GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Brake/Transmission Shift Interlock (BTSI) Solenoid

On the left side of the IP, to the right of the steering column, under the support bracket

Standard Wheel/Column Component Views in Steering Wheel and Column

Standard Wheel/Column Connector End Views in Steering Wheel and Column

Headlamp and Panel Dimmer Switch

Lower Left side of the IP

Lighting Systems Component Views in Lighting Systems

Lighting Systems Connector End Views in Lighting Systems

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

Park/Neutral Position (PNP) Switch

At LH center of Transmission

Automatic Transmission Electronic Component Views in Automatic Transmssions- 4L60-E or Automatic Transmission Electronic Component Views in Automatic Transmissions- 4L80-E

Automatic Transmission Internal Connector End Views in Automatic Transmission- 4L60-E or Automatic Transmission Internal Connector End Views in Automatic Transmissions- 4L80-E

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 PCM Connector End Views

Stoplamp Switch

On the top of the brake pedal

Hydraulic Brake Component Views in Lighting Systems

Hydraulic Brake Connector End Views in Lighting Systems

Tranfer Case Encoder Motor

LH Center of Transfer Case

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Control Module (TCCM) (Selectable 4WD)

Under IP, near the convience center

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Select Switch

Center of IP, RH of steering column shift lever

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Vehicle Control Module (VCM) (Gas)

Engine Compartment, near EBCM

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

VCM Connector End Views (4.3L), VCM Connector End Views (5.0, 5.7L), or VCM Connector End Views (7.4L) in VCM Connector End Views

C100

Part of the engine harness to IP 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

Part of the engine harness to front axle actuator, in the rear of the engine, near the transmission

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C131

IP harness, Inline to Active Transfer Case Control harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C132

IP harness, Inline to Active Transfer Case Control harness

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C200

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 (Stoplamp Switch)

IP harness, Inline to the Stoplamp Switch

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C266

Part of the IP harness to steering column harness, to the left side of the steering column, near the bulkhead

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103 (Gas)

On the right front side of the engine, near the thermostat housing

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

G104 (5.0L/5.7L)

Backside of the right cylinder head

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

G104 (6.5L)

Top rear of the right cylinder head

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

G104 (7.4L)

Backside of the engine block, below the right cylinder head

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

G105 (Gas)

On the right front side of the engine block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

G105 (Diesel)

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

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

G200

Behind the left side of the IP, below the fuse block, on the tie bar

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

P100

In the left rear side of the engine compartment, at the bulkhead, above C100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

P101

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

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

S103 (5.0L, 5.7L)

Engine harness, approx. 8 cm (3 in) from EGR valve breakout, toward taillamp harness breakout

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--

S103 (6.5L)

Engine harness, approx. 12 cm (4.7 in) from starter solenoid breakout, towards the Underhood Lamp harness breakout

--

--

S103 (7.4L - A/T)

Engine harness, approx. 8 cm (3 in) from the EGR Valve harness breakout, towards the Ignition Coil harness breakout

--

--

S103 (7.4L - M/T)

Engine Harness, approx. 4 cm (1.5 in) from the Fuel Injector harness breakout, towards the Taillamp harness breakout

--

--

S147 (Gas)

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

--

--

S147 (Diesel)

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

--

--

S162 (5.0L, 5.7L )

Engine harness, approx. 17 cm (6.5 in) from starter solenoid breakout, toward LH oxygen sensor breakout

--

--

S162 (7.4L)

Engine harness, approx. 15 cm (6 in) from RH bank oxygen sensor breakout, toward starter solenoid breakout

--

--

S204

IP harness, approx. 10 cm (4 in) from C100, towards Data Link Connector (DLC)

--

--

S213

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

--

--

S215

IP harness, approx. 8 cm (3 in) from instrument cluster breakout, toward radio connectors breakout

--

--

S216 (Diesel and Uplevel)

IP harness, approx, 12 cm (4.5 in) from instrument cluster breakout, toward radio connectors breakout

--

--

S216 (Gas, all except uplevel

IP harness, approx. 16 cm (6 in) from instrument cluster breakout, toward radio connectors breakout

--

--

S217

IP harness, approx. 16 cm (6 in) from instrument cluster harness breakout, toward radio connectors breakout

--

--

S218

IP harness, approx. 16 cm (6 in) from inflatable restraint switch breakout

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--

S235

IP harness, approx. 4 cm (1.5 in) from steering column harness breakout, C100

--

--

S236

IP harness, approx. 10 cm (4 in) into steering column harness towards the Steering Column

--

--

S280

IP harness, approx. 5 cm (2 in) from DLC breakout

--

--

S302

Selectable 4WD harness, approx. 10 cm (4 in) from the Tranfer Case Relay breakout, toward the Front Axle Switch

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