2002 GMC Sierra blower blows cold air

2002 GMC SIERRA
70,000 MILES • V8 • 2WD • AUTOMATIC
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NATE10
  • MEMBER
  • 1 POST
Do I change the thermostat?
Jan 28, 2010 at 1:24 AM
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TOOOMANYTOYS
  • ✓Experienced Mechanic
  • 513 POSTS
When vehicle has been run for awhile what does the temp gauge say around 210? If cooling system is not overcooling. It may have a clogged heater core, or a sticking temperature actuator
Jan 28, 2010 at 1:33 AM
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