09 Suburban 2500 - backup lights don't work but come on with unlock

[supaphly42]

Just got an 09 Burb HD, the backup lights don't work on it. But they do light up when you unlock it so the bulbs etc. are good. I checked the regular and trailer backup light fuses under the hood and the BCM fuse on the side panel, all good. The trailer lights (not sure about trailer backup) work fine. Not sure what to check next. Thanks!

[davester]

With my '04 Sierra (with a completely different wiring & computer setup from yours), my backup lights (and a couple other things) wouldn't work when a fuse to the bcm had blown.  You might check all the fuses, there might one that isn't obviously for the backup lights, but still affects their functionality.

[supaphly42]

Will do, thanks