i am too having the same issues with my 2001 malibu my friend
indeed the 15amp fuse was blown due to a tail light problem
that did not occur to me til i read this thread thoroughly
however now i have my exterior lights working again i have a problem still with o dash lights...any ideas on that.
i did take them out last night to test the wiring in the actual instrument cluster and did not realise i had no tail lights til this thread
i knew i had no DRL and that's why i am investigating
had service vehicle light on which went off with replacement of the 15amp fuse
wiggled my tail light bulbs a bit and cleaned...all now work (weird eh)
i'm gonna remove my instruments again @weekend see if i just didn't plug in properly tho...fuses fine by the way
DRL relay fine..(swapped 3 way with othere (ALC) etc)
but still no dash lights..also need to check 12v @ dimmer switch i guess
any help a bonus for me
thanks