2004 Gmc Sierra Tail Lights Not Working

When the filament inside the bulb breaks it cannot illuminate the gas enclosed within the glass cover. Recently been having issues with the rear taillight assembly. The brake lights turn signals reverse lights all work but the tail lights when you head lights are on do not work.

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It is not a primary vehicle weekend warrior project vehicle but at 257k miles and not burning or leaking any fluids she s worth the continued support.

2004 gmc sierra tail lights not working.

Instrument lights not working when dash lights don t work odds are the tail lights don t work either sounds like dimmer switch may be a problem. Oct 02 2009 2002 gmc sierra 1500. I decided to replace them with led bulbs. I recently noticed i don t have any brake lights none of the 3 are working.

In many instances you can see the break in the metal strip of the fuse. Electrical is not my strong point so any help would be. When i checked the wires at the tail light only the wire that worked the turn signals had juice the other 3 did not. I have changed the bulbs fuses checked the tail light circut board checked the headlight switch.

Once and a while they will finally kick in and start working again. Noticing that some lights were not working thought the bulbs were burned out. The brake lights turn signals reverse lights all work but the tail lights when you head lights are on do not work. If the tester lights up your fuse is functioning fine.

Electrical is not my strong point so any help would be. On the 2004 silverado sierra the fuse for the trailer running lights is in the fuse box under the hood not in the passenger compartment like the fuses for the right turn brake and left turn brake. If it does not light up then replace the fuse with another of the similar amperage and size. I own a 2004 chevy silverado 1500 v8 5 3l with factory installed 5k 12k tow package.

Digital multimeter on amazon https amzn to 338al8q 12 volt test light on amazon https amzn to 2pceeuu k1500 replacement taillights on amazon https. I have changed the bulbs fuses checked the tail light circut board checked the headlight switch. On a 2004 gmc sierra service air bag message on there is no reset you have to take it to a repair shop and get the codes read to see what is causing the light to come on usually just a sensor when it is repaired the shop can use a scan tool to reset the light this would be the the only way to reset the light hope this helps good luck. Replace the fuse but before plugging the trailer back in you need to search for a short circuit on the trailer that could cause the fuse to blow.

I replaced all the brake and trailer related fuses and replaced the brake switch on the pedal and still nothing. Burnt out light bulbs the other reason your tail lights are not working but your headlights are maybe a blown bulb. When i checked the wires at the tail light only the wire that worked the turn signals had juice the other 3 did not.

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