TrailBlazer 2WD L6-4.2L VIN S (2003)
Steps 23-29
The numbers below refer to the step numbers on the diagnostic table.
2. A partial malfunction in the class 2 serial data circuit uses a different procedure from a total malfunction of the class 2 serial data circuit. The
following modules communicate on the class 2 serial data circuit:
3. The following DTCs may be retrieved with a history status, but are not the cause of the present condition.