mdwatts11

I think he was referring to a GM which has metal under there. From my understanding line-x won't stick to anything but metal.

Unfortunately my Sierra didn't come with them. I've never seen any GMCs sold with them.

Its really easy to install. Took me about 2 hours to finish it all. IIRC i had to rotate the bolt holes 180* to get it to go back in easily. Don't forget to get it aligned afterwards also. I went to firestone and got lifetime alignment for $115. Here's an old pic of my truck after I got done leveling it with new wheels and tires.

Looks great man. How much are the fender liners gonna run you?