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Home >> Hummer >> 2008 >> H3 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 457 (Lighting System) >> Diagnostic Information and Procedures >> Symptoms - Lighting >> Notes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Symptoms - Lighting: Notes

WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The following steps must be completed before using a symptom table.
  1. Perform the Diagnostic System Check - Vehicle before using a symptom table in order to verify that all of the following conditions are true:
    • There are no DTCs set.
    • The control modules can communicate via the serial data link.
  2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following:
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