Question about 2006 GMC Savana Cargo
Very little heat still after changing water pump,thermostat, and heater core
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Posted on Jan 02, 2017
two things--first replace your cabin air filter.second reverse flush your heater core with a garden hose and that should remove the build up of material in your heater core and restore the flow,hope this helps
Posted on Oct 21, 2009
Testimonial: "Hello; I backflushed heater core, cooling system flush. Heater floor vent temp. went from 96 degrees to 140; Thanks for your excellent advice. Robert"
It is in the gas tank ,not hard depending on your experience ..But safety is a big concern . Don't use a incandescent light , or allow any one around smoking . Also have a fire extinguisher handy , and some help . Be careful not to cause any Sparks . if this helped please let us know .if i can be of any further assistance please ask, Thank You.
Posted on Mar 30, 2010
SOURCE: flushing the heater core
I removed the hoses and took a air nozzle at low pressure and blew in the return hose connection of the core. A big chunk of paste like substance shot out then pure liquid. I put the hoses back on and tested it. Now its blowing hot!!!!!!!
Posted on Dec 14, 2010
Tips for a great answer:
Jan 04, 2015 | 1997 GMC Jimmy
Temperature Control Blend Door Failure No Heat or no AC (dependes on
where door sticks)
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.
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