Outer Limits 4x4 Board

hi
i recently purchased a GU, upgrade from a GQ. GU has stock 16 inch rims, i want to change them. My question is do 15 inch rims fit?? Will they clear the brakes?? Only asking as seems like every rim i find is 15 inch.....
any help would be great...thanks

what year

its a 1999 GU

i have a gu 99 ute and got 15s on think its the 4.8ltrs that they wont fit

15" rims will fit all GU's, OTHER THAN the 4.8 petrol which has bigger brake calipers, and needs 16" rims minimum.