Diagnostic Aids
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The customer concern may have been due to a lack of cellular service in a given area or a failure in the National Cellular Network infrastructure that has since been corrected.
OnStar Call Center Remote Function Requests Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: OnStar Schematics Connector End View Reference: Cellular Communication Connector End Views |
|||
| 1 | Did you perform the Cellular Communication Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Cellular Communication |
| 2 | Attempt to honk the horn, operate the lights and lock or unlock the doors on the vehicle. Does the applicable system operate properly? |
Go to Step 3 | Go to
|
| 3 |
IMPORTANT:
It is necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.
|
Go to Diagnostic Aids | Use the scan tool to access the STID and ESN and contact the General Motors Technical Assistance Center |