I'm glad to hear everything worked out!
Chevrolet Customer Service,
Originally Posted by cardsfan09
I had the rattlers, and asked the service manager to see if they could put the GMPP mufflers on instead of the stock mufflers, cost me $60 extra and it fixed the rattle and I'm getting a little better low end torque and she just breathes easier throughout the RPM band, another bonus is that I'm now averaging 25.6 MPG !!!!!