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1winobud
Novice
Jan 14, 2015, 4:57 PM
Post #1 of 7
(1376 views)
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I have a 2000 Siverado, 5.3 ltr engine, 235,000 miles. My heater does not put out hot air, only luke warm on fan speed 2. If fan speed is increased, the air gets colder. Also when stopping for light or etc. the air gets cooler. Can anyone help me?
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 14, 2015, 5:04 PM
Post #2 of 7
(1361 views)
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How is your coolant level? If the level is good, are both heater hoses hot when the engine is at operating temperature?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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1winobud
Novice
Jan 14, 2015, 5:46 PM
Post #3 of 7
(1349 views)
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I will check and let you know as soon as I can. Thanks BUD
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1winobud
Novice
Jan 14, 2015, 5:58 PM
Post #4 of 7
(1346 views)
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Coolant level is good , one hose is hot the other hose is cold. The hot hose is the one one the front of the engine.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 14, 2015, 6:19 PM
Post #5 of 7
(1337 views)
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You could have a partially clogged heater core. Try reverse flushing the heater core out with a garden hose. If your coolant is old, it might be a good idea to drain and flush the entire system out.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jan 14, 2015, 6:20 PM)
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1winobud
Novice
Jan 14, 2015, 6:29 PM
Post #6 of 7
(1331 views)
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THANKS FOR YOUR HELP. WILL KEEP YOU POSTED WITH RESULTS. BUD 
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 14, 2015, 6:39 PM
Post #7 of 7
(1326 views)
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Sounds like some stale Dexcool sludge.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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