wow what the hell i went to autozone and advance both clueless we were alll looking at everything my sevice vehicle light came on out of nowhere owners manual says thats the drl fuse or relay checked them both were normal. both stores were baffled we tried everthing then at the ver last moment i said hmm for the hell of it lets just start pulling random fuses out even if they were nothing to do with lights sure enough bam horn fuse under the hood was poped so i replced it wouldnt you know the damn lights work again. how wierd is that? honestly no surprise this car has always done random wierd things maybe thats just gm for ya though