GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Automatic Transfer Case (ATC) Control Module

To the left of the instrument cluster behind the headlamp switch

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Automatic Transfer Case (ATC) Select Switch

To the left of the instrument cluster above the headlamp switch on the IP

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Data Link Connector (DLC)

On the left lower dash below the steering column

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

Electronic Brake Control Module (EBCM)

On the left side of the inner frame

Antilock Brake System Component Views in Antilock Brake System

Antilock Brake System Connector End Views in Antilock Brake System

Encoder Motor

Inside of the transfer case

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Front Axle Actuator/Switch

On the axle housing on the right side of the center

Transfer Case Control Component Views

Transfer Case Control Connector End Views

Front Propshaft Speed Sensor

On the left side of the transfer case at the propshaft output

Transfer Case Control Component Views

Engine Controls Connector End Views in Engine Controls - 4.8L, 5.3L, 6.0L

Instrument Cluster

On the left 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

Left Bussed Electrical Center (LBEC)

On the lower left side of the IP

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Mid Bussed Electrical Center (MBEC)

Under the left side of the instrument panel near the left kick panel

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

Powertrain Control Module (PCM)

Near the left front inside the engine compartment

Engine Controls Component Views in Engine Controls - 4.8L, 5.3L, 6.0L

Engine Controls Connector End Views in Engine Controls - 4.8L, 5.3L, 6.0L

Underhood Bussed Electrical Center (UBEC)

At the left side of the engine compartment near the battery

Power and Grounding Component Views in Wiring Systems

Power and Grounding Connector End Views in Wiring Systems

C100

Under the UBEC

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C150

On the left inner fender inside the engine compartment

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Inline Harness Connector End Views in Wiring Systems

C151

On the left inner fender near the UBEC

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Inline Harness Connector End Views in Wiring Systems

C152

On the left inner fender under the UBEC

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C153

On the left inner fender near the UBEC

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Inline Harness Connector End Views in Wiring Systems

C154

On the left inner fender near the UBEC

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Inline Harness Connector End Views in Wiring Systems

G110

On the left front body mount

Power and Grounding Component Views in Wiring Systems

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G203

On the left upper IP at the A pillar

Power and Grounding Component Views in Wiring Systems

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P100

At the left rear of the engine compartment in the front of the dash

Power and Grounding Component Views in Wiring Systems

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Splice Pack 203 (SP203)

On the top left side of the IP near the A pillar

Harness Routing Views in Wiring Systems

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Splice Pack 205 (SP205)

On the left side of the IP behind the headlamp switch

Data Link Communications Component Views in Wiring Systems

Data Link Communications Connector End Views in Wiring Systems

S199

In the engine harness

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