I had to find an alternate belt length for mine. If you have an L98 alternator pulley the recommendation is an 80 inch (2030mm) belt, and if you have the LT5 alternator pulley the recommendation is an 80.2 inch (2038mm) belt.
I have the lt5 pulley, so I cannot fit the 2030mm belt on (believe me I tried haha), but with the longer belts I just couldn't get rid of the belt squeal. No bad bearings, replaced tensioner with rebuilt units multiple times, etc. It drove me crazy.
Finally did a deep dive into serpentine belts and found some foreign cars used a 2035mm 6 rib poly v belt. Falls pretty nicely between the two recommended lengths. Ordered one, and that did the trick. Fits on nicely, no squeal.
Here's the spreadsheet I had made during this. Shows what options are out there.
