2005 GMC crew CAB 4 x 4 heater

Tiny
TIM TRAYLOR
  • MEMBER
  • 2005 GMC SIERRA
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 101 MILES
The heater will stop and start blowing warm air randomly. If you excellerate heavy it will start to blow warm air again and then randomly go off and blow cold air. The fan continues to run on what ever level you have it set on.

thanks for your help
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Thursday, January 27th, 2011 AT 4:48 PM

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Tiny
HMAC300
  • EXPERT
Check to see if your actuators are getting power or not. You may have a control head going bad. Also cleant eh battery cable ends as it may be making poor contact until you get more revs going to put a better charge int ehbattery. You might also check your battery, most auto parts stores can do this for free. I've included a generic pic of actuators.
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Thursday, January 27th, 2011 AT 8:31 PM

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