gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

Blower Motor|Service and Repair > < Initial Inspection and Diagnostic Overview|Page 3010
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Blower Noise

BLOWER NOISE

A constant air rush noise is typical of all heater systems when operating on "HIGH" blower. Some systems and modes may be louder than others. If
possible, check a similar vehicle to determine whether the noise Is typical or excessive. For diagnosis of excessive blower noise, refer to accompanying
figures.

Blower Motor|Service and Repair > < Initial Inspection and Diagnostic Overview|Page 3010