process to recalibrate the actuators for the hvac system in a 2003 trail blaser

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ID Status Date Year Make Model Transmission Type A/C Controls Public/Private
#14556 Closed 2003 chevy trail blaser public

driver side vents blow warm air when air conditioning is on. some times driver side vents decrease air flow on some settings
Sparky

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

Alternate Method (w/o Scan Tool)

  1. Place the ignition switch to the OFF position.
  2. Remove the HVAC B fuse for a minimum of 10 seconds. Prefer one full minute.
  3. Install the HVAC B fuse.
  4. Start the vehicle.
  5. Wait 40 seconds for the HVAC control module to self-calibrate.
  6. Turn the ignition off for at least 10 seconds but no more than 30 seconds.
  7. Restart the engine and check HVAC operation.

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