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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 843 (HVAC Systems - Automatic) >> Diagnostic Information and Procedures >> Re-Calibrating Actuators >> Preferred Method (w/ Scan Tool)

Preferred Method (w/ Scan Tool)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clear all DTCs
  2. Place the ignition switch in the OFF position.
  3. Install the motor assembly.
  4. Re-connect all previously disconnected components.
  5. Start the vehicle.
  6. With the scan tool, initiate the Motor Re-calibration feature of the HVAC module Special Functions menu.
  7. Verify that no DTCs have set as current DTCs.

Important:  Do not adjust any controls on the HVAC control module while the HVAC control module is calibrating. If interrupted improper HVAC performance will result.

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