1.5 ton trucks normally have 22.5" wheels(20" originally), so anything smaller is going to not fill up the fender, and look different. GM made at lease 4 different fenders I have seen, some were full width, large tire size. Came on school buses, etc., look around, might be lucky.

People have cut a fender down the middle, vertically, added a properly curved piece(2 directions) in the middle, welded it back to gether-lots of skilled bodywork required.

Last edited by EdPruss; 11/12/2012 12:02 PM.

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.