I have a 2003 Siera pick up truck ans the heater is blowing out cool air and it only comes out the top not the vents what is my problem, I flush the radiator and put fresh anti-freeze and water in it

Asked by Dec 29, 2015 at 08:33 AM

Question type: Maintenance & Repair

2003 GMC Sierra pick-up truck 2500 v8 4×4 heayer
just blows out cool air

3 Answers

I tried flushing the radiator out and puting fresh anti-freeze and water in it

I put a heater control swicth in it and replaced the recister in it

76,335

Either needs a thermostat, or the cooling system needs to be purged from air pockets, and or the blend door actuator is not working to allow the blend door to close to the outside air.

Your Answer

Shortcuts

Maintenance & Repair Experts

  • #1
    Tom Demyan
    Reputation
    186,330
  • #2
    dandyoun
    Reputation
    97,300
  • #3
    tennisshoes
    Reputation
    82,520
View All

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.