I bought this truck used about 6 years ago. I've had just a few minor problems. The tensioner for the AC belt broke. (Repaired myself for about $75). The 6 disc cd changer quit, but it was 10 years old, and well used. Overall, this truck is still very mechically sound. Very comfortable ride quality. Still runs like new. What else can I say.....I love my Avalanche.
I purchased this as a pre-owned vehicle to supplement my prior truck on account of a growing family. It has been excellent! I am pleased that its value still exceeds what I paid for it. We recently purchased a travel trailer, and it tows with an ease that makes one feel a trailer is not present. The only repair I have had is the power window motor on the passenger door - a common problem with GM trucks.
Coming from owning a Wrangler, I wanted something fun, more comfortable, but still able to be modified to be unique. Other than those that leave theirs stock, the same year/color/body Avalanche can look completely different, which is fun. I didn't buy it because I thought I was going to get good gas mileage, so no complaints there, and the savings in insurance from all the airbags and such has offset that quite a bit. This is my 15th car in the 18 years that I have been driving, and other than my 1st car (69 Ford Mustang Fastback), it has been my favorite. I will drive it till the wheels fall off...then buy another one.
I love my new avalanche. I upgraded from a 2WD Sierra w/bare essentials to the Z-71 with every option except the DVD player($1200 not worth it). What a difference. This truck is suprisingly nimble, and the turning radius is less than that of extended cab trucks(ie-easier for my wife to park). Towing capacity is solid. We towed our Grand Prix on a car trailer(total lbs= 6900) from FLA to WA state, only stopping for 9 hours and driving for 66. There were times I forgot I was even towing. What a beast! The midgate is awesome. I've halled everything from drywall(full sheets) with the tailgate closed to 3 backhoe scoops of bark.