dash lights and trunk button wont work

im an idiot and dont know anything. on my 2003 impala, the dash light with speedometer, gas gauge, heat controls etc. dont work. the speedometer and radio lights do work, but at night they get very very dim. could this be a fuse? i dont have a manual either so if anyone could tell me which one, i would appreciate it.

also, my trunk button will not open the trunk.

anyone know where i could get a manual too?

thanks a lot

Hello, Just got the same problem with my 2003 Impala.
PRNDL,and Radio light up just fine during the day, As soon as the automatic headlamps go on, the dash and radio display dim out.
I fooled the auto headlamp sensor with a flashlight so that the lights were under manual operation. The radio and PRNDL lights work, however the dash light dimmer does not. All Fuses are O.K., Also replaced the BCM and reprogrammed with a tech 2. Same problem........ HELP