SOURCE: I have a 2007 H3 hummer, suddenly my fan does
It's the HVAC blower resistor in the air plenum under the glovebox. New resistor and wiring harness is about $70 at the Hummer Dealer.
SOURCE: the blower motor stops working sometimes
I had the same problem and sloved it with the help of google images, hummer blower motor resistor. Under the glove box the blower motor resistor can be found. It comes loose and the blower will work at times. When I reached under and pushed the connector in, it works fine. It was fixed within minutes. I am a gal with a Hummer and save myself a huge dealer bill. Good Luck!
SOURCE: check engine light came on after oil change
SOUNDS MORE LIKE SOMEONE KNOCKED OFF A WIRE CONNECTOR DOWN BY THE OIL FILTER AREA, RATHER THEN A RESET OF THE CHECK ENGINE LIGHT...SCAN OR HAVE THE SYSTEM SCANNED TO SEE WHAT CODE IS SET IN THE COMPUTER THIS MAY HELP YOU TO FIND THE CULPRIT IN 1/2 THE TIME, AFTER ITS DONE USE THE SCAN TOOL TO CLEAR THE CHECK ENGINE LIGHT, MAKE A NOTE OF WHAT CODE IT WAS AND DRIVE FOR A FEW DAYS TO BE SURE IT DOESN'T COME BACK AGAIN.
HAPPY MOTORING!!
SOURCE: how to change the fuel filter in 2007 hummer h3
This year and model does not have an inline fuel filter.
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