Front diff on my '99 1500 4x4 hatched. Cracked the case open. GM doesn't offer parts according to my GM dealer. I got the impression, because this is a 1500 and not a 2500 or 3500, the front diff case and axel tube size is unique to this vehicle series. Anyway, I found a shop that can reman one, but is looking for a case. No used ones around my area. Is there a difference in case's between the 1500's and the 2500's ? 3.42 gears, 8 bolt hubs - not going to be cheap either : (