I also have a 2005 Colorado, I've had noises coming from the front end when I turn left or right. I took it into the dealership many times for
many things while under warranty. This was one of the things they couldn't find anything a problem with. It originally made noise only in right turns but about a year ago it started making noise in right or left turns. I've looked many times under the front end found nothing loose or worn. Good luck.