GM Service Manual Online
For 1990-2009 cars only

Name

Location

Locator View

Connector End View

Cellular Antenna

In the passenger compartment behind the glove box on the upper left site of the VCU

Cellular Communication Component Views

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GPS Antenna

In the passenger compartment behind the glove box on the upper left side of the VIU

Cellular Communication Component Views

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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

Microphone

In the passenger compartment on the overhead console

Cellular Communication Component Views

Cellular Communication Connector End Views

OnStar Keypad C1

In the passenger compartment on the rear, left side of the overhead console

Cellular Communication Component Views

Cellular Communication Connector End Views

OnStar Keypad C2

In the passenger compartment on the rear, right side of the overhead console

Cellular Communication Component Views

Cellular Communication Connector End Views

Vehicle Communications Unit

In the passenger compartment behind the glove box mounted to the top of the VIU

Cellular Communication Component Views

Cellular Communication Connector End Views

Vehicle Interface Unit C1

In the passenger compartment behind the glove box on the left side of the VIU

Cellular Communication Component Views

Cellular Communication Connector End Views

Vehicle Interface Unit C2

In the passenger compartment behind the glove box on the left side of the VIU

Cellular Communication Component Views

Cellular Communication Connector End Views

C239

Behind right hand side of I/P, near heater motor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views I in Wiring Systems

C250

Behind right hand side of I/P, near heater motor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C251

Behind right hand side of I/P, near heater motor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views I in Wiring Systems

C252

Behind right hand side of I/P, near heater motor

Harness Routing Views in Wiring Systems

Inline Harness Connector End Views in Wiring Systems

C306

In the overhead console/to microphone and speaker

Harness Routing Views in Wiring Systems

Inline Harness 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 Connector End Views in Wiring Systems

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S213

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

Harness Routing Views in Wiring Systems

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S270

Onstar harness 7.5 cm (3 in) from the Radio Connector C3. Circuit 367

Harness Routing Views in Wiring Systems

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S274

Onstar harness 7.5 cm (3 in) from the Radio Connector C3. Circuit 372

Harness Routing Views in Wiring Systems

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S275

Onstar harness 7.5 cm (3 in) from the Radio Connector C3. Circuit 368

Harness Routing Views in Wiring Systems

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S284

Onstar harness 7.5 cm (3 in) from the VIU C2 connector. Circuit 150

Harness Routing Views in Wiring Systems

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S285

Onstar harness 7.5 cm (3 in) from the VIU C2 connector. Circuit 1140

Harness Routing Views in Wiring Systems

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S286

Onstar harness 7.5 cm (3 in) from the VIU C2 connector. Circuit 624

Harness Routing Views in Wiring Systems

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S289

Auxiliary Power harness

Harness Routing Views in Wiring Systems

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S292

IP harness, approx. 22 cm (8.5 in) before the radio harness breakout, from C304

Harness Routing Views in Wiring Systems

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