2011 Chevrolet Silverado 1500 Transmission Filter

To ensure that the pipe flares remain fully seated while clamping you must do the following: Remove and discard the exhaust band clamp, install and position a new exhaust band clamp to the pipe joint, firmly push and maintain the pipes together while tightening, confirm that the clamp edges are fully seated on the pipe, run the engine and inspect the clamp to ensure no leaks.

No, the GM machines for fluid changing cannot be used to flush fluids.