launch shudder

The folks at Chevy may be correct when suggesting you replace the drive shaft in your 2000 2500 pickup with a one piece unit. There is a factory service bulletin stating such - #01-04-17-001B. Perhaps if you contact Chevrolet customer assistance 1.800-222-1020 they will help with the cost of the repair. This is a service bulletin not a recall on your drive shaft. What that means is that if your vehicle is out of warranty you are responsible for the cost of the repair.