Today I figured out on my 1996 ram 2500 cummins truck if your ac compressor bearing is squealing you can bypass the ac unit by installing a non ac serpentine belt routed correctly by diagram under the hood and zero other modifications be back up and running in about ten minutes. I had read on other forums for gen 3 trucks you have to change tensioner pulley mount location to make non ac belt work , which may be true, and couldn't find any info on if a gen 2 had to be changed that way to, but for you guys looking for this info on a 12 valve gen 2 cummins truck if you need to bypass your ac unit you can go to the parts store, by a stock non ac serpentine belt and routed correctly not have to move tensioner pulley or arm mount location, put it on and bypass the ac pump, I did it today , belt fits perfectly with no touching or rubbing on anything that can hurt the belt. Hopefully this info can help someone, I looked all over the internet and couldn't find it for a gen 2 diesel truck