GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

ABS Indicator Relay

On the right top of the IP, under the access panel, in relay center 1

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

Antilock Brake System Connector End Views in Antilock Brake System

Brake Fluid Level Switch

Behind the left side of the front crossmember on the front of the brake master cylinder reservoir

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Data Link Connector (DLC)

On the left side of the lower IP

Data Link Communications Component ViewsWiring Systems

Data Link Communications Connector End Views in Wiring Systems

Electronic Brake Control Module (EBCM) (ABS-Hydraulic)

On the rear of the #1 crossmember

Antilock Brake System Component Views in Antilock Brake Systems

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Electronic Brake Control Module (EBCM) (ABS-Hydraulic) C1 (2 cavities)

In the front chassis harness to the EBCM

Antilock Brake System Component Views in Antilock Brake Systems

Antilock Brake System Connector End Views in Antilock Brake System

Electronic Brake Control Module (EBCM) (ABS-Hydraulic) C2 (24 cavities)

In the front chassis harness to the EBCM

Antilock Brake System Component Views in Antilock Brake Systems

Antilock Brake System Connector End Views in Antilock Brake System

Hazard Flasher

On the steering column, on the left side of the turn/hazard switch

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Instrument Panel Cluster (IPC)

On the left side of the IP

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

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Instrument Panel Cluster (IPC) C1 (15 cavities)

In the upper IP harness to the IPC

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Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges, and Console

Instrument Panel Cluster (IPC) C2 (9 cavities)

In the upper IP harness to the IPC

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Instrument Panel, Gages, and Console Connector End Views in Instrument Panel, Gauges, and Console

IP Fuse Block

In the right top of the IP, under the access panel

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

Power and Grounding Connector End Views in Wiring Systems

Inverting Driver Module

Under the right seat

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

Lighting Systems Connector End Views in Lighting Systems

MaxiFuse® Block 2

On the left rear of the cab, below the cab bridge

Power and Grounding Component Views in Wiring Systems

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Multifunction Alarm Module (MFAM) (Hydraulic Brakes)

Under the right seat

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

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Multifunction Alarm Module (MFAM) (Hydraulic Brakes) C1 (16 cavities)

In the lower IP harness to the MFAM

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

Audible Warnings Connector End Views in Instrument Panel, Gauges, and Console

Multifunction Alarm Module (MFAM) (w/ Automatic Engine Shutdown) C2 (2 cavities)

In the lower IP harness to the MFAM

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

Audible Warnings Connector End Views in Instrument Panel, Gauges, and Console

Relay Center 1

In the right top of the IP, under the access panel

Instrument Panel, Gages, and Console Component Views in Instrument Panel, Gauges, and Console

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Splice Pack 5

Under the crash pad, in the lower IP harness, joint connector 2, row 2, terminals A, B, C, D, E, F, G, H, J, K, and L

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Splice Pack 4

In the lower IP harness, joint connector 1, row 3, terminals A, B, C, D, E, F, G, H, J, K, and L

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Wheel Speed Sensor (WSS), Left Front (ABS-Hydraulic)

Mounted in the left front brake backing plate

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Wheel Speed Sensor (WSS), Left Rear (ABS-Hydraulic)

Mounted in the left rear brake backing plate

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Wheel Speed Sensor (WSS), Right Front (ABS-Hydraulic)

Mounted in the right front brake backing plate

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Wheel Speed Sensor (WSS), Right Rear (ABS-Hydraulic)

Mounted in the right rear brake backing plate

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

C200 (56 cavities)

In the lower IP harness, to the front chassis harness, in the left center of the cab, in the cab interface connector housing

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C202 (56 cavities)

In the lower IP harness, to the front chassis harness, in the left center of the cab, in the cab interface connector housing

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C212 (84 cavities)

In the lower IP harness, to the upper IP harness, in the left center of the IP at the floor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C413 (4 cavities)

In the front chassis harness, to the transmission harness, on inboard side of the left frame rail, to the left of the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

D206

In the lower IP harness, plugged into the diode connector breakout

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G105

On the left front of the #1 crossmember

Power and Grounding Component Views in Wiring Systems

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G107

From the front chassis harness, on the left frame rail, approximately 25 cm (9.8 in) to the rear of the front shock absorber

Power and Grounding Component Views in Wiring Systems

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P100

On the front chassis harness, under the hood, in the center of the bulkhead, in the cab interface connector housing

Harness Routing Views in Wiring Systems

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S103

In the front chassis harness, approximately 7 cm (2.8 in) to the rear of the main harness breakout

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S110

In the front chassis harness, approximately 7 cm (2.8 in) from the brake harness breakout toward the front turn signal harness

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S183

In the front chassis harness, approximately 3 cm (1.2 in) forward of the engine oil pressure switch breakout

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S217

In the lower IP harness, in the main branch, to the right of relay center 1

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S218

In the upper IP harness

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S227

In the upper IP harness, under the IP, approximately 6 cm (2.4 in) to the left of the fuse block breakout

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S243

In the upper IP harness, approximately 13 cm (5.1 in) from the IP connector toward the main harness

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S260

In the upper IP harness, in the main harness at the speedometer breakout

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S269

In the upper IP harness, in the main harness, approximately 21 cm (8.3 in) from the upper IP connector C212 (84 cavities)

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S279

In the lower IP harness, below the IP, approximately 5 cm (2.0 in) to the right of the relay center 1 harness breakout

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S280

In the lower IP harness, in the main harness, at the frame harness breakout

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S286

In the lower IP harness, in the main harness, at the fuse block harness breakout

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S287

In the lower IP harness, in the main harness, approximately 22 cm (8.7 in) to the right of the fuse block harness breakout

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S295

In the lower IP harness, in the main branch, at the C200 (56 cavities) and C202 (56 cavities) breakout

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S324

In the lower IP harness

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S325

In the lower IP harness

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S326

In the lower IP harness

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S327

In the lower IP harness

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S328

In the lower IP harness

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S330

In the lower IP harness

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S346

In the lower IP harness

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S347

In the lower IP harness

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S348

In the lower IP harness

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S386

In the lower IP harness

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