Question about 2007 GMC Sierra 1500

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2007 GMC Sierra 1500 My high brake light not working,checked bulbs and fuses,there good.What should i look for now?

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Check for power to the brake assembly. the socket board in high mounts are prone to have problems. if you have power to the socket board then it needs replaced.

Posted on Apr 10, 2011

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1 Answer

The left tail light on my trailer doesnt work.the stop and turn signal works . is there a fuse for it? i have 2011 gmc sierra 1500


There is a tail lights fuse for the truck, but not for the trailer.
First, check that your left tail light on the truck is working, if not fix the problem (new bulb, bad contact, fuse).
Then the obvious suggestions regarding the trailer are: Check the tail light portion of the bulb to be sure it is not blown. If good (best to put in new one to be sure), then check the wiring from the front of the trailer all of the way to the non working bulb, including every connection and at any place it is secured to the trailer frame. If all is good with the trailer circuit and bulb, then check the truck's trailer connector, including any adapters. If by chance the truck is wired with a flat 4 wire harness the problem may be solved (but usually the blinkers are the problem). Modern trucks require a 5 wire harness which self adapts to the standard 4 wire trailer circuit. Check for dc power (12 volts) from the truck's female connector. One wire will be ground, others will be taillights (turn on headlights), brake lights (have someone press brake pedal), and blinkers (turn on switch and blinkers).

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1 Answer

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Why does my 1995 gmc Sierra have no Dash lights

www.cargurus.com > Questions > GMC > Sierra 1500
CarGurusMay 19, 2013 - Why does my 1995 gmc Sierra have no Dash lights - was blowing fues right away found out had a after market deck problem rewired it now ...

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Brake lights won't come on after changing brake booster on 97 gmc 1500. Also won't shift into gear.


check for a bad brake light fuse! if not the fuse, the brake light switch operates brake lights and if bad you will not be able to shift it out of park, as well as the brake lights not coming on.! because you have to put foot on brake to do so. if bad switch, it wont let it out of park. it could be just out of adjustment also!! good-day !

Aug 28, 2011 | 1997 GMC Sierra

1 Answer

The 3rd/high brake light is not working .. replace light bulb with a new bulb. nothing happened. checked to see if fuse is good couldnt find it.. besides the fuse what could be the problem.. 2001 gmc...


Brake light switch. If I remember correctly, the third brake light works off a seperate circuit from the other brake lights so part of the switch could be bad.

Aug 23, 2011 | GMC C1500 Cars & Trucks

1 Answer

I have a 1989 gmc 1500 and cant get the brake lights to work i bought a new switch and they still dont work. also i got new bulbs my taillights work but the brake lights do not.


First I would check the fuses. You may have two fuse boxes. One inside and one under the hood. You can check for voltage on both sides of the brake switch to verify proper operation. That's where I would start.

Mar 09, 2011 | 1989 GMC Sierra

1 Answer

1997 gmc truck no backup light


Check if there is no power at the bulb socket or check all the fuses, if they are good you have a bad backup light switch, are a broke wire.

Jun 04, 2009 | 2003 GMC Sierra 1500

1 Answer

Brake lights quit working.


if all fuses and bulbs are ok get to the brake switch and see ifits stiff or stuck, if it just has two wires on it you could join themtogether to see if the brake lights come on though obviuosly dont leave them joined.Good luck davelee

Mar 23, 2009 | 1998 GMC Sierra

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