Question about 1993 GMC Sierra
Rear heater blower continues to run even when the ignition is off.
Could this be a problem in the controls or in the wiring?
the expansion valve is in the rear ac housing and it is bolted directly to the rear evaporator. it is an actual expansion valve and not an orifice tube. the part is about $45. the interior on the passenger side has to come out along with the entire rear ac sytem.
Posted on Jul 19, 2009
the problem is in the rear expansion valve. this valve is located at the rear evaporator core. i am assuming the freon level has been checked and is ok. this is a common problem with these vehicles. hope this helps!!
Posted on Sep 04, 2009
start by check all fuses, then check for power at rear blower.if fuses are good and you have power then may have bad blower,if no power and fuses are good then may have bad resistor. hope this helps good luck.
Posted on Oct 20, 2009
Testimonial: "Thanks for your advise."
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