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10-29-2025, 07:45 PM
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#1 |
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Registered User
Join Date: Jun 2009
Location: COOKEVILLE,TN
Posts: 154
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Heat problems.
'97 2500 454 Suburban. Heater works fine most of the time, as soon as it gets cold it just blows cold air the first time. The next time it may work fine.WTF
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10-30-2025, 06:17 PM
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#2 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 48,486
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Re: Heat problems.
2 things come to mind
1,Happened to me on my 02 chevy. It was a fail open thermostat, and intermittently at first, then total. Thermostat stays open and engine never really heats up. 2. The main door controller for the heater is not closing to keep out the cold air from the heater core. Both have happened to me. If your engine temp gauge is getting up to its normal heat or hot range, then I would check the heater door controller (I believe its down near floor on passenger side beneath glove box area). If you engine temp is staying cooler than normal, probably thermostat.
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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10-30-2025, 10:05 PM
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#3 |
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Registered User
Join Date: Jan 2000
Location: Wyoming USA
Posts: 2,506
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Re: Heat problems.
Have you flushed it out lately,what a-freeze you running dexcool or has it been changed to green ?
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2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327/4L60 |
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