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01-14-2014, 10:09 PM
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#1 |
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Registered User
Join Date: Jan 2012
Location: Tyler Texas
Posts: 223
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1999 C1500 Suburban Front Heater
New Thermostat
New actuators - fresh air, blend door, you name it Heater hoses in engine bay both hot NEW AC/heater controller installed today (Brand new AC Delco) Followed instruction to a T. Disconnected negative battery etc. New radiator (a month ago) STILL NO HEAT IN FRONT!!!  Driving me insane. R Vin Number - old body style 99 LS version 5.7 350 HELP Possibly the heater control valve solenoid behind the dryer? Last edited by shultzee13; 01-14-2014 at 10:37 PM. |
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01-19-2014, 01:08 AM
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#2 |
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Registered User
Join Date: Jan 2014
Location: Henderson NC
Posts: 2
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Re: 1999 C1500 Suburban Front Heater
I had that problem that ended up being the heatercore,thermostat,and radiator cap
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01-19-2014, 11:34 PM
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#3 |
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Registered User
Join Date: Dec 2013
Location: Humble, Texas
Posts: 185
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Re: 1999 C1500 Suburban Front Heater
This model doesn't a heater control valve. Sounds like the core might be restricted/stopped up. Have you tried back flushing the heater core? If not, remove both heater hoses at the firewall and use a garden hose to flush the core both directions. See if you get any flow or trash out of it.
__________________
I know the "VOICES" aren't real but they have some great ideas. 1978 GMC Sierra Classic C25 1983 Datsun 280ZX Turbo 1997 Chevy Cheyenne K2500 1999 Polaris Sport 400 |
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01-20-2014, 12:26 AM
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#4 |
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Registered User
Join Date: Jan 2014
Location: Henderson NC
Posts: 2
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Re: 1999 C1500 Suburban Front Heater
I backflushed a couple of times before finally changing it all out....
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