2006 GMC 3500 Sierra LT. Heater Blower would not turn off. on 2006 GMC Sierra 3500

Even with ignition off and Key out the blower motor runs. Went to local dealership they say it is not uncommon and I need a new Blower resister module. So I get one and replace it. Still have speratic functions and now nothing. Control panel works fine all fuzes good. no blower. no heat. what am I missing?

by in Sheridan, WY on January 18, 2012
2 answers 3 comments
ANSWER by on January 18, 2012
I THOUGHT GM WAS DOING A CUST ASSISTANCE ON THAT ISSUE. WERE DID YOU GET YOUR RESISTOR AND IS IT CORRECT.
COMMENT by on January 18, 2012
from the Chevy Dealership. They double checked the part# and my vin is not part of the recall!
ANSWER by on January 18, 2012
Check for proper voltage to the blower resistor to find out if the problem is before the resistor. If you have the proper 12 volts to resistor then check the voltage at the blower motor. This will very due to the seed selected on HVAC control. You should have 12 volts to the blower on high speed. If everything checks out to blower motor connector then you have a faulty blower motor. You may have gotten a faulty resistor but being that it is a dealer part thats doubtful.
COMMENT by on January 18, 2012
When I first replaced the Resister the blower was working everything seemed ok. But the next morning when I started my truck... No nothing came on. I will check the voltages. I checked voltages... turned the control to 75 and med speed for blower. pulled the wire plug from the resister and 0volts.
COMMENT by on January 18, 2012
The tempature setting dosnt matter. When your checking voltage you should be checking it at the blower motor on each speed. It sounds like you have no voltage at blower motor from what your saying. If this is true check for voltage going into resistor. You may have been given a bad resistor.