Talk to Randy at GM Truck Center. His user name on here is doctor4x4. He's a great guy to talk to and has quite a bit of knowledge in regards to 4x4s. I've never had any work done at GM Truck Center but I have been to their shop. The shop looks like a Chevy Blazer specialty shop with all the Blazers they have there. I have only heard good things about this shop and wouldn't hesitate to have them do work for me if I needed their services.
I baught my 89K5 silverado from the owner Henrik for a very good price and he has done a lot of work for me. Diff covers new BDS rear springs. He very knowledgeable and I would highly recommend him. /forums/images/graemlins/k5.gif