Left Rear Turn Signal Failure ‘21 Duramax

[BAveryP]

I have a 2021 Chevrolet Silverado 2500HD LT 4x4, CC, SB with the 6.6L Duramax Diesel engine. The trucks left rear turn signal does not work, looks to be a bulb on the top of the tail light and one on the bottom - a warning comes up on the dash “Left Rear Turn Signal Failure” but I cannot find that fuse anywhere in my wonders manual.. any help would be greatly appreciated!

[diyer2]

Bad bulbs?

[kylant]

fuse

 

[RedLT]

He's been blinking with invisible blinkers since he can't check on his own post. Why post??