Question about 2003 Chevrolet Silverado 2500HD

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04 chevy silverrado brake lights will not work. fuses and bulbs are fine

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

jeff3211
  • 12 Answers

SOURCE: 1998 chevy lumina brake lights intermittent.

This is a classic example of turn signal switch failure. On GM vehicles with a multi-function turn signal switch and combination stop/turn/tail lights (all rear lights are behind red colored lenses except for back-up lights) The brake light power is routed through the turn signal switch. This makes it possible for the right rear light to function as a stop light while the left rear turn signal flashes, and vice-versa. When the contacts fail to remain constant the brake lights, and turn signals can become intermittent. The proof that the brake light switch is functioning correctly is that the high center (cyclops) brake light functions properly. Wiring integrity is verified if you can prove that turn signals operate, but that can still be intermittent with this complaint, BUT if you use your hazard switch to turn on all the signals at once, you can verify wiring integrity. This is because the turn signal, and the brake light use the same circuit, and bulb filament in the rear lighting assembly. If any Hazard lights fail to function, check bulbs first, then retest. If all Hazrd light flash correctly and reliably, bulbs, sockets, and wiring have proven integrity, and the turn signal switch is the remaining component in the system which needs to be tested. Unfortunately, this switch requires disassembly of the steering column for service, testing or replacement. If you have never disassembled, and successfully reassembled a GM tilt steering column, I would reccommend professional assistance.

Posted on Nov 01, 2008

  • 651 Answers

SOURCE: 1997 CHEVY TAHOE. BRAKE LIGHTS

the brake light switch. under dash behind brake peddle arm.

Posted on Jan 06, 2009

  • 1 Answer

SOURCE: chevy tahoe 1999 all 3 brake light wont work good

The Hazard warning switch is bad.

Posted on Jul 12, 2009

  • 4 Answers

SOURCE: 99 Chevy Tahoe... Rear turn signals, brake lights, and hazards

I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!

Posted on Oct 11, 2009

  • 14585 Answers

SOURCE: Brakes Lights dont work on a 2006 Chevy Silverado

I've worked on these the first drove me crazy. its the turn signal switch every thing runs thru these. head lights, turn signal, brakes. except the third brake light. it runs directly from the brake switch. go figuare

Posted on Jun 22, 2010

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1 Answer

My brake and hazard lights don't work on my 2001 Chevy Astro Van. Turn signals work fine, running lights work, and the top brake light works fine. Replaced bulbs, no change, fuses are fine. Where do I look...


Buy a cheap multimeter and measure your voltage at the bulb when the brake lights are supposed to be on. You should have 12vdc. Is your 3rd brake light and brake lights on the same fuse? If not, measure to see if you have 12vdc at the fuse itself.

Mar 01, 2015 | Cars & Trucks

1 Answer

Lower brake lights no longer work on my 2002 chevy tahoe but the 3rd brake light works fine. Checked fuse and bulbs and everything works fine. Just the 2 lower brake lights dont work.


Most of the time the problem is in the turn signal switch. The third brake light circuit bypasses the turn signals.
Someone would need to check brake light power in and out of the turn signal switch.

Feb 25, 2014 | GMC Cars & Trucks

1 Answer

All brake lights stopped working on my 04 chevy avalanche,


do you have lights on in the back if you put on the headlights if you have lights in the back when this is done check the brake light switch on the brake pedal

Nov 28, 2012 | Cars & Trucks

1 Answer

Brakes Lights dont work on a 2006 Chevy Silverado


I've worked on these the first drove me crazy. its the turn signal switch every thing runs thru these. head lights, turn signal, brakes. except the third brake light. it runs directly from the brake switch. go figuare

Jun 22, 2010 | 2003 Chevrolet Tahoe

2 Answers

I cant find where my brake light fuses are for my 03 chevy silverado. the left brake light is out and the bulb is fine, but I dont know where the brake light fuse is.


If your right side brake light is working then it won't be a brake fuse as all brake lights are on the same circuit. Check the wiring harness connection for the left side.

Feb 01, 2010 | 2003 Chevrolet Silverado 1500

1 Answer

Brake lights wont work! All others do!


I just had the same problem on my '04 Silverado. All it was was corrosion in the socket/bulb. Put some dialectic grease on both the bulbs and worked them in and out a couple of times and now they work fine. Was weird that they both went out suddenly and together but I guess they are made exactly the same.

Apr 05, 2009 | 2004 Chevrolet Silverado

1 Answer

Mazda 3 tail light on, brake light not on


The bulb actually has two seperate elements in it.
That is why the tail light works fine.

If you take the bulb out you will see the seperate elements.
Change the bulb and it should be fine.

Jan 09, 2009 | 2004 Mazda 3

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