GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Brake Pressure Warning Switch

On rear of EBCM casting, near Brake Master Cylinder, at LF Wheelhousing

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Data Link Connector (DLC)

Under LH of IP, LH of Steering Column, mounted to bottom of Knee Bolster

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Daytime Running Lamps (DRL) Module

Under the left side of the IP, taped to the IP harness

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Electronic Brake Control Module (EBCM)

Near Brake Master Cylinder, at LF Wheelhousing

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Electronic Variable Orifice (EVO)/Passlock Module

Under the center of the IP

Theft Deterrent System Component Views in Theft Deterrent

Theft Deterrent System Connector End Views in Theft Deterrent

Front Axle Actuator

RF of Front Drive Axle

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Instrument Cluster

On the upper left end of the IP, above the steering column

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

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

IP Fuse Block

To the left of the IP, near the left front door jamb switch

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Powertrain Control Module (PCM) (Diesel)

Under RH end of IP, above Blower Motor, behind IP Compartment Box

Engine Controls Component Views in Engine Controls

Powertrain Control Module Connector End Views in Engine Controls

Stoplamp Switch

At the top of the brake pedal

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Transfer Case Shift Control Module (Auto 4WD)

Under LH of IP, near Convenience Center

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Underhood Fuse Block

In the left rear side of the engine compartment, on the fender

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (Gas)

Engine Compartment, near EBCM

Engine Controls Component Views in Engine Controls

VCM Connector End Views (5.0L/5.7L) VCM Connector End Views (7.4L)

Vehicle Speed Sensor (w/RWD)

At the LR of the transmission

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Vehicle Speed Sensor (w/Selectable 4WD)

At the LR of the transfer case

Engine Controls Component Views in Engine Controls

Engine Controls Connector End Views in Engine Controls

Wheel Speed Sensor, LF

Left front wheel

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Wheel Speed Sensor, RF

Right front wheel

Antilock Brake System Component Views

Antilock Brake System Connector End Views

C100

IP harness inline to the Engine harness, in the left rear side of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C120

Engine harness, inline to the 4WD Transfer Case Harness, in the rear of the engine, near the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

IP harness inline to the Engine harness, behind the right side of the IP, near the heater motor, in foam wrap

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C227

IP harness inline to the Stoplamp Switch harness, located at the steering column support bracket

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

DIODE 1

In the underhood fuse-relay center, LR of the engine compartment, on the fender

Harness Routing Views in Wiring Systems

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G105 (Gas)

On the right front side of the engine block

Power and Grounding Component Views in Wiring Systems

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G105 (Diesel)

Right Rear of the cylinder head, cylinder #7 intake bolt

Power and Grounding Component Views in Wiring Systems

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P101

In the right rear side of the engine compartment, at the bulkhead

Harness Routing Views in Wiring Systems

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S107 (5.0L, 5.7L)

Engine harness, approx. 20 cm (8 in) from EGR valve breakout, toward taillamp harness breakout

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S107 (6.5L, HD)

Engine harness, approx. 40 cm (15 in) from EBCM breakout, toward Transmission harness breakout

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S107 (7.4L)

Engine harness, approx. 18 cm (7 in) from EBCM breakout, toward tthe EGR harness breakout

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S111 (5.0L, 5.7L)

Engine harness, approx. 10 cm (4 in) from the EBCM breakout, after the taillamp harness breakout

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S111 (6.5L

Engine harness, approx. 11 cm (4.5 in) from the EBCM breakout toward the Engine Jumper harness breakout

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S111 (7.4L)

Engine harness, approx. 7 cm (2.5 in) from the EBCM breakouts, toward the PCM harness

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S147 (Gas)

Engine harness, approx. 5 cm (2 in) from EGR valve breakout, toward taillamp harness breakout

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S147 (Diesel)

Engine harness, approx. 4 cm (1.5 in) from starter motor solenoid breakout

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S150

Engine harness, approx. 13 cm (5 in) from the EBCM harness breakout, towards EBCM

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S151

Engine Harness, approx. 7 cm (2.5 in) inside EBCM harness breakout

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S152 (5.0L, 5.7L, 7.4L)

Engine harness, approx. 7 cm (2.5 in) from the EBCM breakout, toward VCM connector breakout

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S152 (6.5L)

Engine harness, approx. 4 cm (1.5 in) from the IP harness breakout, toward the P101

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S157 (6.5L)

Engine harness, approx. 50 cm (19.5 in) before EBCM harness breakout

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S157 (7.4L)

Engine harness, approx. 40 cm (16 in) before EBCM harness breakout

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S213

IP harness, approx. 4 cm (1.5 in) from steering column harness breakout, towards the DLC

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S222

In the IP harness, approx. 20 cm (8 in) from the radio harness breakout, toward C200

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S280

In the IP harness, approx. 5 cm (2 in) from the DLC breakout, towards DLC connector

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S314 (K300)

At the selectable 4WD harness, approx. 5 cm (2 in) from the transfer case relay breakout, toward the front axle switch

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