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1999 GMT400 Wiring Diagrams

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Transmission Specific

1999 4L60e auto trans, VCM

1999 4l60e shift solenoids

1999 4l60e VSS, 4wd, upshift controls

1999 diesel 4l80e pcm, trans, iss

1999 diesel 4l80e PCM, VSS, Transfercase

1999 diesel 4l80e trans, TCC, PCM

1999 gas 4l80e auto trans vcm

1999 gas 4l80e auto trans, fuses, stoplamp

1999 gas 4l80e fuses, trans VCM

1999 gas 4l80e VCM auto trans

1999 gas 4l80e, VSS, VCM, cruise control


Air Bag & Anti Theft

1999 IP Module, Steering wheel module, discriminating sensor

1999 Power, GND, and DLC

1999 Theft deterrent system


Battery

1999 Aux battery


Body and Body control

1999 Door Jamb, vanity mirros, courtesy lamps

1999 door lock motor and lock inversion module

1999 fuses, stereo controller rear and headlamp control module

1999 shock sensor, cargo door lock and seatbelt switch

1999 luxury door lock motors and BCM

1999 luxury door locks and fuses

1999 Cig ltr fuse, door lock control module, rear door jamb, rear door lock

1999 door jamb switches

1999 pickup-extended cab PWR ACCY circuit, door lock switches, lock motors

1999 PWR ACCY circuit, door lock switches, lock motors

1999 cig ltr fuse, liftgate release, PN position switch

1999 luxury cig ltr fuse, liftgate release, PN position switch


Brakes

1999 parking brake system

1999 diesel VSS, TCC signal, brake indicator

1999 Gas VSS, TCC signal, Brake indicator

1999 indicator control and wheel speed sensors

1999 Ignition switch, DRL module

1999 ignition switch, EBCM, Brake pressure warning


Cell Communication and Onstar

1999 cellular inline harness

1999 cellular inline with handset

1999 escalate 3 button hands free cellular

1999 luxury with handset


Cigarette Lighter and Outlets

1999 cig lighter, power outlet


Cruise Control

1999 diesel cruise control

1999 gas brake, stop haz, cruise fuses

1999 gas cruise control module, VCM


Data Link

1999 data link connector


Defogger

1999 mirrors fuse, heated mirrors, and mirror relay

1999 rear defogger, HVAC module, window defogger


5.0L & 5.7L Engine Controls

1999 5.0, 5.7 4l60e controls

1999 5.0, 5.7 4L60e shift solenoids

1999 5.0, 5.7 4l80e controls

1999 5.0, 5.7 4wd, IAC, upshift

1999 5.0, 5.7 AC controls

1999 5.0, 5.7 AIR pump controls

1999 5.0, 5.7 engine sensors

1999 5.0, 5.7 EVAP, EGR

1999 5.0, 5.7 fuel controls

1999 5.0, 5.7 fuel injector controls

1999 5.0, 5.7 HO2S 2

1999 5.0, 5.7 HO2S

1999 5.0, 5.7 ignition controls

1999 5.0, 5.7 power ground and DLC

1999 5.0, 5.7 shift solenoids

1999 5.0, 5.7 VSS, cruise control


5.0L & 5.7L Alternate Fuel Engine Controls

1999 5.0, 5.7 alt fuel AC controls

1999 5.0, 5.7 alt fuel connector 1

1999 5.0, 5.7 alt fuel connector 2

1999 5.0, 5.7 alt fuel EVAP, EGR

1999 5.0, 5.7 alt fuel ho2s

1999 5.0, 5.7 alt fuel ignition controls

1999 5.0, 5.7 alt fuel power ground, DLC

1999 5.0, 5.7 alt fuel trans controls

1999 5.0, 5.7 alt fuel VCM and engine sensors

1999 5.0, 5.7 alt fuel VSS, cruise control

1999 5.0, 5.7 alt fuel, 4wd, IAC, upshift


7.4L Engine Controls

1999 7.4 4wd, IAC, Upshift

1999 7.4 AC controls

1999 7.4 engine sensors

1999 7.4 EVAP, EGR

1999 7.4 fuel controls

1999 7.4 fuel injector controls

1999 7.4 HO2S

1999 7.4 Ignition

1999 7.4 PWR, GRD, DLC

1999 7.4 shift solenoids

1999 7.4 trans controls

1999 7.4 VMC, underhood fuse relay

1999 7.4 VSS, cruise control


6.5L Diesel Engine Controls

1999 6.5 4wd and cruise control

1999 6.5 AC controls

1999 6.5 EGR, MAF, accelerator pedal

1999 6.5 engine sensors

1999 6.5 fuel controls 2

1999 6.5 fuel controls

1999 6.5 glow plugs

1999 6.5 ignition controls

1999 6.5 pwr, gnd, DLC

1999 6.5 trans and TCC controls

1999 6.5 trans controls

1999 6.5 VSS controls


5.0L & 5.7L CNG Engine Controls

1999 5.0, 5.7 CNG data sensors, ho2s

1999 5.0, 5.7 CNG Engine data sensors, FTP, MAP, EGR, IAT

1999 5.0, 5.7 CNG engine data sensors, GMS-MCV

1999 5.0, 5.7 CNG fuel controls, fuel gauge

1999 5.0, 5.7 CNG fuel pump

1999 5.0, 5.7 CNG ignition system

1999 5.0, 5.7 CNG lock off solenoids

1999 5.0, 5.7 CNG MAF, VSS

1999 5.0, 5.7 CNG power, ground, MIL, DLC

1999 5.0, 5.7 CNG TP, ECT, FPS, FTS

1999 5.0, 5.7 CNG, VCM 1

1999 5.0, 5.7 CNG VCM 2

1999 5.0, 5.7 CNG VCM 3


Engine Cooling

1999 cooling fan


Garage Opener

1999 garage door opener except luxury

1999 luxury garage door


Ground Distribution

1999 cell 14 g101, g102, g108, g110, g111, g115

1999 cell 14 g103, g104

1999 cell 14 g105 1

1999 cell 14 g105 2

1999 cell 14 g112

1999 cell 14 g113

1999 cell 14 g200 1

1999 cell 14, g200 2

1999 cell 14 g200 3

1999 cell 14 g200 4

1999 cell 14 g201, g300, g404

1999 cell 14 g202 1

1999 cell 14 g202 2

1999 cell 14 g202 3

1999 cell 14 g202 4

1999 cell 14 g400

1999 cell 14 g401, g403 dually pickup

1999 cell 14 g401, g403

1999 diesel cell 11


Horn

1999 horn


HVAC

1999 aux HVAC controls

1999 front HVAC blower

1999 front vent controls 1

1999 front vent controls 2

1999 HVAC compressor control 1

1999 HVAC compressor control 2

1999 rear blower control relats motors

1999 rear blower control switches

1999 rear vent controls 1

1999 rear vent controls 2

1999 front HVAC blower motor

1999 rear blower control motor and relays

1999 rear blower control switches


Instrument Panel, Gagues, Console

1999 cluster electronic PRNDL

1999 diesel fuel gauge sender

1999 diesel indicator lamps

1999 fuel gauge sender dual tank

1999 fuel gauge sender single tank

1999 gauges

1999 indicator lamps

1999 audible warnings except luxury

1999 luxury audible warnings


Exterior Lighting

1999 backup lights

1999 DRL module and relay

1999 fog lamps, switch, relay

1999 headlamp and panel dimmer

1999 headlamps

1999 lighting fues 8

1999 luxury DRL module and relay

1999 luxury headlamp and panel dimmer

1999 quad and base headlamps

1999 z71-limited fog lights


Interior Lighting

1999 btsy fuse 3, illuminated vanity mirrors

1999 courtesy lamps and rearview mirror switch

1999 courtsey lamps and door jambs

1999 ctsy fuse 3, door jamb switches

1999 dome lamps and reading lamps

1999 fuses, headlamp, panel dimmer, window switches

1999 gauges fuse 4, interior lamp control

1999 heated seat switches and body control module

1999 horn fuse, cig ltr fuse 13, underhood and reel lamps

1999 illuminated mirrors

1999 IP ground

1999 overhead console reading and dome lamps

1999 PK lamps fuse 9, illum fuse 14, headlamp panel dimmer 1

1999 PK lamps fuse 9, illum fuse 12, headlamp and panel dimmer 2

1999 power window switch illuination

1999 rear dome and reading lamps, door courtesty lamps

1999 underhood reel lamp


Mirrors

1999 automatic day night mirrors

1999 fuse block HVAC control

1999 heated mirror relay, mirrors

1999 luxury power outside rearview mirrors

1999 power outside rearview mirrors except luxury


Power Distribution

1999 cell 10 ABS, Blower, Stop fuses and brake lamp relay

1999 cell 10 air bag, turn b-u, crank and trans fuses

1999 cell 10 aux fues and pwr-accy circuit breaker

1999 cell 10 aux fuses and pwr accy circuit breaker luxury

1999 cell 10 battery and underhood fuse block

1999 cell 10 brake and hrt-ac fuses

1999 cell 10 cig ltr fuse

1999 cell 10 cruise and 4wd fuses

1999 cell 10 ecm 1 fuse 5.0, 5.7

1999 cell 10 ecm 1 fuse 7.4

1999 cell 10 ecm-b, horn, and ac comp fuses

1999 cell 10 eng 1 and ecm 1 fuses 6.5

1999 cell 10 eng-1 fuse

1999 cell 10 front rear heated seats mirror, aux fan, rr defog fuses

1999 cell 10 gauges fuse

1999 cell 10 ign A fuse and ignition switch

1999 cell 10 ign B fuse and ignition switch

1999 cell 10 ign e fuse

1999 cell 10 illum fuse

1999 cell 10 lighting and battery fuses

1999 cell 10 RR HVAC fuse

1999 cell 10 RR wiper, wiper, radio and pwr wdo circuit breaker

1999 cell 10 security-strg, pk lps, and drl fog fuses

1999 cell 10 stop-hax, radio batt, and aux pwr fuses

1999 cell 10 tcase, ctsy fuses 1

1999 cell 10 tcase, ctsy fuses 2


Radio and Entertainment

1999 cig ltr fuse, power amp and relay, rear door speakers

1999 radio and radio batt fuses, radio, roof speakers, front speakers

1999 radio and radio batt fuses, radio, speakers

1999 remote playback unit

1999 luxury audio amplifier

1999 luxury cd changer

1999 luxury stereo controller rear


Retained Accessory Power

1999 retained accessory power


Seats

1999 cig ltr fuse, power lumbar seat switches and motors 2

1999 cigltr fuse, power lumbar seat switches and motors 1

1999 park lps, and heated seats rear fuses, LR heated seat module luxury

1999 power seats

1999 pwr accy circuit breaker, lumbar support switches and motors (bucket seats)

1999 RF heated seat module, heated seat switch

1999 RR heated seat module

1999 RR hvac and front heated seats fuses, LF heated seat module


Starting and Charging

1999 diesel generator

1999 diesel starter controls

1999 Gas generator

1999 gas starter controls


Steering

1999 shift lock control

1999 steering assist


Upfitter

1999 aux roof lamp

1999 grill lights and speaker wiring

1999 megafuse aux power relay center with 6j1

1999 megafuse, aux power center with 9l4

1999 roof mounted accessories


Windows

1999 pk lps fuse, pwr wdo circuit breaker, power window master switch, left front motor (crew cab, suburban, utility)

1999 pk lps fuse, pwr wdo circuit creaker, pwer window switches and motors

1999 rt front pwr windows and lock switches, window motor, rear switches and motors


Windshield Wipers and washers

1999 wiper washer system pulse

1999 wiper washer system rear


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