The blower motor on some 2007-08 Chevy Silverado and GMC Sierra extended cab and crew cab models built before April 1, 2008, may fail to operate.
If the fuse is good and the circuit up to the motor has power the motor is probably shorted, GM said. Water intrusion is the likely culprit.
Installing an upgraded blower motor with a revised moisture shield, Part No. 25973845, should prevent further trouble.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].
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