2001 GMC Jimmy

2001 GMC JIMMY
137,300 MILES • 6 CYL • 4WD • AUTOMATIC
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GMCKEV
  • MEMBER
  • 1 POST
when the car is at an idle the thermostat runs up and the heater blows cold air when i am driving and the engine is running at 1500 rpm or over the heater workd fine and the thermostat operates at around 190 degrees and properly
Mar 5, 2010 at 9:40 AM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Hi, as far as the heater, less flow through the heater core at idle. It's a heat exchanger, more flow, more heat exchanged. In my opinion.
Mar 5, 2010 at 9:59 AM
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