please help!! I made a $1200 mistake

[GMC3]

I have a 2006 4x4 wt with the 17" steel wheels. I found an old set of 16" alloy wheels from like an 02 and knew the lug pattern was the same so assumed they would fit and ordered 900 dollars worht of lt285 75 16 goodyeaer silent armor from tire rack. put the rear tires on w no problem and they look great. went to put them on the front and the inner portion of the wheel does not clear the brake caliper. I guess now i know why they went to stock 17" wheels. please help. any suggestions? maybe i can change out the calipers? or is everything different and i have to start over