Gentlemen,
I have an Avalanche 2500 and for those of you who are familiar with this truck, you know the rear wheel base is 4" narrower than the front. Is there any advantage to adding 2" wheel spacers to the rear wheels to even things out? If so, do I need to change the wheel lugs to longer lugs and where can I purchase a quality set of spacers?

I can't remember where I bought my spacers from, but I did have a long conversation with the guy who made them. I paid a lot for them, $400 I think, but they great quality, and I had NO issues with them. I REALLY liked towing with them installed too. (I advise going to an 8" wide wheel too for even better handling towing, and not towing.)

I did have to grind off a tad bit of the end of the factory wheel studs with a right angle grinder. It was easy. The factory wheels studs have a hemi-type shape to the end of them, and there are no threads in this area, (think NASCAR type studs). This was to make the wheel lay flat on the spacer once everything is installed. It was super easy, and I did it in my garage in a few hours time. The spacers actually have their own studs to them. You bolt on the spacers with their included lug nuts, and torque them down to proper specs. Then, the wheel bolts to the spacer on their own studs. This is the proper way to have a spacer of this size. I had no issue with balance or vibration, even by doing my own eyeball grinding. I did measure each stud to make sure I was grinding down the same amount.

I really liked having mine. They also made the truck look a little more balanced, and you have less wandering on traffic grooved highways since the front and rear wheels are in the same track.

Check on the www.chevyavalanchefanclub.com website under the 2500 sub board(s). There are folks who have done this before. I can also point you to Outlaw Motorsports in Culpeper, VA, who can get them for you. Ask for Mark. He is a good friend, and an OSO member (OutlawMark). You can tell him I sent you. 540-829-0300

I have NO experience with these folks, but this will give you an idea of how they work: http://www.performancewheel.com/Spacers.cfm?category=6

Check at correctrack.com. Have had these on my 3/4 Burb for years. I likey!! Good luck Tracy

I have a 2000 chevy 2500hd that has the same width differance. I had a set of spacers made by performancewheel.com. 2" spacers on both sides, they slide right on. The spacers have studs in them and they come with a set of lug nuts to install them. Slap the wheels on with your stock lug nuts. I will tell you I have tested them for the last 3 yrs and no problems. Pulling, excessive loading LOL!! ect. great product. makes the truck look alot better

I pull my horse trailer w/o the spacers and have no issues.

Having said that, it would be interesting to try them.

Wannabe

http://correctrack.com/ is where I bought mine from!!