found some good looking rims on craigslist that came off of a 99 grand am gt. will they fit my bonnie?

The offset might be different but the bolt pattern is the same. I would check brake caliper to wheel clearance as that would be an issue. I believe the GA'* had 16'* on them, if you have 16'*, game on. If you have 17'* you should stay with that or bigger.

the rims of the ga are 18'* and i believe my rims are 16'*.

Can you post a pic or a link?

ok, these were the two i have been looking at.
18'' American Racing Rims & Tires
REDUCED - 18" Rims/Tires off from Grand Prix

I thought you were talking OEM wheels. My bad. They should fit. I would call and find out the overall height of the tire, whichever set you choose, and measure your overall height. I had the set from the GA on my GA and had a hard time keeping them nice, the clear coat peeled off easily. What color is your bonne?

mines green with 20% tint all around. originally i wanted to powder coat my oem wheels and powder coat the ssei badges but ive been having second thoughts on that lately.

powder coat them black that is.

Should fit fine, GP was 42mm, Bonne 45mm. They will ride tucked in 3mm. Those gForce KDWS tires/that size were on my GXP, should ride under yours fine. Deep wide grooves, Good tire in rain and snow, soft tire compound (seems you need one for the other) I bought 4 at TireRack for at a closeout price of $78 a peice. Awesome buy but the fronts were nearly bald at 20k miles with a bit of boiling the tires inbetween. For comparison, I only got 18,000 of the Goodyear RSa'* on the front.

This is just my two cents. I would go with the ones of the Grand Prix for two reasons:

1. I know the offset is real close to what you need
2. The tire size should be close to what you need on a +2 upgrade

It'* completley your call though