AIR CONDITIONING – Chevrolet Suburban K1500 1999 – SYSTEM WIRING DIAGRAMS

AIR CONDITIONING

5.7L

5.7L VIN R, Compressor Wiring Diagram for Chevrolet Suburban K1500 1999

List of elements for 5.7L VIN R, Compressor Wiring Diagram for Chevrolet Suburban K1500 1999:

• (engine harn, near diode)
• 22 cm from ebcm breakout)
• A/c comp fuse 10a
• A/c compressor clutch
• A/c compressor clutch relay (in underhood fuse block)
• A/c compressor cycling switch (in low pressure line, on accumulator)
• A/c control
• A/c disable
• A/c high pressure cutout switch (on a/c compressor)
• A/c low pressure cutout switch (on a/c compressor)
• A/c req
• A/c switch
• Blower switch
• Diode
• Fuse block
• G104 (top right side of cylinder head)
• G105 (right side of engine)
• Hot in run
• Hot in run or start
• Htr a/c fuse 12 25a
• Hvac control module
• Ign e fuse 10a
• Ignition
• Near egr valve breakout)
• Off
• Pnk
• S146 (eng harn, pnk
• S185
• S186
• S268 (i/p harn, behind center of dash)
• Sw sig
• Underhood fuse block
• Vehicle control module (left side of engine compt)

5.7L VIN R, Heater Wiring Diagram for Chevrolet Suburban K1500 1999

List of elements for 5.7L VIN R, Heater Wiring Diagram for Chevrolet Suburban K1500 1999:

• (left kick panel) g203
• 5-volt ref
• A/c compressor solenoid valve (rear of a/c compressor)
• Batt pos voltage
• Battery positive voltage
• Blower motor (bottom of hvac casing)
• Blower motor control module (behind right center of dash)
• Blower mtr spd ctrl
• Blwr mtr spd ctrl
• Blwr mtr sply volt
• Computer data lines system
• Data serial gmlan low spd
• Defogger system
• Driver information center display
• Ele variable displacement ctrl
• Ele variable displacement sply
• Front blwr mtr rtn
• Fuse 11 40a
• Fuse 17 10a
• Fuse 19 10a
• G302 (right kick panel)
• Gnd
• Ground
• Hot at all times
• Hot w/ ignition main relay energized
• Humidity sens sig
• Humidity temp sens sig
• Hvac control module (center of dash)
• Inside air temp sens low ref
• Inside air temp sens sig
• Instrument cluster
• Instrument panel fuse block (left side of dash)
• Ip run/ crank fuse (2.0l) 5a
• J203
• J204
• J206
• Linear interconnect network bus 9
• Logic
• Low speed gmlan serial data
• Rear defog rly ctrl
• Red
• Run/crank ignition 1 volt
• Temp sens low ref
• Twilight sentinel delay signal
• Underhood fuse block (left side of battery)
• Windscreen temp sens sig
• Windshield temperature & inside moisture sensor (if equipped) (top center of windshield)
• X115
• X210

5.7L VIN R, Heater Wiring Diagram, Auxiliary for Chevrolet Suburban K1500 1999

List of elements for 5.7L VIN R, Heater Wiring Diagram, Auxiliary for Chevrolet Suburban K1500 1999:

• 87a
• A/c
• A/c clutch fuse 10a
• A/c-on ind
• A/c-on switch
• Blower switch
• Bus 9
• Cfan k1 fuse 30a
• Cfan k2 fuse 30a
• Compressor clutch relay
• Computer data lines system
• Cooling fan high speed relay
• Cooling fan low speed relay
• Cooling fan speed control relay
• Defrost & lower air outlet ind
• Defrost & lower air outlet switch
• Driver information center display
• Engine controls ignition relay
• Fan relay a fuse 10a
• G101 (left front of engine compt)
• G106 (upper left radiator support)
• G122 (rear of engine on cylinder head)
• G205 (right kick panel)
• Gnd
• Heater coolant pump (near transmission)
• Hot at all times
• Hot w/ engine controls ignition relay energized
• Hvac controls
• J101
• J118 (near left headlamp assembly)
• J120
• Left cooling fan motor (left side of radiator)
• Logic
• Lower outlet ind
• Lower outlet switch
• Recircu- lation ind
• Recircu- lation switch
• Red
• Right cooling fan motor (right side of radiator)
• Temperature control switch
• Underhood fuse block (left side of battery)
• Upper & lower air outlet ind
• Upper & lower air outlet switch
• Upper outlet ind
• Upper outlet switch
• Windshield defrost ind
• Windshield defrost switch
• X116

5.7L VIN R, Manual A/C Wiring Diagram for Chevrolet Suburban K1500 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram for Chevrolet Suburban K1500 1999:

• (not used)
• A/c compressor clutch (lower left front of engine)
• A/c evaporator temperature sensor (right center of hvac casing)
• Ambient light/sunload sensor (top center of dash)
• Anti-theft system
• Auxiliary heater coolant pump relay
• Battery fuse block (on battery)
• Cabin htr cool pmp fuse 15a
• Duct left lower air temperature sensor (left side of hvac casing)
• Duct left upper air temperature sensor (top left of hvac casing)
• Duct right lower air temperature sensor (right side of hvac casing)
• Duct right upper air temperature sensor (top right of hvac casing)
• Ecm fuse 20a
• Fuse 250a
• G122 (rear of engine on cylinder head)
• Headlights system
• Hot at all times
• Hot w/ engine controls ignition relay energized
• J108
• J120
• J123
• J231 (left side of dash, 49 cm from breakout of x500)
• Logic
• Non walk o2 fuse 10a
• Red
• Underhood fuse block (left side of battery)
• X215

5.7L VIN R, Manual A/C Wiring Diagram, Auxiliary (1 of 2) for Chevrolet Suburban K1500 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram, Auxiliary (1 of 2) for Chevrolet Suburban K1500 1999:

• (2.4l: right rear of engine) (except 2.4l: top rear of engine) (except 2.4l) engine coolant temperature sensor 1 (2.4l) engine coolant temperature sensor
• (hvac module harness, center of dash) j217
• (left side of engine compt) engine control module (ecm)
• (left side of engine near thermostat) (except 2.4l) engine coolant thermostat heater
• (lower right side of radiator) (except 2.4l) engine coolant temperature sensor 2
• (right side of a/c condenser) a/c refrigerant pressure sensor
• 2.4l
• 5v volt ref
• A/c low ref
• A/c press sens sig
• Air inlet dr stepper mtr ctrl
• Air recirculation door motor (behind center of dash)
• Cmprsr clutch rly ctrl
• Computer data lines system
• Cooling fan relay ctrl
• Eng cool ctrl
• Eng temp sens sig
• Evap core temp sens sig
• Except 2.4l
• G121 (on engine rear of a/c compressor)
• Gmlan serial data (+)
• Gmlan serial data (-)
• Hvac control module (center of dash)
• J121
• Left air temperature door actuator (left center of hvac casing)
• Low ref
• Lower left air temp sens sig
• Lower right air temp sens sig
• Main relay fused sply
• Mode door actuator (driver side of hvac casing)
• Mode dr stepper motor ctrl
• Right air temp door pos sig
• Right air temp motor ctrl
• Right air temperature door actuator (right center of hvac casing)
• Sens lo ref
• Sig gnd
• Temp dr stepper motor ctrl
• Temp sens low ref 2
• Temp sens sig 2
• Upper left air temp sens sig
• Upper right air temp sens sig
• X117

5.7L VIN R, Manual A/C Wiring Diagram, Auxiliary (2 of 2) for Chevrolet Suburban K1500 1999

List of elements for 5.7L VIN R, Manual A/C Wiring Diagram, Auxiliary (2 of 2) for Chevrolet Suburban K1500 1999:

• (left kick panel) g203
• Batt pos voltage
• Battery positive voltage
• Blower motor (bottom of hvac casing)
• Blower motor control module (behind right center of dash)
• Blower mtr spd ctrl
• Blwr mtr spd ctrl
• Blwr mtr sply volt
• Computer data lines system
• Defogger system
• Ele variable displacement ctrl
• Ele variable displacement sply
• Front blwr mtr rtn
• Fuse 11 40a
• Fuse 17 10a
• Fuse 19 10a
• G302 (right kick panel)
• Gnd
• Ground
• Hot at all times
• Hvac control module (center of dash)
• Instrument panel fuse block (left side of dash)
• J203
• J204
• J206
• Linear interconnect network bus 9
• Low speed gmlan serial data
• Rear defog rly ctrl
• Red
• X115
• X210

6.5L

6.5L VIN F, Compressor Wiring Diagram for Chevrolet Suburban K1500 1999

List of elements for 6.5L VIN F, Compressor Wiring Diagram for Chevrolet Suburban K1500 1999:

• (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 Chevrolet Suburban K1500 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram for Chevrolet Suburban K1500 1999:

• (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 Chevrolet Suburban K1500 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Auxiliary (1 of 2) for Chevrolet Suburban K1500 1999:

• (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 Chevrolet Suburban K1500 1999

List of elements for 6.5L VIN F, Manual A/C Wiring Diagram, Auxiliary (2 of 2) for Chevrolet Suburban K1500 1999:

• (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)