I have a 2005 GMC Sierra. Afew years ago I started having trouble with the A/C fan. Found overheating at connections on control module. Jumped some wires and have every speed except highest. Was satisfied with that. Later was informed of recall for control module but never got around to taking it in. Recently, blower stopped working. At same time, cruise stopped working and "ABS" and "Brake" warning lights came on. Checked blower fuse and it was blown. Replaced with no effect. Took to dealer to have control module replaced. No effect. Have checked all fuses. Still no blower fan, no cruise, and "ABS" and "Brake" lights still on. Dealer has no clue. What now?
Diagnosis and replacement of a faulty blower resistor assembly along with updating the seven wire harness connector. this repair applies to 1999, 1500 series Silverado and Sierra. 2000-2007 Chevrolet Avalanche , Classic Silverado, Suburban and Tahoe. 2000-2007 GMC Sierra classic and Yukon. it is also very similar to 2002-2009 Envoy and Trailblazer. Take a look here on how to test this.
Check the relays and under hood fuse panels. Looks like your cheap attempt to get around computerized system and not making time to deal with the recall has come back to bite you in the butt.
If you don't have wiring diagrams,can't read them,&
or work on your own vehicles & their technology,then
a repair shop or different dealer, is you only option,that
question you knew the answer to
SOURCE: 1998 gmc sierra brake lights
did u check that they not burn?if not you should Check the wires going into the steering column if you don't have separate turn signal lights and brake lights because if they use the same bulb then the turn signal may be bad. If I remember correctly that particular car doesn't work this way, but I include it just in case.
SOURCE: 1990 GMC Sierra 1500 pickup. Windshield wipers, Cruise Control
May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.
SOURCE: 1998 GMC Sierra. Blower
could it be the blower motor it self? sometimes they have a "bad spot" when it is not working, can you hit it and make it run? pretty common on these trucks. the switch is also common. they often melt at the connector on the back making a bad connection. i would double check the motor first.
SOURCE: I have a 2006 GMC Sierra 1500 EXT cab. In early
I would get the fan motor itself checked out. #5 position is where the current goes straight to the motor, that being burnt out indicates a burnt motor to me, or the resistor is fried. But I think the resistor is either in the motor or the controller, so either way, do check the fan.
SOURCE: 2005 gmc sierra...took blower motor
their is a blower motor relay in the fuse box under the hood more than likely your problem!
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