Hi everyone. My 04 Silverado 2500HD only has 1 of the 2 left rear signal bulbs working. I have replace all the bulbs and replaced the wiring harness from the terminal by the rear bumper to the light but still only 1 of the 2 bulbs flash. The right side has both bulbs flashing when activated. Anyone have a solution? Thanks.

 

It may sound stupid, but be absolutely sure that you have the correct part number for the bulb. You would be quite surprised that two or even three different (and improper) bulbs will fit the socket.

 

Thanks JK 23112. I know what you mean. I went to Chevy parts and they gave me #3157 bulbs. I now think it's the rear junction terminal block that's just above and to the left of the spare tire. Chevy parts said they have sold 6 in the last year and it's not a large dealer. I will get a new one tomorrow and see if that solves the problem.

 

Have you checked your blinker fluid?

 

lol...yeah, it's located between my ears and it's kinda thick and low...