[Vmammolenti]

I have a 1999 GMC Sierra and my reverse lights along with my daytime running lights do not work. All other lights work fine. Any ideas?

 

[rollover]

I don't see anything in common on the electrical schematics for both of these problems. You could have multiple fuse failures. For the daytime running lights check fuses IGNE fuse 10A and DRL fuse 10A in the UBEC (underhood bussed electrical center). For the reverse lights check fuses B/U LP fuse 25A and VEH B/U fuse 15A again in the UBEC.

 

[Welcher774]

Did you pull the bulbs and inspect and or do a continuity test on each with a volt meter.

 

[Vmammolenti]

I thought I checked the fuses when I bought it, but it ended up being the VEH BU fuse