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


Asked by 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--

1 Answer


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?

Your Answer

Add photo

Related Questions

  • tail lights dont work 20 answers

    The brake lights, turn signals, reverse lights all work but the tail lights ( when you head lights are on ) do not work. i have changed the bulbs, fuses, checked the tail light circut board, checked...

    1991 GMC Sierra 1500 K1500 4WD Standard Cab Stepside SB


    Maintenance & Repair

  • Brake lights don't work 4 answers

    I was told it was the brake light switch, replaced that and no effect. All the tail lights work including the 4 way flashers , and all the bulbs and fuses are sound; there is no electricity on the fu...

    1991 GMC Sierra 1500 C1500 SLE Extended Cab SB


    Maintenance & Repair

  • my break lights stay on. 3 answers

    break lights wont go off. i have replaced the break light switch. this did not work. Any suggestions please.

    2013 GMC Sierra 1500 SLE Crew Cab


    Maintenance & Repair

  • Why wont my tail lights work 3 answers

    i have a 1991 gmc sierra 5.7L and my tail lights dont work but my rear signal, reverse and brake lights still work. what would cause this?

    GMC Sierra 1500


    Maintenance & Repair

  • Drivers side brake light will not work checkd bulbs fuses even switched assembly to other side n it works all other lights work running turn signals and hazzards 1 answer

    1996 GMC Sierra 3500 2 Dr K3500 SLE 4WD Standard Cab LB


    Maintenance & Repair

Search GMC Sierra 1500 Questions

GMC Sierra 1500 Experts

#1 dragonflyoffshore
Reputation 4,400
#2 John Saffrahn
John Saffrahn
Reputation 3,080
#3 Glenn Clingenpeel
Glenn Clingenpeel
Reputation 2,700
View All

Related Models For Sale

Used Ford F-150"
3,268 Great Deals out of 216,650 listings starting at $1,500
Used GMC Yukon"
563 Great Deals out of 19,457 listings starting at $2,500
Used GMC Sierra 2500"
223 listings starting at $2,895
Used Chevrolet Camaro"
797 Great Deals out of 38,852 listings starting at $2,650

Used Cars For Sale

2017 GMC Sierra 1500 For Sale
20,104 listings starting at $20,851
2016 GMC Sierra 1500 For Sale
75 Great Deals out of 13,158 listings starting at $21,510
2015 GMC Sierra 1500 For Sale
191 Great Deals out of 4,739 listings starting at $15,995
2014 GMC Sierra 1500 For Sale
147 Great Deals out of 4,295 listings starting at $12,500
2013 GMC Sierra 1500 For Sale
95 Great Deals out of 2,678 listings starting at $12,400