gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Initial Inspection and Diagnostic Overview|Page 9419 > < Initial Inspection and Diagnostic Overview|Page 9417
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The specified procedure will determine the particular condition.

5. This step is checking for DTCs in the BCM.
6. The presence of DTCs which begin with "U" indicate that the other module is not communicating. The specified procedure will compile all the

available information before tests are performed.

Initial Inspection and Diagnostic Overview|Page 9419 > < Initial Inspection and Diagnostic Overview|Page 9417