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

7,590

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

Add photo

Related Questions

Search GMC Sonoma Questions

GMC Sonoma Experts

#1 parkle
parkle
Reputation 650
#2 Mike Bonnell
Mike Bonnell
Reputation 420
#3 James Mayfield
James Mayfield
Reputation 310
View All

Related Models For Sale

Used Chevrolet S-10
14 Great Deals out of 1,662 listings starting at $1,995
Used Ford Ranger
209 Great Deals out of 6,719 listings starting at $1,450
Used GMC Sierra 1500
927 Great Deals out of 62,271 listings starting at $1,395
Used Chevrolet Silverado 1500
2,304 Great Deals out of 156,238 listings starting at $1,395
Used Toyota Tacoma
620 Great Deals out of 35,082 listings starting at $2,155
Used Ford F-150
2,880 Great Deals out of 212,656 listings starting at $1,000
Used Dodge Dakota
120 Great Deals out of 4,308 listings starting at $995
Used Nissan Frontier
444 Great Deals out of 23,950 listings starting at $1,900
Used Dodge Ram 1500
536 Great Deals out of 12,998 listings starting at $2,199
Used Jeep Wrangler
441 Great Deals out of 19,188 listings starting at $2,994
Used Chevrolet Blazer
1,349 listings starting at $1,995
Used Ford Explorer
1,006 Great Deals out of 73,800 listings starting at $750