dieselscout80
Veteran Member
It all depends on the options ordered on the truck.I have had a few Z71 and none of them had any lockers, at least not switched lockers, I know my 2wd, non Z71, would lock the rear of I put it in low gear
GM had the gov-loc for years it was kinda weak in the 10 bolt axle but in the 14 bolt it was pretty good.