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Little to no heat coming into CAB?

Tiny
LEATHERNECK5
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I have little to no heat coming into cab of truck. I replaced the thermostat still same problem. Any recommendations would be helpful. One thing I will say is when I have it on low Some heat does come out. But when I put control on high the heat is replaced by cold air.
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Thursday, December 13th, 2007 AT 12:14 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be a clogged-up heater hose or heater core-this 2 checks out, start checking the air mix and blend door could be a problem with an actuator or vacuum.
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Thursday, December 13th, 2007 AT 12:21 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
To me it sounds like the temperature blend door actuator needs to be replaced, here is a guide to help fix the problem and I have included how to change the part out in the images below.

https://www.2carpros.com/articles/car-heater-not-working

This video will show you how

https://youtu.be/Eqf-H3COtSo?si=HwvfvY79tzrBm3rT

Check out the images (below). Please let us know what happens.

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Tuesday, September 10th, 2024 AT 5:32 PM

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