Truck was driving fine was not sleeping pulled in the driveway put it in reverse backed up a little bit spun a wheel pulled in neutral rolled up a little bit put it back in reverse and had no gears it will not go in gear

My 2006 GMC Silverado won't come out of Drive even in neutral or Park and let it set for a while then it started that problem

Won't shift to third or overdrive

After replacing sway bar and transmission support bushings the vehicle is not shifting gears, it drives on first gear only.

When in auto or 4x it doesn't want to reverse, or won't shift out of 4x.
Took it to the place I bought it. And then found a bunch of personal things in it. Indicating that it was being used not fixed... they had it for almost 2weeks.

Hey guys, were having some issues sith our 2004 5.3L silverado. Rear end blew 4 days ago, chamged that. Now since than its been reving and lagging when it shifts gears, and wont shift into OD/4th gear. Its got the 37:3 gear ratio for the rear end and. Now today, as we were pulling it out of the yard (it was still in first at the time) something make a loud TING CLANK sound and all of a sudden we have nothing but 1st 2nd and reverse gears. Not sure if this issue is due to a sensor, or if the tranny/ transfercase is not shot after the rear end let go last week. Any help is very appreciated. Im at a loss and this truck is becoming my worst nightmare. Thanks!!

Put a new stereo in and a wire shorted replace the radio fuse now the transmission is not shifting correctly