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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1592 (Sunroof System & Luggage Carrier) >> Diagnostic Information and Procedures >> Diagnostic System Check - Power Sunroof >> Test Description

Test Description

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.

The number(s) below refer to the step number(s) on the diagnostic table.

  1. 2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
  2. 4. Determining if any DTCs are set. If no DTCs are set then proceed to the Symptoms.
  3. 5. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
  4. 6. The presence of either of these DTCs will inhibit the operation of the sunroof.
Fig 1: Diagnostic System Check - Power Sunroof
G01641645Courtesy of GENERAL MOTORS CORP.
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