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Pros: Smooth ride
Cons: it always is in the shop
Advice: caveat emptorMy husband purchased this truck while on emergency leave from Iraq for me (his wife), and two small children. He wanted us to have a reliable vehicle while he was off at war. We truely believe it is a lemon. It has 5000 miles and has been in the shop around 6x's. The service manager admitted that they had been having problems with reports of this model having water intrusion. I have been stranded on the side of the road twice. I need this truck to go see my husband who is coming home in 2 weeks to make a 3000 mile trip. I have no confidence in the truck.
Pros: Quiet power
Cons: No expernal built-in storage compartments.
Advice: Drive this model the last and you will see the superiority of the design.This is the third Sierra I have owned - and the new 2007 is by far the most refined. I drove ALL other brands of pickups within a 4-week period and still found the Sierra the best.