Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2004EXPRESS 1500 RWD V6-4.3L VIN XREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - ACCESSORIES AND OPTIONAL EQUIPMENTGLOBAL POSITIONING SYSTEM MODULESERVICE AND REPAIRBRACKET ASSEMBLY REPLACEMENT - ONSTAR MODULE
2004 Chevrolet Express 1500 RWD V6-4.3L VIN X
Bracket Assembly Replacement - Onstar Module
2004 Chevrolet Express 1500 RWD V6-4.3L VIN XSECTION Bracket Assembly Replacement - Onstar Module
BRACKET ASSEMBLY REPLACEMENT - ONSTAR MODULE
REMOVAL PROCEDURE
IMPORTANT: Do not exchange the vehicle communication interface module with other vehicles. Each vehicle communication interface module has a specific station identification (STID) and electronic serial number (ESN). These identification numbers are stored in the General Motors vehicle history files by VIN and used by OnStar(R) and the National Cellular Telephone Network.
1. Remove the drivers knee bolster.
2. Disconnect the coaxial cable and the electrical connectors (2) from the module.
3. Remove the bolts (3) retaining the module bracket to the instrument panel (I/P).
4. Remove the module and bracket (2) from the vehicle.
5. Release the tab (2) on the mounting bracket and pull that end of the module (3) away from the bracket.
6. Slide the module (3) out of the mounting bracket (1).
INSTALLATION PROCEDURE
1. Slide the module (3) into the mounting bracket (1).
2. Push the module (3) towards the mounting bracket (1) at the end near the tab (2).
Push until the module (3) is seated in the mounting bracket (1).
3. Install the module and bracket (2) to the I/P.
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the bolts (3).
Tighten
Tighten the bolts (3) to 3 N.m (27 lb in).
5. Connect the coaxial cable and the electrical connectors (2) to the module.
6. Install the drivers knee bolster.
REMOVAL PROCEDURE
IMPORTANT: Do not exchange the vehicle communication interface module with other vehicles. Each vehicle communication interface module has a specific station identification (STID) and electronic serial number (ESN). These identification numbers are stored in the General Motors vehicle history files by VIN and used by OnStar(R) and the National Cellular Telephone Network.
1. Remove the drivers knee bolster.
2. Disconnect the coaxial cable and the electrical connectors (2) from the module.
3. Remove the bolts (3) retaining the module bracket to the instrument panel (I/P).
4. Remove the module and bracket (2) from the vehicle.
5. Release the tab (2) on the mounting bracket and pull that end of the module (3) away from the bracket.
6. Slide the module (3) out of the mounting bracket (1).
INSTALLATION PROCEDURE
1. Slide the module (3) into the mounting bracket (1).
2. Push the module (3) towards the mounting bracket (1) at the end near the tab (2).
Push until the module (3) is seated in the mounting bracket (1).
3. Install the module and bracket (2) to the I/P.
NOTE: Refer to Fastener Notice in Service Precautions.
4. Install the bolts (3).
Tighten
Tighten the bolts (3) to 3 N.m (27 lb in).
5. Connect the coaxial cable and the electrical connectors (2) to the module.
6. Install the drivers knee bolster.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.