We have a '99 GMC 2500 (old style) 350 auto that has started trying to tell us something. Occasionally, when putting it in drive, it acts like the brakes are applied and it takes at least half throttle to get it to move. Once it does move, it's ok. Observers have told me that when it does start to move, the rear wheels do a lot of shuddering. Every time it has done this, I had just backed a large trailer into it's space. Maybe coincidence? I'm thinking brakes seizing or rear end going bad and trying to rationalize it, but not having much luck. Anyone have any thoughts or experiences with this?
Dave