Question about 2001 GMC Jimmy

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Why does the heater in my 2001 GMC Jimmy blow hot then cold

My 2001 GMC Jimmy blows hot air then cold. I have to keep adding antifreeze, but I can not see where I am loosing it. The passenger side floor is not wet, and there has been no antifreeze on the ground under my car.

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Posted on Jan 02, 2017

  • 958 Answers

SOURCE: 2005 GMC air conditioning

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Posted on Sep 23, 2008

mrgreenz
  • 962 Answers

SOURCE: 01 gmc truck 1500 2wd oder of antifreeze inside cab

the small radiator just inside the cab, where the hoses go to the heater is leaking. You may try using stop leak (many don't recommend this) or take off the heater radiator. it will probably get worse when you turn on the heater and fog up the windshield if not fixed. hope this helps.

Posted on Nov 07, 2008

SOURCE: 2001 gmc jimmy engine warm but heater blows cold air

Disconnect the heater hoses from the water pump and the intake manifold. Get a compressor and blow out the hose (put the air hose into the the hose that came off the mainfold. then flush the system and replace the antifreeze.

Posted on Dec 12, 2008

picatudo
  • 239 Answers

SOURCE: 2001 gmc jimmy defroster-heater blower will not direct heat

you have a vacuum leak

Posted on Jan 07, 2009

  • 599 Answers

SOURCE: Antifreeze leaking from freeze plug

sorry not an easy fix, you must replace the freze out plug by taking out the old one and replace with a new one. needs to be done on a lift not a backyard job

Posted on Apr 08, 2009

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