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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 183 (Heating, Ventilation, And Air Conditioning) >> Diagnostic Information and Procedures >> Symptoms - Heating, Ventilation, and Air Conditioning >> Notes

Symptoms - Heating, Ventilation, and Air Conditioning: Notes

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

The following steps must be completed before using the symptom tables.

  1. Perform the Diagnostic Starting Point - Vehicle before using the symptom tables in order to verify that all of the following are true:
    • There are no DTCs set
    • The control modules can communicate via the serial data link
  2. Review the system operation in order to familiarize yourself with the system functions. Refer to Symptoms - HVAC Systems - Automatic .
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