GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Brake Pressure Warning Switch

On the rear of the EBCM casting, near the brake master cylinder, at the LF wheelhousing

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Data Link Connector (DLC)

Under the LH of the IP, at the LH of the steering column, mounted to the bottom of the 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 LH of the IP, taped on the IP harness

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

Electronic Brake Control Module (EBCM) C1

Front left side of the EBCM

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Electronic Brake Control Module (EBCM) C2

On the left side of the EBCM, between the VCM/PCM and the EBCM

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Electronic Brake Control Module (EBCM) C3

Front right side of the EBCM

Antilock Brake System Component Views

Antilock Brake System Connector End Views

Electronic Variable Orifice (EVO)/Passlock Control 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

At the RF of the front drive axle

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Instrument Cluster

Upper LH side of the IP, above the steering column

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

IP Fuse Block

LH of the IP, near the LF door jamb switch

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Powertrain Control Module (PCM)

Under the RH end of the IP, above the blower motor, behind the IP compartment

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 the LH of IP, near the convenience center

Transfer Case Control Component Views in Transfer Case

Transfer Case Control Connector End Views in Transfer Case

Underhood Fuse Block

At LR 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)

In the engine compartment, near the EBCM

Engine Controls Component Views (4.3L), Engine Controls Component Views (5.0L/5.7L), or Engine Controls Component Views (7.4L) in Engine Controls

VCM Connector End Views (4.3L), VCM Connector End Views (5.0L/5.7L), VCM Connector End Views (7.4L) in Engine Controls

Vehicle Speed Sensor (w/RWD)

At the LR of the transmission

Engine Controls Component Views (4.3L), Engine Controls Component Views (5.0L/5.7L), Engine Controls Component Views (6.5L) or Engine Controls Component Views (7.4L) in Engine Controls

Engine Controls Connector End Views (4.3L), Engine Controls Connector End Views (5.0L/5.7L), Engine Controls Connector End Views (6.5L), or Engine Controls Connector End Views (7.4L) in Engine Controls

Vehicle Speed Sensor (w/Selectable 4WD)

At the LR of the transfer case

Engine Controls Component Views (4.3L), Engine Controls Component Views (5.0L/5.7L), Engine Controls Component Views (6.5L) or Engine Controls Component Views (7.4L) in Engine Controls

Engine Controls Connector End Views (4.3L), Engine Controls Connector End Views (5.0L/5.7L), Engine Controls Connector End Views (6.5L), or Engine Controls Connector End Views (7.4L) in Engine Controls

Wheel Speed Sensor, LF

At the LF wheel

Engine Controls Component Views (4.3L), Engine Controls Component Views (5.0L/5.7L), Engine Controls Component Views (6.5L) or Engine Controls Component Views (7.4L) in Engine Controls

Engine Controls Connector End Views (4.3L), Engine Controls Connector End Views (5.0L/5.7L), Engine Controls Connector End Views (6.5L), or Engine Controls Connector End Views (7.4L) in Engine Controls

Wheel Speed Sensor, RF

At the RF wheel

Engine Controls Component Views (4.3L), Engine Controls Component Views (5.0L/5.7L), Engine Controls Component Views (6.5L) or Engine Controls Component Views (7.4L) in Engine Controls

Engine Controls Connector End Views (4.3L), Engine Controls Connector End Views (5.0L/5.7L), Engine Controls Connector End Views (6.5L), or Engine Controls Connector End Views (7.4L) in Engine Controls

C100

Engine Harness to the IP harness, LR of the engine compartment, at the Bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C120

Engine Harness to the front axle actuator, rear of the engine, near the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C123

Engine harness to 4WD front harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (Diesel)

Behind the RH of the IP, near the heater motor, in the foam wrap

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200 (Gas)

Behind the RH of the IP, near the heater motor, in the foam wrap

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C227

IP harness to stop lamp switch, 22 cm (8.5 in) from Steering Column harness breakout

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)

At the RF of the engine block

Power and Grounding Components in Wiring Systems

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G105 (Diesel)

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

Power and Grounding Components in Wiring Systems

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S107 (5.0L, 5.7L)

Engine harness, approx. 35 cm (13.5 in) from the Engine Temperature Switch harness breakout, toward the VCM harness breakout

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S107 (6.5L, HD)

Engine harness, approx. 30 cm (12 in) from the EBCM breakout, toward the tail lamp harness breakout

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S107 (7.4L)

Engine harness, approx. 18 cm (7 in) from the EBCM breakout, toward the taillamp 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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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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S147 (5.0L, 5.7L)

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

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S147 (6.5L)

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

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--

S147 (7.4L)

Engine harness, approx. 5 cm (2 in) from the fuel injector breakout, toward the A/C compressor clutch 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) from the EBCM breakout, towards EBCM

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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

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