Question about 2006 Chevrolet Suburban

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My 2005 Suburban only blows hot air when accelerating.

When I am idoling the heat goes cold. When I accelerate it warms up.

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  • Chevrolet Master
  • 660 Answers

Does it ever overheat? (waterpump or thermostat)

Possible clog in heater core or pinched heater hose under hood.

If coolant/water is at proper level, and you don't over heat, the later will most likely be the issue.

Heater core is small radiator deep inside under the front passenger dash and is rather hard to access.

If you smell something like coolant inside, this is for sure the issue.

Hope this helps.

Posted on Dec 10, 2012

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 37 Answers

SOURCE: Heat wont blow through heater or defroster vents

The door in the heater box is most likely stuck. It is located under the dash on the passenger side

Posted on Dec 06, 2008

  • 20 Answers

SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Posted on Feb 23, 2009

longbow243
  • 103 Answers

SOURCE: 2004 chevrolet suburban AC blows hot/cold at same time

You need to replace the drivers side temp actuator that is located on the left side of the HVAC box. It is retained by 3 screws and is fairly easy to replace.

Posted on Aug 29, 2009

inspectmycar
  • 233 Answers

SOURCE: ac blowing hot air

the blend door actuator located on the air box (right hand side under dash) is prob. inop. worst case senerio the blend door its self is broken. I have replaced the actuator more than anything.

Posted on Sep 16, 2009

  • 89 Answers

SOURCE: ac makes loud chatter on acceleration been throuhg

hi, there is a published technical service bulletin about this problem for these vehicles and the tahoes. the compressor sitting so low in the system, gets over-run by the liquid freon banging internally and actually locks up on and off during operation. this is the noise you are hearing. apparently there is a screen kit to install in the low side suction line to prevent this from happening, but GM also states the compressor needs to be replaced and the new compressors from GM at least, already have this modification done. So, i replace them when they come into my bay with the complaint you speak of, and the tensioner for the belt, likely the belt too. but it looks like you already know all about that. hope i could help.

Posted on Jun 07, 2010

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