GROUND DISTRIBUTION – GMC Sierra 2500 1999 – SYSTEM WIRING DIAGRAMS

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 3) for GMC Sierra 2500 1999

List of elements for Ground Distribution Wiring Diagram (1 of 3) for GMC Sierra 2500 1999:

• (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 GMC Sierra 2500 1999

List of elements for Ground Distribution Wiring Diagram (2 of 3) for GMC Sierra 2500 1999:

• (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 GMC Sierra 2500 1999

List of elements for Ground Distribution Wiring Diagram (3 of 3) for GMC Sierra 2500 1999:

• (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