Question about GMC Cars & Trucks
Does it have manual or automatic climate control system ? Vin C or K 4X4 or 2WD ? Heat shuts off ???? You mean the heater blower motor stops blowing air out of the vents ?
Posted on Feb 19, 2019
SOURCE: GMC 2500 Sierra keeps stalling
If you get check engine light or a service
engine soon light then is something related to the computer.
Can cause stalling, Bad fuel, clogged fuel filter, bad spark plugs, bad spark plug wires, bad O2 sensor (would cause a check engine light) bad ignition coil, bad cam shaft sensor, bad crank shaft sensor.
Posted on Aug 01, 2008
i had the same problem. depends what kind of trim model you have. but if you look on the passenger side floor right under the glove box is where your heater unit is. if you take off the cover to it. their will be a little squarebox looking thing with 2 - 3 wires coming out of it and goin to the blower motor unit . Tap the square box with a screwdriver while your blower motor is on off mode. it should shut off if you give it a couple good solid taps. dont be afraid to hit it. that little square thing might have to be replaced if it turns off when you hit it. or just may have to be cleaned.
Posted on Jan 05, 2009
My 2003 Sierra's blower came on by itself in the garage while I was sleeping and ran the battery completely down. I had to replace the blower switch located under the glove box next to the blower at the bottom of the right corner of the dash. The switch is in front of the blower and held in by two screws. Disconnect the two wire connections. This is a "dealer only" part and cost me 65.00. Also check the wire harness with seven wires connected to it for melted plastic. It will be marked "ABCDEFG". If it has melted, you'll need to replace it. Pay attention when reinstalling either part, that the wires "ABCDEFG" match the switch in that order.
Posted on Jan 17, 2009
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