Question about 1997 Chevrolet Suburban

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97 chevy Suburban blows hot air

At times when the vent is blowing air and the the engine rpms go
higher (above 1500rpms)I get hot air blowing out at the front vents. This happens when
the A/C is on and also when its off. So is there some damper door
not closing at the heater core?
This has the 5.7l

Thanks

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  • Chevrolet Master
  • 3,433 Answers

Sounds like you have it. Danper doors malfuction. This is due to a vauum hosr disconnected or leakin. Listen for leakge everything turned off. chk under hood for disconnwcted or broken hose. Good luck

Posted on May 26, 2009

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Posted on Jan 02, 2017

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