GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Control Module (BCM) Connector C1, Brown (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Body Control Module (BCM) Connector C2, Blue (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Body Control Module (BCM) Connector C3, Purple (16 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control Systems

Body Control System Connector End Views in Body Control Systems

Body Relay Block

LH side of dash, near IP fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Data Link Connector

Lower LH side of instrument panel

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Electronic Brake Control Module (Part of Brake Pressure Modulator Valve)

LH front fenderwell between the Underhood Bussed Electrical Center and Grommet P100

Antilock Brake System Component Views in ABS/ Traction Control in Brakes

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Electronic Brake Control Module (Part of Brake Pressure Modulator Valve) Connector C2 (2 Cavities)

Body harness connector on LH of Electronic Brake Control Module/Brake Pressure Modulator Valve

Antilock Brake System Component Views in ABS/ Traction Control in Brakes

Antilock Brake System Connector End Views in ABS/ Traction Control

Front Axle Switch

Front axle, right of differential

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

IP Fuse Block

LH side of the IP near the left front side door jamb switch

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Stop Lamp Switch

Mounted on brake pedal

Lighting Systems Component Views in Wiring Systems

Lighting Systems Connector End Views in Wiring Systems

Transfer Case Encoder Motor C1 (2 Cavities) (Bravada) (w/Auto 4WD)

RH of the ATC, below the rear transfer case speed sensor connector

Transfer Case Control Component Views in Transfer Case NV136

Transfer Case Control Connector End Views in Transfer Case NV136

Transfer Case Encoder Motor C2 (6 Cavities) (Bravada) (w/Auto 4WD)

Top of transfer case, left side

Transfer Case Control Component Views in Transfer Case NV136

Transfer Case Control Connector End Views in Transfer Case NV136

Transfer Case Encoder Motor C1 (4 Cavities) (w/Push Button Control)

RH of the ATC, below the rear transfer case speed sensor connector

Transfer Case Control Component Views in Transfer Case NV233

Transfer Case Control Connector End Views in Transfer Case NV233

Transfer Case Encoder Motor C2 (6 Cavities) (w/Push Button Control)

Top of transfer case, left side

Transfer Case Control Component Views in Transfer Case NV233

Transfer Case Control Connector End Views in Transfer Case NV233

Transfer Case Shift Control Module C1 (32 Cavities) (Bravada)

Behind RH Front kick panel, the lower connector

Transfer Case Control Component Views in Transfer Case - NV 136

Transfer Case Control Connector End Views in Transfer Case - NV 136

Transfer Case Shift Control Module C2 (4 Cavities) (Bravada)

Behind RH Front kick panel, the upper connector

Transfer Case Control Component Views in Transfer Case - NV 136

Transfer Case Control Connector End Views in Transfer Case - NV 136

Transfer Case Select Switch (w/Push Button Control ) Connector C1 (8 Cavities)

Right side of instrument panel cluster

Transfer Case Control Component Views in Transfer Case - NV 233

Transfer Case Control Connector End Views in Transfer Case - NV 233

Transfer Case Select Switch (w/Push Button Control ) Connector C2 (4 Cavities)

Right side of instrument panel cluster

Transfer Case Control Component Views in Transfer Case - NV 233

Transfer Case Control Connector End Views in Transfer Case - NV 233

Transfer Case Speed Sensor, Front (w/Auto 4WD) (Bravada)

Top LH Rear of the Transfer Case

Transfer Case Control Component Views in Transfer Case NV136

Transfer Case Control Connector End Views in Transfer Case NV136

Transfer Case Speed Sensor, Rear (w/Auto 4WD) (Bravada)

Top RH Rear of the Transfer Case near the rear drive shaft

Transfer Case Control Component Views in Transfer Case NV136

Transfer Case Control Connector End Views in Transfer Case NV136

Underhood Fuse Block

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

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Underhood Fuse Block Connector C1 (Body, 68 Cavities)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C2 (4.3L Engine, 68 Cavities)

Below the Underhood Fuse Block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (4.3L Engine)

RH side of engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

Engine Controls Connector End Views in Engine Controls - 4.3L

Vehicle Control Module (VCM) (4.3L Engine) Connector C4 (24 Cavities)

RH side of engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

Engine Controls Connector End Views in Engine Controls - 4.3L

C101 (Engine Harness to Body Harness) (4.3L Engine, 10 Cavities)

RH engine compartment, near VCM

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C108 Transfer Case extension harness to Body Harness) (7 Cavities)

LH rear engine compartment near cowl penetration P100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C114 Body harness to front axle switch extension harness) (2 Cavities)

LH center of engine compartment, near the electronic brake control module)

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C203 (Body Harness to IP Harness) (116 Cavities)

RH side of dash

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103 (Circuit 351, 4.3L Engine Harness)

LH rear of engine block

Harness Routing Views in Wiring Systems

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G105 (Circuit 451, 4.3L Engine Harness)

RH rear of engine block

Harness Routing Views in Wiring Systems

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G117 (Circuit 850, Body Harness)

LH rear of engine compartment, near cruise control module

Harness Routing Views in Wiring Systems

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G203 Circuit 1050, Body Harness)

RH Dash panel, between IP Body Connector C203 and Splice Packs

Harness Routing Views in Wiring Systems

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G204 Circuit 1050, Body Harness)

RH Dash panel, between IP Body Connector C203 and Splice Packs

Harness Routing Views in Wiring Systems

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G205 Circuit 1050, Body Harness)

RH Dash panel, between IP Body Connector C203 and Splice Packs

Harness Routing Views in Wiring Systems

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P100 (IP Bulkhead Pass-Through)

LH rear of engine compartment, on cowl

Harness Routing Views in Wiring Systems

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S106 (Circuit 351, 4.3L Engine Harness)

Between the breakouts to the connector for the rear oxygen sensors and the body harness connector, 6.5 cm from the breakout to the oxygen sensor connector

Harness Routing Views in Wiring Systems

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S118 (Circuit 850, Body Harness W/ 4.3L Engine)

Between the Vehicle Control Module breakout and the Blower Motor Relay breakout, 25 cm from the breakout to the VCM

Harness Routing Views in Wiring Systems

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S121 (Circuit 1695, Body Harness

Between the breakouts to the VCM and the blower motor relay, 13 cm from the breakout to the VCM

Harness Routing Views in Wiring Systems

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S152 (Circuit 351, 413, and 451, 4.3L Engine Harness)

Between the breakouts for the LR and RR engine block grounds, 15 cm from the breakout to the LR engine grounds

Harness Routing Views in Wiring Systems

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S205 (Circuit 1220, IP Harness W/O Auto A/C)

Between the breakouts for the radio and Truck Body Control Module Connector C3, 8 cm from the breakout to the radio

Harness Routing Views in Wiring Systems

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S205 (Circuit 1220, IP Harness, W/ Auto A/C)

Between the breakouts for the radio and Truck Body Control Module Connector C3, 8 cm from the breakout to the radio

Harness Routing Views in Wiring Systems

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S208 (Circuit 40, IP Harness, W/ Auto A/C)

Between the breakouts for the truck body control module Connector C3 and the radio, 6 cm from the breakout to the truck body control module

Harness Routing Views in Wiring Systems

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S208 (Circuit 40, IP Harness, W/O Auto A/C)

IP Harness lower center, between the breakouts for the radio and RH courtesy lamps, 4 cm from the breakout to the courtesy lamp

Harness Routing Views in Wiring Systems

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SP200 (Circuits 41, 241, 341, 817 Splice Pack, Body Harness)

Strapped to the body harness in the center front of dash area, to the right of SP204

Harness Routing Views in Wiring Systems

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SP201 (Data Link Connector Spice Pack, Body Harness)

LH side of dash panel, below IP Fuse Block

Harness Routing Views in Wiring Systems

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SP203 (Circuit 1050 Splice Pack, IP Harness, W/ Auto A/C)

On the IP Assembly, in front of the IP ashtray assembly

Harness Routing Views in Wiring Systems

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SP203 (Circuit 1050 Splice Pack, IP Harness, W/O Auto A/C)

On the IP Assembly, in front of the IP ashtray assembly

Harness Routing Views in Wiring Systems

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SP204 (Circuits 584, 1414, 1415 Splice Pack, Body Harness)

Strapped to the body harness in the center front of dash area, to the left of SP200

Harness Routing Views in Wiring Systems

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