LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2002 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1580 (Cellular Communication System) >> Diagnostic Information and Procedures >> Symptoms - Cellular Communication >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Symptoms - Cellular Communication: Notes

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The following steps must be completed before using the symptom tables.
  1. Perform the DIAGNOSTIC SYSTEM CHECK - CELLULAR COMMUNICATION   before using the Symptom Tables in order to verify that all of the following are true:
    • There are no DTCs set.
    • The control module can communicate via the serial data link.
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to OnStar  DESCRIPTION AND OPERATION   . 
scientia non olet · About LEMON Manuals