lp rly
• D10
• Dome lamp
• Dome lamp defeat switch
• Dome lamp switch
• Dome lp dft
• Dome lp sw
• Dr handle sw
• G110 (left front of engine)
• G119 (right front of engine)
• G200 (upper left kick panel)
• G200 (upper left sp203
• G203 (upper right kick panel)
• Headlamp & panel dimmer switch
• Hot at all times
• I/p compart- ment lamp
• Inadvert rly
• Inadvertant power relay
• Kick panel)
• Lamp request
• Left bussed electrical center (on lower left side of dash)
• Left door courtesy lamp
• Left i/p courtesy lamp
• Left mini wedge (door jamb switch)
• Left power window/door lock switch
• Lt door jamb
• Mid bussed electrical center (under left side of dash, near left kick panel)
• Nca
• Reading lamps
• Right bussed electrical center (on lower right side of dash)
• Right door courtesy lamp
• Right i/p courtesy lamp
• Right mini wedge (door jamb switch)
• Rt door jamb
• S102
• Sp203
• Tan
• Underhood bussed electrical center (on left side of engine compt)
• Underhood lamp assembly

Instrument Illumination Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Instrument Illumination Wiring Diagram for Chevrolet Silverado 1999 2500:

• (4 bulbs)
• (6 bulbs)
• A12
• Ashtray lamp
• Auto
• Automatic transfer case select switch
• B11
• B12
• B5 c1
• Base
• Body control module (on lower left side of dash, below steering column)
• C10
• Dim in
• Driver heated seat switch
• F12
• Fog/ cargo lamp switch
• G200 (upper left kick panel)
• G203 (upper right kick panel)
• Head
• Headlamp & panel dimmer switch
• Hot at all times
• Hvac control module/ blower control switch
• I/p dim
• Illum fuse 10a
• Inflatable restraint i/p module switch
• Instrument cluster
• Int prk fuse 10a
• Left bussed electrical center (on lower left side of dash)
• Left power door lock switch
• Left power window switch
• Left power window/ door lock switch
• Mid bussed electrical center (under left side of dash, near left kick panel)
• Parade mode
• Park
• Park lp rly
• Park lp sig
• Parklamp relay
• Parl lps fuse 30a
• Power window switch
• Radio
• Right bussed electrical center (on lower right side of dash)
• Right heated seat switch
• Right power door lock switch
• Right power window switch
• Right power window/door lock switch
• Roof beacon switch
• Select- able ride switch
• Sp203
• Underhood bussed electrical center (on left side of engine compt)
• Up level

MEMORY SYSTEMS

Driver's Memory Seat Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Driver's Memory Seat Wiring Diagram for Chevrolet Silverado 1999 2500:

• A10
• B/u lps fuse 25a
• Back
• Btsi fuse 10a
• C14
• Driver power seat switch
• Forward/ rearward motor
• Front tilt motor
• Frt dn
• Frt up
• Fwd
• G301 (under driver's seat)
• Hot at all times
• Hot in run
• Ign
• Ign 3 fuse 10a
• Left bussed electrical center
• Left heated/ memory seat switch
• Left power window/ door lock switch
• Memory seat module (underside of driver's seat)
• Mid bussed electrical center
• Mir/lock fuse 3a
• Nca
• Park sw in
• Park/ neutral position switch (left side of transmission)
• Pnk
• Rcl 1
• Rcl 1 sw
• Rcl 2
• Rcl 2 sw
• Rcl back
• Rcl fwd
• Rear dn
• Rear tilt motor
• Rear up
• Recliner motor
• Seats circuit breaker 25a
• Set
• Set sw
• Shift interlock system
• Underhood bussed electrical center

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Chevrolet Silverado 1999 2500

List of elements for Power Distribution Wiring Diagram (1 of 4) for Chevrolet Silverado 1999 2500:

• (4.3l)
• (base) (uplevel)
• (except 4.3l)
• (not used)
• (under left side of dash) mid bussed electrical center
• (upper left kick panel)
• A/c compressor relay
• A/c fuse 10a
• Abs maxifuse 60a
• Air maxi- fuse 30a
• Atc fuse 20a
• Automatic transfer case
• Automatic transfer case control module
• Aux pwr fuse 20a
• Auxiliary power outlet
• B12
• B12 d2
• Bat
• Battery cable junction block
• Blower motor resistor/ relay assembly
• Body control module
• C1 f2
• Cigar fuse 15a
• Cigar lighter
• Ctsy lp fuse 15a
• D11
• D12
• Data link connector (dlc)
• Daytime running lamp (drl) relay
• Drl fuse 10a
• E nca
• E10
• Ecm b fuse 20a
• Electronic brake control module (ebcm)
• F10
• F12
• Fog lps fuse 15a
• Foglamp relay
• From air maxifuse (diagram 1 of 4)
• From rap maxifuse (diagram 1 of 4)
• Frt hvac fuse 30a
• Fuel pump relay
• Full feature driver seat
• Full feature passenger seat
• Fusible link (10 ga- red)
• G200
• Generator
• Hazard fuse 20a
• Headlamp and panel dimmer switch
• Headlamp dimmer switch
• Headlamp relay
• Horn relay
• Inadvertent power relay
• Instrument cluster
• L nca
• Left battery
• Nca
• Park lamps fuse 30a
• Parklamp relay
• Radio
• Radio fuse 15a
• Rap maxifuse 50a
• Rdo amp fuse 15a
• Rear defogger relay
• Red
• Remote control door lock receiver
• Roof becon relay
• Roof becon switch
• Secondary air injection (air) pump relay
• Seo 1 fuse 15a
• Seo 2 fuse 30a
• Sp203
• Starter solenoid
• Stop lps fuse 20a
• Stoplamp switch
• Tbc fuse 10a
• To auxiliary battery relay (diagram 3 of 4)
• To ecm b fuse (diagram 1 of 4)
• To ign a maxifuse (diagram 2 of 4)
• To left bussed electrical center (mir/lock fuse) (diagram 4 of 4)
• To park lamps fuse (diagram 1 of 4)
• Turn/ hazard switch
• Underhood bussed electrical center (on left side of eng compt)
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (vcm)/ powertrain control module (pcm)

Power Distribution Wiring Diagram (2 of 4) for Chevrolet Silverado 1999 2500

List of elements for Power Distribution Wiring Diagram (2 of 4) for Chevrolet Silverado 1999 2500:

• (4.3l)
• (a/t)
• (all others)
• (m/t)
• (not used)
• A/c clutch relay
• A10
• A13
• Acc
• Air bag fuse 15a
• Automatic day-night rearview mirror (w/ compass)
• Automatic transfer case (atc) select switch
• Automatic transmission
• B/u lp fuse 25a
• B11
• Backup lamp switch
• Body control module
• Bulb test
• C10
• Camshaft position (cmp) sensor
• Cellular phone
• Crank fuse 10a
• Cruise control module
• Cruise control switch
• Cruise fuse 10a
• Drl relay
• E11
• Eng 1 fuse 10a
• Evaporative emission (evap) canister purge solenoid
• Evaporative emission (evap) vent solenoid
• Ext lps fuse 10a
• F10
• F11
• From cigar e
• Fuse (diagram 1 of 4)
• Heated oxygen sensor (ho2s) (bank 1 sensor 1)
• Heated oxygen sensor (ho2s) (bank 1 sensor 2)
• Heated oxygen sensor (ho2s) (bank 2 sensor 1)
• Heated oxygen sensor (ho2s) (bank 2 sensor 2)
• Ign 1 fuse 10a
• Ign a maxifuse 40a
• Ign b maxifuse 50a
• Ign c fuse 20a
• Ign e fuse 10a
• Ign o fuse 10a
• Ignition switch
• Inflatable restraint i/p module switch
• Inflatable restraint sensing and diagnostic module
• Instrument cluster
• Left bussed electrical center (on lower left side of dash)
• Mass airflow (maf) sensor
• Mid bussed electrical center (under left side of dash)
• Nca
• O2 a fuse 15a
• O2 b fuse 15a
• Off
• Park/ neutral position switch
• Pnk
• Rear defog relay
• Red
• Retained retained accessory accessory power power relay relay
• Rr hvac fuse 30a
• Rr wiper fuse 15a
• Rr wpr fuse 25a
• Run
• Secondary air injection (air) pump relay
• Selectable ride switch
• Seo ign fuse 10a
• Seq accy fuse 10a
• Start
• Starter relay
• Stud 1
• Stud 1 maxifuse 40a
• Stud 2
• Stud 2 maxifuse 30a
• To htr/ a/c fuse (diagram 3 of 4)
• To ign 1 relay (diagram 3 of 4)
• Turn fuse 20a
• Turn/ hazard switch
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (vcm)/ powertrain control module (pcm)
• Windshield washer motor
• Windshield washer switch
• Ws wiper fuse 25a

Power Distribution Wiring Diagram (3 of 4) for Chevrolet Silverado 1999 2500

List of elements for Power Distribution Wiring Diagram (3 of 4) for Chevrolet Silverado 1999 2500:

• (4.3l)
• (all other gas)
• (all pnk
• (engine harness) s199
• (not used)
• 4.3l
• 4wd fuse 15a
• All other gas
• Automatic transfer case (atc) control module
• Auxiliary battery relay
• Base
• Brake fuse 10a
• C10
• C11
• C12
• Clutch pedal position switch
• Crankshaft position (ckp) sensor
• D10
• E10
• E12
• Ecm 1 fuse 10a
• Electronic brake control module (ebcm)
• Etc fuse 15a
• From cruise fuse (diagram 2 of 4)
• From eng 1 fuse (diagram 2 of 4)
• From fuse link (diagram 1 of 4)
• From ign c fuse (diagram 2 of 4)
• Front axle actuator/ switch
• Fuel injector 1
• Fuel injector 2
• Fuel injector 3
• Fuel injector 4
• Fuel injector 5 (all gas)
• Fuel injector 6
• Fuel injector 7 (4.8l, 5.3l, 6.0l only)
• Fuel injector 8
• G114 (left rear of engine)
• Htr/ a/c fuse 25a
• Hvac 1 fuse 10a
• Hvac blower motor switch
• Hvac control module
• Ign 1 relay
• Ign 3 fuse 10a
• Ignition coil
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Ignition coil 5
• Ignition coil 6
• Ignition coil 7
• Ignition coil 8
• Ignition coil module
• Inj a fuse 15a
• Inj b fuse 15a
• Left bussed electrical center (on lower left side of dash)
• Mega fuse 125a
• Memory seat module
• Memory seat switch
• Mode door motor
• Nca
• Other gas)
• Pnk
• Recirculation door motor
• Red
• Right battery
• Right bussed electrical center (on lower right side of dash)
• Right heated seat switch
• S102
• S104
• S152 (eng pnk harn)
• S154 (eng pnk harn)
• Stoplamp switch
• Temperature door motor
• Underhood bussed electrical center (on left side of engine compt)
• Uplevel
• Vehicle control module (vcm) (4.3l)
• Vehicle control module (vcm)/ powertrain control module (pcm)

Power Distribution Wiring Diagram (4 of 4) for Chevrolet Silverado 1999 2500

List of elements for Power Distribution Wiring Diagram (4 of 4) for Chevrolet Silverado 1999 2500:

• A10
• Base
• C14
• Door lock fuse 20a
• Driver door unlock relay (w/ rke)
• From rap maxifuse (diagram 1 of 4)
• Left bussed electrical center (on lower left side of dash)
• Left full feature seat
• Left memory seat switch
• Left power door lock switch
• Left power seat
• Left power seat switch
• Left power window/ door lock switch
• Memory seat switch
• Mid bussed electrical center (under left side of dash)
• Mir/ lock fuse 3a
• Nca
• Power door lock relay
• Power door unlock relay
• Power mirror switch
• Red
• Retained accessory power relay
• Right full feature seat
• Right memory seat switch
• Right power door lock switch
• Right power seat
• Right power seat switch
• Right power window/ door lock switch
• Seats circuit breaker 25a
• Uplevel

POWER DOOR LOCKS

Power Door Lock Wiring Diagram, Base for Chevrolet Silverado 1999 2500

List of elements for Power Door Lock Wiring Diagram, Base for Chevrolet Silverado 1999 2500:

• 87a
• A12
• B11
• B12
• Body control module (on lower left side of dash, below steering column)
• C1 a11
• C1 b8
• C1 f4
• C11
• C4 a
• C4 d
• C4 m
• Door lock relay
• Dr lk rly
• Dr lock fuse 20a
• Dr unlk rly
• Driver door unlock relay
• Drv dr unlk rly
• E10
• F12
• G200 (upper left kick panel)
• Hot at all times
• Left bussed electrical center (on lower left side of dash)
• Left power door lock actuator
• Left power window/door lock switch
• Lock
• Lock fuse 15a
• Mir/ lock fuse 3a
• Right bussed electrical center (on lower right side of dash)
• Right power door lock actuator
• Right power window/door lock switch
• Splice pack
• Tan
• Unlock
• Unlock fuse 15a
• Unlock jmpr fuse 30a

Power Door Lock Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500

List of elements for Power Door Lock Wiring Diagram, Up Level for Chevrolet Silverado 1999 2500:

• 87a
• A12
• B11
• B12
• Body control module (on lower left side of dash, below steering column)
• C1 a11
• C1 a12
• C1 b8
• C1 f2
• C1 f4
• C11
• C4 a
• C4 d
• C4 m
• Door lock relay
• Dr lock fuse 20a
• Driver door unlock relay
• E10
• F12
• G200 (upper left kick panel)
• Hot at all times
• Left bussed electrical center (on lower left side of dash)
• Left power door lock actuator
• Left power window/door lock switch
• Lock
• Lock fuse 15a
• Mid bussed electrical center (near left kick panel)
• Mir/lock fuse 3a
• Remote control door lock receiver (top center of dash, near instrument cluster)
• Right bussed electrical center (on lower right side of dash)
• Right power door lock actuator
• Right power window/door lock switch
• Splice pack
• Tan
• Tbc fuse 10a
• Underhood bussed electrical center (on left side of engine compt)
• Unlock
• Unlock fuse 15a

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Electrochromic Mirror Wiring Diagram for Chevrolet Silverado 1999 2500:

• A pnk
• A/t
• A11
• Automatic day-night rearview mirror
• B/u lp fuse 25a
• B10
• Back-up lamp switch (left side of trans)
• Back-up lamp switch (left side of trans) c2
• G200 (upper left kick panel)
• Hot in run and start
• Ign 1 fuse 10a
• Left bussed electrical center
• M/t
• Mid bussed electrical center
• Pnk
• Underhood bussed electrical center
• Veh b/u fuse 15a

Power Mirror Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Power Mirror Wiring Diagram for Chevrolet Silverado 1999 2500:

• (upper left kick panel)
• Down
• G200
• Horiz
• Hot at all times
• Interior lights system
• Left
• Left bussed electrical center (lower left side of dash)
• Left mirror motor
• Left power window/ door lock switch c1
• Left power window/ door lock switch
• Mir/ lock fuse 3a
• Nca
• Off
• Power mirror switch
• Right
• Right mirror motor
• Right/ left select switch
• Vert

POWER SEATS

6-Way Power Seat Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for 6-Way Power Seat Wiring Diagram for Chevrolet Silverado 1999 2500:

• (under driver's seat)
• A10
• Back
• C10
• C14
• Driver power seat adjuster switch
• Forward/ rearward motor
• Front dn
• Front tilt motor
• Front up
• Fwd
• G300
• Hot at all times
• Left bussed electrical center (on lower left side of dash)
• Mid bussed electrical center (under left side of dash)
• Passenger power seat adjuster switch
• Rear dn
• Rear tilt motor
• Rear up
• S307
• Seat circuit breaker 25a
• Tan

Heated Seats Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Heated Seats Wiring Diagram for Chevrolet Silverado 1999 2500:

• D12
• Driver heated seat relay (in driver seat)
• Driver seat heated switch
• Driver seat heater element (seat back)
• Driver seat heater element (seat)
• Driver seat thermistor
• G200 (upper left kick panel)
• G203 (upper right kick panel)
• G300 (under driver's seat)
• Gnd
• Heater on ind
• Hot at all times
• Hot in run
• Ign 3 fuse 10a
• Illum
• Interior lights system
• Left bussed electrical center (on left side of eng compt)
• Left bussed electrical center (on lower left side of dash)
• Left power window door lock switch
• Mid bussed electrical center (under left side of dash)
• Nca
• Passenger heated seat relay (in passenger seat)
• Passenger heated seat switch
• Passenger seat heater element (seat back)
• Passenger seat heater element (seat)
• Passenger seat thermistor
• Right bussed electrical center (lower right side of dash)
• Right bussed electrical center (on lower right side of dash)
• S308
• S309
• Sensor
• Seo 2 fuse 30a
• Solid state
• Sp203
• Underhood bussed electrical center (on left side of eng compt)
• Underhood bussed electrical center (on lower left side of dash)

Lumbar Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Lumbar Wiring Diagram for Chevrolet Silverado 1999 2500:

• A10
• Bolster motor
• C10
• C14
• Driver lumbar/ system switch
• G300 (under driver's seat)
• Hot at all times
• Left bussed electrical center (on lower left side of dash)
• Lumbar motor
• Mid bussed electrical center (under left side of dash)
• Nca
• Out
• Pass- enger lumbar/ system switch
• Pnk
• Power seats circuit
• S308
• S309
• S310
• S311
• Seat circuit breaker 25a
• Tan

POWER WINDOWS

Power Window Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Power Window Wiring Diagram for Chevrolet Silverado 1999 2500:

• 87a
• Down
• G200 (upper left kick panel)
• G203 (upper right kick panel)
• Hot acc and run, or with rap energized
• Left bussed electrical center (on lower left side of dash)
• Left down
• Left power window switch
• Left power window/ door lock switch
• Left up
• Pwr wdo circuit breaker 25a
• Right bussed electrical center (on lower right side of dash)
• Right down
• Right power window switch
• Right power window/ door lock switch
• Right up
• Sp203
• Tan
• Wdo dn relay
• Wdo up relay

RADIO

Radio Wiring Diagrams for Chevrolet Silverado 1999 2500

List of elements for Radio Wiring Diagrams for Chevrolet Silverado 1999 2500:

• 4.3l
• Antenna
• Audio rtn
• Bare
• Base
• Battery
• Cruise control module
• D10
• D12
• Dim sig in
• Dim sig out
• Dimmer
• Drain
• E&c line
• Except 4.3l
• G200 (upper left kick panel)
• Ground
• Hot at all times
• Hot with rap relay energized
• Ignition
• Instrument cluster
• Interior lights system
• J c4
• Left bussed electrical center (on lower left side of dash)
• Left front door speaker
• Left rear speaker
• Lf +
• Lf -
• Lr +
• Lr -
• Lt input
• Lt output
• Mid bussed electrical center (near left kick panel)
• Nca
• Park lps
• Pnk
• Powertrain control module (left front of engine compt)
• Premium
• R14 in
• R14 out
• Radio
• Radio fuse 15a
• Rao i fuse 10a
• Remote compact disk player
• Rf +
• Rf -
• Right front door speaker
• Right rear speaker
• Rr +
• Rr -
• Rt input
• Rt output
• Sp203
• Tan
• Underhood bussed electrical center (on left side of engine compt)
• Vehicle control module (left front of engine compt)
• Vss signal

SHIFT INTERLOCKS

Shift Interlock Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Shift Interlock Wiring Diagram for Chevrolet Silverado 1999 2500:

• (upper left kick panel)
• A/t shift lock control solenoid (on steering column)
• A16
• A17
• B/u lps fuse 25a
• Btsi fuse 10a
• G200
• Hot in run or start
• Memory systems
• Nca
• Park/ neutral position switch (left side of transmission)
• Pnk
• Splice pack
• Stoplamp switch (top of brake pedal)
• Underhood junction block

STARTING/CHARGING

Charging Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Charging Wiring Diagram for Chevrolet Silverado 1999 2500:

• (left front of engine compt) vehicle control module/ powertrain control module
• 4.3l
• 4.8l, 5.3l, 6.0l
• Battery cable junction block
• C1 c9 pnk
• C2 b8
• Charge ind
• Computer data lines
• Diesel
• Fusible link (10 ga- red) (gas)
• G108 (left radiator support bracket)
• G110 (4.8l, 5.3l, 6.0l) (left front of engine)
• G110 (4.8l, 5.3l, 6.0l) (right rear of engine)
• G117 (right rear of engine)
• G119 (4.3l) (right front of engine)
• Gas
• Generator
• Generator f terminal
• Generator l terminal
• Hot in run or start
• Ign 1 fuse 10a
• Instrument cluster
• Left battery
• Left bussed electrical center (lower left side of dash)
• Mid bussed electrical center (under left side of dash)
• Not used
• Pnk d8
• Power distribution system
• Red
• Right battery (diesel)
• Solid state
• Splice pack
• Starter solenoid

Starting Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Starting Wiring Diagram for Chevrolet Silverado 1999 2500:

• A/t
• Accy
• Battery cable junction block
• Bulb test
• C1 a6
• C1 c10
• C2 f10
• C7 a
• C7 b
• Clutch pedal position switch (top of clutch pedal)
• Crank fuse 10a
• D11
• F11
• Fusible link (10 ga- red)
• G108 (left radiator support bracket)
• G110 (4.8l, 5.3l, 6.0l) (left front of engine)
• G114 (left rear of engine)
• G119 (4.3l) (right front of engine)
• Hold- in coil
• Ign a fuse 40a
• Ign c fuse 20a
• Ignition switch
• Left battery
• Left bussed electrical center (lower left side of dash)
• Lock
• M/t
• Mid bussed electrical center (under left side of dash)
• Nca
• Off
• Park/ neutral position switch (left side of transmission)
• Power distribution system
• Pull- in coil
• Red
• Run
• S102
• Start
• Starter motor
• Starter motor relay
• Starter solenoid
• Underhood bussed electrical center (left side of engine compt)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraint Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Supplemental Restraint Wiring Diagram for Chevrolet Silverado 1999 2500:

• (under left side of dash) data link connector (dlc)
• A11
• Air bag fuse 15a
• Air bag ind
• Cluster
• Data line
• Driver high
• Driver low
• G200 (upper left kick panel)
• G300 (under driver's seat)
• Ground
• Hot in run or start
• Hot w/ headlamp switch in park or headlamp
• Ign 1 fuse 10a
• Ignition
• Illum fuse 10a
• Indicator lamp
• Inflatable restraint front end discriminating sensor (on underside of radiator support)
• Inflatable restraint i/p module (right side of dash)
• Inflatable restraint i/p module switch
• Inflatable restraint sensing and diagnostic module (under driver's seat)
• Inflatable restraint steering wheel module (steering wheel)
• Inflatable restraint steering wheel module coil
• Instrument
• Interior lights system
• Left bussed electrical center (on lower left side of dash)
• Logic
• Mid bussed electrical center (under left side of dash)
• Nca
• Pass disable
• Pass enable
• Pass high
• Pass low
• Pnk
• Seat belt sig
• Seat belt switch (on driver's seat belt buckle)
• Sensor feed
• Shorting bar
• Solid state
• Tan
• W/ power seats

TRANSMISSION

4.3L

4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500

List of elements for 4.3L VIN W, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500:

• (in engine harness) s107
• (left side of dash) splice pack sp205
• (left side of engine compt)
• (not used) a
• (right rear of engine)
• +5v
• 1-2 shift solenoid
• 1-2 ss
• 2-3 shift solenoid
• 2-3 ss
• 3-2 ctrl solenoid
• 3-2 ss
• 4wd circuit (front axle & transfer case switch)
• 4wd low
• A/t fluid pressure manual valve position switch
• A12
• Automatic transmission (4l60-e)
• Body control module (on lower left side of dash, below steering column)
• Brake fuse 10a
• Brk sw
• C11
• Cls 2 data
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Engine controls
• Engine coolant temperature sensor (left rear of cylinder head)
• Fluid temp sensor
• Frt axle sw
• G117
• G117 (right rear of engine)
• Gnd
• Harness) s105
• Hot at all times
• Hot in run
• Hot in run & start
• Ign
• Ign0 fuse 10a
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Malfunction indicator lamp
• Mid bussed electrical center (lower c1
• Mil ctrl
• Park/neutral position switch (left side of transmission)
• Pc sol hi
• Pc sol lo
• Pnk
• Press ctrl solenoid
• Prnd a
• Prnd b
• Prnd c
• Prnd p
• Range b
• Range c
• Red
• Return
• Rev, lo
• S103
• Stoplamp switch (top of brake pedal)
• Tan
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tft sens sig
• Throttle position sensor (on throttle body assy)
• Tp sig
• Trans rng a
• Underhood bussed electrical center (left side of engine compt)
• Underhood bussed electrical center c2
• Vehicle control module (left front of engine compt)
• Vehicle speed sensor (left rear of transmission)
• Vss high
• Vss low

Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500

List of elements for Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500:

• (left front of engine compt) powertrain control module
• (left front of engine compt) vehicle control module
• (on left front body mount) g102
• (under left side of dash) data link connector
• +8v ref
• +8v ref out
• 2-hi ind
• 4-hi ind
• 4-lo ind
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd sw (lo)
• 4wd sw sig
• 4wd whl lock
• Atc fuse 20a
• Auto
• Automatic transfer case control module (left side of dash, above headlamp switch)
• Auxiliary battery relay
• Awd ind
• Brake control
• Channel-a
• Channel-b
• Channel-c
• Channel-p
• Class ii data
• Ctrl
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Encoder logic
• Encoder motor
• Encoder rtn
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front axle actuator/ switch
• Front drive shaft speed sensor
• Ft axle ctrl
• Ft shaft rtn
• Ft shaft sig
• G102 (on left front body mount)
• G200 (upper left kick panel)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign 3 (run)
• Ign1 fuse 10a
• Illumination lamp (2)
• Instrument cluster
• Interior lights system
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Lock sol out
• Logic
• Mid bussed electrical center (lower c1
• Module gnd
• Motor (ccw)
• Motor (cw)
• Nca
• Neutral ind
• Pnk
• Rear drive shaft speed sensor
• Red
• Rr shaft rtn
• Rr shaft sig
• S199
• Shift motor
• Solid state
• Splice pack sp203
• Splice pack sp205 (left side of dash)
• Tan
• Transfer case select switch
• Underhood bussed electrical center (left side of engine compt)

Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500

List of elements for Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500:

• (left side of engine compt)
• (under left side of dash) data link connector
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• Auxiliary battery relay
• C2 underhood bussed electrical center c2
• Electronic brake control module
• Front axle actuator/ switch
• G102 (on left front body mount)
• Hot in run
• Hot in run & start
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Logic
• Mid bussed electrical center (lower c1
• Pnk
• Powertrain control module (left front of engine compt)
• S199
• Splice pack sp205 (left side of dash)
• Transfer case switch (top left of transfer case)
• Vehicle control module (left front of engine compt)

4.8L

4.8L VIN V, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500

List of elements for 4.8L VIN V, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500:

• (left side of engine compt)
• (not used) a
• +5v
• 1-2 shift solenoid
• 1-2 ss
• 2-3 shift solenoid
• 2-3 ss
• 3-2 ctrl solenoid
• 3-2 ss
• 4wd circuit (front axle & transfer case switch)
• 4wd low
• A/t fluid pressure manual valve position switch
• A10
• A12
• Automatic transmission (4l60-e)
• Body control module (on lower left side of dash, below steering column)
• Brake fuse 10a
• Brk sw
• C11
• Cls 2 data
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Engine coolant temperature sensor (left front of cylinder head)
• Fluid temp sensor
• Frt axle sw
• G117 (right rear of engine)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign
• Ign0 fuse 10a
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Malfunction indicator lamp
• Mid bussed electrical center (lower c1
• Mil ctrl
• Park/neutral position switch (left side of transmission)
• Pc sol hi
• Pc sol lo
• Pnk
• Powertrain control module (left front of engine compt)
• Press ctrl solenoid
• Prnd a
• Prnd b
• Prnd c
• Prnd p
• Range b
• Range c
• Red
• Rev, lo
• S103
• Sens gnd
• Splice pack sp205 (left side of dash)
• Stoplamp switch (top of brake pedal)
• Tan
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tft sens sig
• Throttle position sensor (on throttle body assy)
• Tp sig
• Trans rng a
• Underhood bussed electrical center (left side of engine compt)
• Underhood bussed electrical center c2
• Vehicle speed sensor (left rear of transmission)
• Vss adapter (4wd) (left side of trans)
• Vss high
• Vss low

Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500

List of elements for Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500:

• (left front of engine compt) powertrain control module
• (left front of engine compt) vehicle control module
• (on left front body mount) g102
• (under left side of dash) data link connector
• +8v ref
• +8v ref out
• 2-hi ind
• 4-hi ind
• 4-lo ind
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd sw (lo)
• 4wd sw sig
• 4wd whl lock
• Atc fuse 20a
• Auto
• Automatic transfer case control module (left side of dash, above headlamp switch)
• Auxiliary battery relay
• Awd ind
• Brake control
• Channel-a
• Channel-b
• Channel-c
• Channel-p
• Class ii data
• Ctrl
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Encoder logic
• Encoder motor
• Encoder rtn
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front axle actuator/ switch
• Front drive shaft speed sensor
• Ft axle ctrl
• Ft shaft rtn
• Ft shaft sig
• G102 (on left front body mount)
• G200 (upper left kick panel)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign 3 (run)
• Ign1 fuse 10a
• Illumination lamp (2)
• Instrument cluster
• Interior lights system
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Lock sol out
• Logic
• Mid bussed electrical center (lower c1
• Module gnd
• Motor (ccw)
• Motor (cw)
• Nca
• Neutral ind
• Pnk
• Rear drive shaft speed sensor
• Red
• Rr shaft rtn
• Rr shaft sig
• S199
• Shift motor
• Solid state
• Splice pack sp203
• Splice pack sp205 (left side of dash)
• Tan
• Transfer case select switch
• Underhood bussed electrical center (left side of engine compt)

Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500

List of elements for Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500:

• (left side of engine compt)
• (under left side of dash) data link connector
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• Auxiliary battery relay
• C2 underhood bussed electrical center c2
• Electronic brake control module
• Front axle actuator/ switch
• G102 (on left front body mount)
• Hot in run
• Hot in run & start
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Logic
• Mid bussed electrical center (lower c1
• Pnk
• Powertrain control module (left front of engine compt)
• S199
• Splice pack sp205 (left side of dash)
• Transfer case switch (top left of transfer case)
• Vehicle control module (left front of engine compt)

5.3L

5.3L VIN T, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500

List of elements for 5.3L VIN T, A/T Wiring Diagram, 4L60-E for Chevrolet Silverado 1999 2500:

• (left side of engine compt)
• (not used) a
• +5v
• 1-2 shift solenoid
• 1-2 ss
• 2-3 shift solenoid
• 2-3 ss
• 3-2 ctrl solenoid
• 3-2 ss
• 4wd circuit (front axle & transfer case switch)
• 4wd low
• A/t fluid pressure manual valve position switch
• A10
• A12
• Automatic transmission (4l60-e)
• Body control module (on lower left side of dash, below steering column)
• Brake fuse 10a
• Brk sw
• C11
• Cls 2 data
• D3, d2
• D4, d2
• Data link connector (under left side of dash)
• Ecm1 fuse 10a
• Ecmb fuse 20a
• Ect sig
• Engine coolant temperature sensor (left front of cylinder head)
• Fluid temp sensor
• Frt axle sw
• G117 (right rear of engine)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign
• Ign0 fuse 10a
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Malfunction indicator lamp
• Mid bussed electrical center (lower c1
• Mil ctrl
• Park/neutral position switch (left side of transmission)
• Pc sol hi
• Pc sol lo
• Pnk
• Powertrain control module (left front of engine compt)
• Press ctrl solenoid
• Prnd a
• Prnd b
• Prnd c
• Prnd p
• Range b
• Range c
• Red
• Rev, lo
• S103
• Sens gnd
• Splice pack sp205 (left side of dash)
• Stoplamp switch (top of brake pedal)
• Tan
• Tcc pwm
• Tcc pwm solenoid
• Tcc sol
• Tcc solenoid
• Tft sens sig
• Throttle position sensor (on throttle body assy)
• Tp sig
• Trans rng a
• Underhood bussed electrical center (left side of engine compt)
• Underhood bussed electrical center c2
• Vehicle speed sensor (left rear of transmission)
• Vss adapter (4wd) (left side of trans)
• Vss high
• Vss low

Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500

List of elements for Transfer Case Wiring Diagram, Electronic for Chevrolet Silverado 1999 2500:

• (left front of engine compt) powertrain control module
• (left front of engine compt) vehicle control module
• (on left front body mount) g102
• (under left side of dash) data link connector
• +8v ref
• +8v ref out
• 2-hi ind
• 4-hi ind
• 4-lo ind
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• 4wd sw (lo)
• 4wd sw sig
• 4wd whl lock
• Atc fuse 20a
• Auto
• Automatic transfer case control module (left side of dash, above headlamp switch)
• Auxiliary battery relay
• Awd ind
• Brake control
• Channel-a
• Channel-b
• Channel-c
• Channel-p
• Class ii data
• Ctrl
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• Encoder logic
• Encoder motor
• Encoder rtn
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front axle actuator/ switch
• Front drive shaft speed sensor
• Ft axle ctrl
• Ft shaft rtn
• Ft shaft sig
• G102 (on left front body mount)
• G200 (upper left kick panel)
• Gnd
• Hot at all times
• Hot in run
• Hot in run & start
• Ign 3 (run)
• Ign1 fuse 10a
• Illumination lamp (2)
• Instrument cluster
• Interior lights system
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Lock sol out
• Logic
• Mid bussed electrical center (lower c1
• Module gnd
• Motor (ccw)
• Motor (cw)
• Nca
• Neutral ind
• Pnk
• Rear drive shaft speed sensor
• Red
• Rr shaft rtn
• Rr shaft sig
• S199
• Shift motor
• Solid state
• Splice pack sp203
• Splice pack sp205 (left side of dash)
• Tan
• Transfer case select switch
• Underhood bussed electrical center (left side of engine compt)

Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500

List of elements for Transfer Case Wiring Diagram, Manual for Chevrolet Silverado 1999 2500:

• (left side of engine compt)
• (under left side of dash) data link connector
• 4.3l
• 4.8l, 5.3l & 6.0l
• 4wd fuse 15a
• 4wd indicator lamp
• Auxiliary battery relay
• C2 underhood bussed electrical center c2
• Electronic brake control module
• Front axle actuator/ switch
• G102 (on left front body mount)
• Hot in run
• Hot in run & start
• Ign1 fuse 10a
• Instrument cluster
• Left bussed electrical center (lower left side of dash)
• Left side of dash)
• Logic
• Mid bussed electrical center (lower c1
• Pnk
• Powertrain control module (left front of engine compt)
• S199
• Splice pack sp205 (left side of dash)
• Transfer case switch (top left of transfer case)
• Vehicle control module (left front of engine compt)

WARNING SYSTEMS

Warning System Wiring Diagrams for Chevrolet Silverado 1999 2500

List of elements for Warning System Wiring Diagrams for Chevrolet Silverado 1999 2500:

• (3.4l)
• (all others)
• (base seat)
• (full feature seat)
• (pwr seat)
• A11
• A12
• B11
• Base
• Battery
• Body control module (on lower left side of dash, below steering column)
• C10
• C11
• Cruise fuse 10a
• Door jamb sw in
• F10
• G200 (upper left kick panel)
• G300 (under driver's seat)
• Ground
• Hdlmp rly cntrl
• Head- lamp and panel dimmer switch
• Hot at all times
• Hot in accy or run
• Hot in run
• Hot with park lights on
• Ign 1 fuse 10a
• Ignition 1
• Ignition 3
• Instrument cluster
• Int prk fuse 10a
• Key in ign
• Key-in ignition switch
• Left bussed electrical center
• Left mini wedge switch
• Left power window/ door lock switch
• Logic
• Mid bussed electrical center
• Nca
• Park lights in
• Pnk
• Powertrain control module (pcm) (left frt of eng compt)
• Seat belt ind
• Seat belt input
• Seat belt switch (on driver's seat belt buckle) (base seat)
• Serial data
• Sp203
• Sp205 (left side of dash)
• Tan
• Tbc fuse 10a
• Underhood bussed electrical center
• Uplevel

WIPER/WASHER

Wiper/Washer Wiring Diagram for Chevrolet Silverado 1999 2500

List of elements for Wiper/Washer Wiring Diagram for Chevrolet Silverado 1999 2500:

• Control logic
• G108 (left radiator support bracket)
• G114 (left rear of engine)
• Hot in acc or run
• Left bussed electrical center (on lower left side of dash)
• Mist
• Nca
• Off
• Pnk
• Pulse
• Red
• S100
• S102
• Underhood bussed electrical center
• Underhood bussed electrical center (on left side of engine compt)
• W/w pmp fuse 15a
• Washer switch
• Wind- shield wiper/ washer switch
• Windshield washer pump (in washer fluid reservoir)
• Windshield wiper motor module
• Wiper switch
• Ws wiper fuse 25a