heat and lights not working and smoke coming out of light switch

Asked by Alaskachick Aug 07, 2014 at 09:58 PM about the 1991 GMC Sierra 1500 K1500 4WD Standard Cab SB

Question type: Maintenance & Repair

Have a 4 wheel drive, 5.7motor unsure of it is a SB, LB,SLE or SLX, however I know it is a standard cab :)...Anyways the display for the heater started going out last week after the heat setting would freeze on whatever they were set too, then the problem seemed to resolve itself. Last night the display light went out except for the word "low" and the setting froze- I cannot get the heat to shut off. At the same time the lights stopped working. I was able to get the lights to barely work (very dimly) after toggling the switch off and on, then smoke started coming out of the light switch :( do I need to replace the circuit board? I am a single mother that just got back to work 2 weeks ago and cannot afford to pay to have this checked out...hopefully you have an answer for me PLEASE--

45,205

jamnblues answered 10 years ago

no money? that is the primary problem- and one I share with you- if something started burning, it means there is an electrical short somewhere around the switch- if you can handle it, look inside the dash and find the burned wire- the plastic coating should be melted, that is what was burning- it might be just a loose wire- if you don't see a burned wire then it is one of the switches that failed, either the climate control or the headlight switch- also look inside your fusebox and see if anything has gone awry- do you have a friend who is handy?

1 people found this helpful.

Mark helpful

Your Answer:

heat and lights not working and smoke coming out of light switch 1 Answer

Have a 4 wheel drive, 5.7motor unsure of it is a SB, LB,SLE or SLX, however I know it is a standard cab :)...Anyways the display for the heater started going out last week after the heat setting would...

1991 GMC Sierra 1500 K1500 4WD Standard Cab SB

-

Maintenance & Repair
2006 GMC Sierra Speakers and Dashboard lights not working 1 Answer

I recently started driving my dads old GMC Sierra and the speakers all go from working perfectly to being completely out or working at a very low volume. The dashboard lights are also out and only ...

2006 GMC Sierra 1500

-

Maintenance & Repair
front and back exterior turn signal not working, dash lights work 1 Answer

I had to replace the turn signal switch because the hazards weren't working. All lights on the dash now work as they should. I replaced the front side marker light, it was blown. Driver signals weren'...

2000 GMC Sierra 1500 SL 4WD Extended Cab LB

-

Maintenance & Repair
My break lights are not working when I push the peddle down and my left turn signal in the rear works when it wants to I checked all the fuses and changed the break light switch but no luck so far 3 Answers

Before I changed my break light switch I would here a click when I would barely press on the break and the break lights would work until I pushed them all the way down to stop now that I changed ...

1998 GMC Sierra 1500

-

Maintenance & Repair
Exhaust is not coming out of pipe as it should, loss of power, truck is quieter than usual and hisses when accelerating. help? 1 Answer

The day before this started , the truck was misfiring and there was a small exhaust leak coming from the manifold at idle. The rpm's surge while idling like it's not breathing as it should. When ...

1994 GMC Sierra 1500 K1500 SL 4WD Extended Cab SB

-

Maintenance & Repair

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. Content will be removed if CarGurus becomes aware that it violates our policies.