This is a very common problem in new-style '04 and '05 Malibus. The daytime running lights in those 2 model years (changed for '06) are in the amber parking lamps and they tend to burn out quickly. I forget all the details, but there should be a ton of documentation either in here or elsewhere on the Internet....fortunately (??) for me, I've had a minor front-end accident that required replacement of both headlamp assemblies, so my turn signal problem is gone, at least for now. I'm also seeing a lot of '04 Malibus on the road with very hazed-over headlamp assemblies. Not good.