Question about 1998 GMC Sierra

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Brake lights on GMC truck do not work replaced fuses & bulbs

Blinkers work just fine

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  • Anonymous Mar 15, 2014

    change all fuses and bulbs. still do not have back tail running lights not working. I do have blinker lights headlights and brake lights but no tail lights.

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  • GMC Master
  • 1,869 Answers

Ther is a switch called a brake lifgt switch that has a pin that is moved by your boot brake pedal arm.
the way it works is: when you press on the brake the brake pedal moves down and the spring in the switch pushes out closing the contacts to your brake lights the switch is located high up under the driver's side of the underside of the dash near or, on the brake pedal support replace or, adjust this switch

Posted on Apr 24, 2009

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Posted on Jan 02, 2017

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1 Answer

No brake lights


No , if your blowing a fuse it is the result of a short to ground on the electrical circuit , wiring ! Do you know how to do automotive electrical trouble shooting ? Using a volt meter ? Do you know what a wiring diagrams is ? How to read one.
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
Free wiring diagrams here
http://www.bbbind.com/free_tsb.html Enter vehicle info. under system click on lighting , subsystem click stop lamps . Then click the search button , then the blue link. Use the wiring diagram to pin point testing locations in the circuits . Check out videos on youtube on finding a short .
how to find electrical short on most any car or truck
Finding The Source Of Electrical Shorts In Your Car


Jun 23, 2017 | 2004 GMC Canyon

3 Answers

Tail lights are not working correctly


I have to believe that with all of the "non related" issues happening that there is a wiring harness problem. If you track the harness back from the tail lights you will probably find a nick or a break in the line. If nothing shows then check the connection point which should be somewhere around your fuel tank. It will be a male/female fitting that will pull apart and you can check at that point with a meter if it is working to that point. If not it then you will have to work your way all the way up to find the fault point.

Feb 12, 2014 | 2004 GMC Canyon

1 Answer

94 gmc pick up pops brake fuse right away changed brake light switch and blinkers and tail lights still work y no 4ways or brake lights??


Check your brake light switch located under the dash on the top of your brake pedal,also it could be a broken tail or brake lite bulb.

Jan 22, 2011 | 1995 GMC Yukon

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Rear blinkers and brake lights on 2001 ford focus not working


yes it sounds like the turn signal switch is defective, the brake lights go through that switch as well.

Sep 06, 2009 | 2000 Ford Focus

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1997 GMC Sierra p/u. Brake light & blinker out. Lamp & fuse ok.


you probably got the wrong bulb
those are usualy a different number higher wattage, they look exactly like an 1127 but are a 2027 or even a 3027 check the bulb base it has the number printed on it

Aug 30, 2009 | 1997 GMC Jimmy

1 Answer

1997 GMC Sierra p/u. Brake light & blinker out. Taillights ok.


I have notice that this is a common problem. The socket most of the time goes bad, I don't know why but they just do. You can pick them up at any parts store for around 5.00 each. If you don't have a volt meter and ground straps to test it right, then I would try changing the sockets out. Quick and easy. Let us know how it goes.

Aug 30, 2009 | 1997 GMC Jimmy

1 Answer

I have a short to ground problem with my tail/crtsy light circuit ( keeps poppin fuses when the light swith is pulled to on position) also dash lights & tail lights don't work but interior light is on...


Try removing the bulbs from the rear tail lights you have one 2 bulb system shorting out, so one at a time remove the bulbs then replace the fuse and see which one is bad or just buy new bulbs and replace, also could be front running light blinker light. But sounds like brake light to ground threw bulb.

Jun 13, 2009 | 1985 GMC S-15

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