upon starting my 2001 gmc sonoma, this winter. After a short warmup i turned on the heater and nothing. No air blowing at all hot or cold. what should be the first thing i should check?

Asked by Dec 02, 2014 at 05:07 AM about the 2001 GMC Sonoma SLS Extended Cab Short Bed 4WD

Question type: Maintenance & Repair

TRUCK DOESN'T PROVIDE HEAT WHEN WHEN KNOB IS TURNED ON.  NO SOUND AT
ALL.

1 Answer

8,630

Heater blower inop. Check fuses. Then jumper the wires if necessary to run the blower with a 12V power source you provide. Then check power in vehicle harness is provided to the blower. And ground is provided on the other wire. Many vehicles also achieve blower speeds that are less than high or max by using a resistor block that has preset resistors for each speed. the resistors are mounted in the airstream of the heater case to let the passing air inside the case keep them cool. The resistor block may have a thermal limiter. When it breaks from overheat, you must replace the blower and the resistor block after testing and restoring connections and the problem repeats after testing. The switch connection may be checked if no problem found yet, and the function control should also be inspected. If access and testing must vary from this, the service manual must be consulted because many systems are possible and in use.

Your Answer

GMC Sonoma Experts

  • #1
    parkle
    Reputation
    700
  • #2
    Mike Bonnell
    Reputation
    480
  • #3
    James Mayfield
    Reputation
    320
View All

Related Models For Sale

Used Chevrolet S-10
15 Great Deals out of 1,258 listings starting at $1,995
Used Ford Ranger
166 Great Deals out of 5,430 listings starting at $800
Used Toyota Tacoma
574 Great Deals out of 43,801 listings starting at $2,200
Used Ford F-150
2,546 Great Deals out of 193,098 listings starting at $799
Used Dodge Dakota
106 Great Deals out of 3,693 listings starting at $1,700
Used Chevrolet Silverado 1500
2,264 Great Deals out of 168,160 listings starting at $1,000
Used GMC Sierra 1500
982 Great Deals out of 66,609 listings starting at $2,495
Used Nissan Frontier
368 Great Deals out of 22,657 listings starting at $2,700
Used Dodge Ram 1500
380 Great Deals out of 10,772 listings starting at $1,500
Used Toyota Tundra
478 Great Deals out of 33,022 listings starting at $2,900
Used Chevrolet Blazer
5 Great Deals out of 1,079 listings starting at $950
Used GMC Jimmy
318 listings starting at $2,500
Used GMC Yukon
437 Great Deals out of 22,359 listings starting at $1,995

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.