The tire size for your vehicle is 250/70 R16. I would suggest that you check out www.tirerack.com. They can tell you what type of tire you might consider for your vehicle and why.
You could also contact a Buick dealership and find out which tire brand they recommend for your vehicle.
〉 Answered on Mar 15th, 2007 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines