First guess bulb bad but not that lucky.
2001 gmc sierra tail lights not working.
Electrical is not my strong point so any help would be.
Connect the light switch to a good ground with a jumper wire and press the brake pedal.
I noticed the drivers side tail light was not working.
Start at the bulb fixtures cleaning and refastening.
Rear parking lights dont work 2001 gmc sierra it would then be a bad ground.
The brake lights turn signals reverse lights all work but the tail lights when you head lights are on do not work.
When i checked the wires at the tail light only the wire that worked the turn signals had juice the other 3 did not.
Chevy truck forum silverado sierra gmc truck forums.
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Nov 07 2011 2 38am.
Electrical is not my strong point so any help would be.
I have changed the bulbs fuses checked the tail light circut board checked the headlight switch.
If the brake light turns on you have to fix the ground connection.
I have changed the bulbs fuses checked the tail light circut board checked the headlight switch.
The brake lights turn signals reverse lights all work but the tail lights when you head lights are on do not work.
It could happen due to a loose connection of the wire or the corrosion or damage of the wire ends.
Changed bulbs out and did nothing.