From what I have gotten is that GMC is based more towards business force, chevy is more for the work/construction force. I think a base model GMC has more options then a Base CHEVY.. All in all the same things, diff front ends, lights

John

 

different badges front ends different fog lights mostly rounded not squares. the resale is higher and usually asking price off the lot is higher. the models are different in the options too. other than that they still get the SHITTY 4l60e goddam i hate my 4l60.