2000 Chevy Silverado Stuck Heater

2000 CHEVROLET SILVERADO
99,000 MILES • V8 • 4WD • AUTOMATIC
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MJT1997
  • MEMBER
  • 1 POST
I'm having a problem with the heater in my truck getting stuck on in the highest setting. If I turn the temp up to the highest setting and then try to back it down once the inside is warmed up it will continue to blow out hot air. The problem seems to reset itself between trips. I'm wondering if this is the switch, the heater core or something else?
Nov 1, 2008 at 12:26 AM
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JAMES W.
  • ✓Experienced Mechanic
  • 2,394 POSTS
Sounds like a vacuum porting in your temp selector switch. When you turn the truck off, the vacuum releases and then you start over again when you restart the truck.
Dec 18, 2008 at 4:11 PM
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