GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Body Relay Block

LH of the dash, right of the IP fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Body Control Module (BCM) Connector C2, Blue (24 Cavities)

Lower rear of the IP, on the heater

Body Control System Component Views in Body Control System

Body Control System Connector End Views in Body Control System

Data Link Connector (DLC)

Lower LH of the IP

Data Link Communications Component Views in Data Link Communications

Data Link Communications Connector End Views in Data Link Communications

Four Wheel Drive Indicator Switch

At the front axle, RH of the differential

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Front Drive Axle Clutch Solenoid

On the cowl, 16.5 cm (6.50 in) from the breakout to the windshield wiper motor

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Instrument Cluster

In the IP, ahead of 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 door jamb switch, LF

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Transfer Case Encoder Motor C1 (4 Cavities)

RH of the ATC, below the rear transfer case speed sensor connector

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Encoder Motor C2 (6 Cavities)

Top of transfer case, left side

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Front Propshaft Speed Sensor

Top LH rear of the transfer case

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Rear Propshaft Speed Sensor

Top RH rear of the transfer case, near the rear propshaft

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Shift Control Module Connector C1 (32 Cavities)

Behind RH front kick panel, the lower connector

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Shift Control Module Connector C2 (4 Cavities)

Behind RH front kick panel, the upper connector

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Shift Control Switch Connector C1 (8 Cavities)

Right of the instrument panel cluster

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Transfer Case Shift Control Switch Connector C2 (4 Cavities)

Right of the instrument panel cluster

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Underhood Fuse Block

On the top of the left inner wheelwell

Power and Grounding Component Views in Wiring Systems

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Underhood Fuse Block Connector C1 (68 Cavities) (Body)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Underhood Fuse Block Connector C2 (68 Cavities) (Engine)

Below the underhood fuse block

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Vehicle Control Module (VCM) (4.3L Engine)

RH of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

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Vehicle Control Module (VCM) Connector C4 (24 Cavities)

RH of the engine compartment

Engine Controls Component Views in Engine Controls - 4.3L

Engine Controls Connector End Views in Engine Controls - 4.3L

C108 (16 Cavities)

Transfer case extension harness to body harness, LH rear engine compartment near cowl penetration P100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C114 (2 Cavities)

Body harness to transfer case shift control harness, LH rear engine compartment near cowl penetration P100

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C203 (116 Cavities)

Body harness to IP harness, to the RH of the IP

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

G103

(CKT 351) Engine harness, RH rear of the cylinder head

Harness Routing Views in Wiring Systems

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G105

(CKT 450, CKT 451) Engine harness, LH Rear of the cylinder head

Harness Routing Views in Wiring Systems

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G117

(CKT 850) Body harness, to the LH rear of the engine compartment, near the cruise control module

Harness Routing Views in Wiring Systems

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G203

(CKT 1050) Body harness, to the RH of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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G204

(CKT 1050) Body harness, to the RH of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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G205

(CKT 1050) Body harness, to the RH of the IP, between C203 and the splice packs

Harness Routing Views in Wiring Systems

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P100

IP bulkhead pass-through, LH rear of the engine compartment, on the cowl

Harness Routing Views in Wiring Systems

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S106

(CKT 351) Engine harness, between the breakouts to the rear heated oxygen sensors connector and the body harness connector, 7 cm (2.76 in) from the breakout to the heated oxygen sensor connector

Harness Routing Views in Wiring Systems

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S118

(CKT 850) Body harness, between the breakouts to the blower motor and the blower motor relay

Harness Routing Views in Wiring Systems

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S134

(CKT 850) Auto 4WD extension harness, in the breakout to the front VSS, 10 cm (3.94 in) into the breakout

Harness Routing Views in Wiring Systems

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S152

(CKT 351, CKT 413, CKT 451) Engine harness, between the breakouts for the LH rear and RH rear engine block grounds, 15 cm (5.9 in) from the breakout to the LH rear engine grounds

Harness Routing Views in Wiring Systems

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S205

(CKT 1220) IP harness, between the breakouts for the radio and BCM connector C3, 8 cm (3.15 in) from the breakout to the radio

Harness Routing Views in Wiring Systems

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S282 (4WD Base Pickup Only)

(CKT 1382) IP harness, between the breakouts to the BCM connector C3 and the stereo radio, 6 cm (2.36 in) from the breakout to the BCM

Harness Routing Views in Wiring Systems

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Splice Pack SP200

(CKT 41, CKT 241, CKT 341, CKT 817) Strapped to the body harness, in the center front of the IP, to the RH of SP204

Harness Routing Views in Wiring Systems

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Splice Pack SP201

Body harness, to the LH of the IP, below the IP fuse block, taped to the body harness

Harness Routing Views in Wiring Systems

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Splice Pack SP203

(CKT 1050) IP harness, on the IP, in front of the ashtray, strapped to the body harness

Harness Routing Views in Wiring Systems

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Splice Pack SP204

(CKT 584, CKT 1414, CKT 1415, CKT 1050) Strapped to the body harness, in the center front of the IP, to the LH of SP200

Harness Routing Views in Wiring Systems

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