I need help with fuses????

[roblandscape]

I have a 2003 Gmc 2500hd. My reverse lights and dome light is not woorking I tested all the small fuses under the hood and by the drivers door but they all worked??? I hope I missed one. Does anyone know what the fuse abbreviation for the reverse lights and dome light is. Thanks Alot

[roblandscape]

I have a 2003 Gmc 2500hd. My reverse lights and dome light is not woorking I tested all the small fuses under the hood and by the drivers door but they all worked??? I hope I missed one. Does anyone know what the fuse abbreviation for the reverse lights and dome light is. Thanks Alot I checked the B/U Lp 20a and it was good

[roblandscape]

still not working