New shocks for '06 GMC Sierra 1500HD?? (Rear end bounce)

Yes, not to difficult. Just need a good floor jack and a set of jack stands. Let us know how it turns out.

When you take the stock ones off compress them and see if any of them return to full length. WHen they don't, you'll know right away they are shot. Your basically just riding on the leaf springs at this point and that is why your back end is bouncing.