I have a 2002 Envoy (rwd) SLT and I do know for a fact that the rear diff CAN lock. But, just out of curiosity, I was wondering how to tell if what type of differential the SLT trim has. Something that is pretty odd is that when I look up the VIN on a VIN checker website it tells me it's an SLE...

As I'm sure you guys know our front differential case uses 7.25" ring...JUUUST small enough that we can't get a limited slip differential (LSD) based on what's universally available. However, as I'm planning to do more autocrossing in my AWD TBSS, I've determined that having an open diff up...