GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

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

D206

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

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

On the rear of #1 crossmember

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

In the front chassis harness, mounted to the first crossmember

Antilock Brake System Component Views in Antilock Brake Systems

Antilock Brake System Connector End Views in Antilock Brake Systems

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

In the front chassis harness, mounted to the first crossmember

Antilock Brake System Component Views in Antilock Brake Systems

Antilock Brake System Connector End Views in Antilock Brake Systems

Generator

On the right side of the engine

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Generator Inline Fuse

Taped to the engine harness, at the rear of the generator

Engine Electrical Component Views in Engine Electrical

Engine Electrical Connector End Views in Engine Electrical

Ground Block (6 cavities)

On the right frame, inboard, part of the negative battery cable

Power and Grounding Component Views in Wiring Systems

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Hourmeter

Under the left side of the IP near the data link connector (DLC)

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

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

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

Instrument Panel Cluster (IPC) C3 (17 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) C4 (7 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) C5 (13 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

Power and Grounding Component Views in Wiring Systems

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Low Engine Coolant Level Indicator Switch

On the left side of the cab bridge, on the bottom of the radiator surge tank

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

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

MaxiFuse® Block 1

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

Power and Grounding Component Views in Wiring Systems

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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

Negative Battery Cable

From the outboard battery NEG terminal to the outside right frame rail with a feed to the ground block on the inside of the right frame rail

Power and Grounding Component Views in Wiring Systems

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Negative Battery to Battery Cable

From the outboard battery NEG terminal to the inboard battery NEG terminal

Power and Grounding Component Views in Wiring Systems

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Power Brake (P/B) Booster Fluid Flow Switch

On the right side of the P/B pump housing, to the left of the brake master cylinder

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Power Brake (P/B) Booster Pump Motor

On the left frame rail, behind the front crossmember, at the brake master cylinder

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Power Brake (P/B) Booster Pump Motor Relay

Under the MaxiFuse® block cover

Hydraulic Brake Component Views in Hydraulic Brakes

Hydraulic Brake Connector End Views in Hydraulic Brakes

Positive Battery Cable

From the positive battery cable POS terminal to the starter solenoid, at the starter motor

Power and Grounding Component Views in Wiring Systems

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Positive Battery Cable (Dual Batteries)

From the outboard battery POS terminal to the starter solenoid

Power and Grounding Component Views in Wiring Systems

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Positive Battery to Battery/Feed Cable

From the outboard battery POS terminal to the inboard battery POS terminal with a feed to the MaxiFuse® block

Power and Grounding Component Views in Wiring Systems

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Stoplamp Switch (Hydraulic Brakes)

On the brake pedal support

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Lighting Systems Connector End Views in Lighting Systems

C116 (8 cavities)

In the engine harness, to the front chassis harness, at the right front of the engine

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C206 (2 cavities)

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

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

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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

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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

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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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Splice Pack 1

Part of the lower IP harness, below the left side of the IP, to the right of the steering column, row 2

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Splice Pack 3

Part of the upper IP harness, under the crash pad, in the top of the IP, row 3

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Splice Pack 4

Part of the lower IP harness, below the left side of the IP, to the right of the steering column, row 3

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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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S107

In the front chassis harness, approximately 4 cm (1.6 in) to the ABS 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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S111

In the front chassis harness, approximately 4 cm (1.6 in) in the power brake booster motor breakout

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S117

In the front chassis harness, approximately 7 cm (2.8 in) toward P100 from the power brake booster pump motor breakout

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S182

In the front chassis harness, approximately 13 cm (5.1 in) to the rear of the engine oil pressure switch breakout

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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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S236

In the lower IP harness, in the IP extension breakout, approximately 20 cm (7.9 in) from the main branch

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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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S248

In the lower IP harness

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S249

In the lower IP harness

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S253

In the lower IP harness

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S254

In the lower IP 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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S293

In the lower IP harness, in the main branch, under the right seat, approximately 15 cm (5.9 in) from the park brake module breakout

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S325

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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