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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1604 (HVAC Systems - Automatic) >> Diagnostic Information and Procedures >> Re-Calibrating Actuators >> Alternate Method (w/o Scan Tool)

Alternate Method (w/o Scan Tool)

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. 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. Disconnect the scan tool.
  4. Install the motor assembly.
  5. Re-connect all previously disconnected components.
  6. Remove the HVAC/ECAS fuse for a minimum of 10 seconds.
  7. Re-install the HVAC/ECAS fuse.
  8. Start the vehicle.
  9. Wait 40 seconds for the HVAC control module to re-calibrate.
  10. Verify that no DTCs have set as current DTCs.
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