One problem related to transmission shudder has been reported for the 2001 Chevrolet Blazer. The most recently reported issues are listed below.
Rattle in front end of vehicle coming from suspension, or wheels, can be felt in steering wheel. Also after coming to a stop after traveling on interstate vehicle shakes/vibrates in transmission/rear drivetrain area when starting. Both have been going on for a couple years, and I have had vehicle at dealer ship to repair/locate problem, but problem continues.