Question about 2004 GMC Envoy

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GMC 3500HD Brakelights work intermitently

Brake lights work only when braking hard. this problem is not consistent sometimes they work properly.

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Yes Bonedivers is right when he says it is probably the brake-light switch which is located on the arm of your brake pedal under the dashboard. Most of them are easily replaced and not real expensive. That is the cheapest route to go first.

Posted on Jul 29, 2009

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Brake switch under dash bad or out of adjustment.

Posted on Jul 27, 2009

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I've got a 1975 GMC Sierra C15. The tail lights and turn signals work just fine but the brake wont come on. Can anyone help me out? The tail lights turn signals and brakelights all work on one bulb.


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I have a 2003 gmc Sierra none of my brakelights are working I have replaced the brakelight switch and checked all fuses still nothing looked for burnt or raw wires there are none what else could it be


have you checked for a box under the hood on the drivers side, consisting of relays and fuses. i would check for a brake light relay switch, or brake light fuse, hope that this information has been helpful to you.

Mar 05, 2011 | 2003 GMC Sierra 1500

1 Answer

Brakelights work sometimes.


Check your brake lamp switch. Most likely your problem.

May 29, 2009 | 1996 Ford Explorer

1 Answer

Brakelights are not working


check your fuses and if their ok check your bulbs it rare but seen then both go out before.If there ok the next thing would be that the brake pedal is not seperating the distance that it should from the switch being that you have new rotors and brakes.

Mar 21, 2009 | 2000 GMC Sierra 3500

2 Answers

Brakelights not working


Dear Customer,

IT 's a major problem with GMC models,i don't know why company not trying to fixe up this problem,but anyway you have to rearrange your sensors with reconnecting & cleaning you all wiring,

than its may work,but before that you must check your sensors that its work properly or not,

THNX

May 20, 2008 | 1997 Chevrolet Lumina

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