LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1483 (HVAC Systems - Manual) >> Diagnostic Information and Procedures >> Diagnostic System Check - HVAC Systems - Manual >> Test Description >> Notes

Test Description: 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.

The numbers below refer to the step numbers on the diagnostic table.

  1. 3. 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. 5. Determine if the HVAC Control Module, Body Control Module or Powertrain Control Module have set DTCs which may affect HVAC operation are present.
  3. 6. 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. 7. Answer Yes if the first 3 characters of the DTC name begins with B10; regardless of the last 2 characters.
scientia non olet · About LEMON Manuals