2006 GMC Sierra clutch and flywheel replacement cost

Nailing down the exact cost of the clutch replacement of your truck will be a little hard to tell, because labor costs are different according to the area where you live, and the type of shop you take it to (dealerships usually cost more, independent shop usually a little less). Call around to find the best prices and warranty in your area.
However, one piece of advice if you are purchasing the part; be sure to buy it from a good auto parts store, such as NAPA, CarQuest, or whatever is in your are. Some of the more "popular" stores may not have parts of the same quality.