Would 15 inch custom rims that came often a dodge fit on a GMC?

Answer 1

If the rims are a unilug specified type (4 1/2" - 5")yes. But stock rims on the older Dodges were 4 1/2" up to the 1984 year, then in 1985 went to the 5 1/4" bolt pattern, such as the Ford 1/2 ton pattern there on. The Chevy bolt pattern rings at 5" even. So, it just depends on the type of wheels you have, the lugnuts, and washers that the rims need to be placed on the vehicle in question. Look around the net and locate wheel adapters. They'll allow you to put one brand's wheels onto your GMC without the need to locate unilug rims, and also if you are storing your summer wheels, just remove the wheel adapters and put on your factory rims for the winter. Sounds sweet, eh? Hope this helps.