CHEVROLET SILVERADO TRANSMISSION

Been Working On This Pickup K2500, Vin 2gcfk29s1r1261336. Transmission Will Only Shift Up To Second Gear. I Have Error Codes 83 And 56...

I Can Shift Through Every Single Gear, But Transmission Won’t Engage. -4l60e. -fluid Level Verified.

So I Was Driving And The Vehicle Jerked Then Wouldn't Go Out Of Second Gear Until I Parked Somewhere And Turned It Off. Wen I Turned It...

Won't Shift Up, Revs Super High, Speedometer Not Working Until I Hit A Bump. Changed These Items: New A/c System(entire), Brake...