Hi, my name is Rob and I have a 99 tahoe. It's in tip top shape but I've been experiencing some belt squealing. The belt started ticking while I was driving so I figured it was time for a new belt. I cleaned and degreased the pulleys and installed a quality belt. The ticking stopped but now it squeals when I start the engine. The volt gauge shows 12v in the on position and the belt squeals until it reads roughly 14v. I had my battery and alternator tested, both passed. So I replaced the belt tensioner assembly yesterday and it's still making noise! Very frustrated! I noticed most of the noises coming from the AC compressor pulley. I pulled the fuse and it helped a little bit, any ideas! Kind of a novice truck enthusiast, looking for a more qualified opinion. Thanks! ---------- Post added at 08:27 PM ---------- Previous post was at 07:48 PM ---------- So I pulled the 10amp fuse for the AC and ran the motor for a while and it hardly made any noise. I turned off the motor, put the fuse back in and tuned the motor on again with AC on Max and it was extremely loud. Hope someone can shed some light on this problem.