[66Gilbert]

Originally Posted by GMCBURB

Maybe too obvious but a couple of differences I'm aware of are with the grill letters and hubcaps. The 64-65 grill letters (G and C) were oval shaped while in 66, the G and the C were more squared off... plus the 66 had a groove running though the letters which was painted red. The hubcaps for a 66 had a raised ridge around the center and also at the edge of the three pointed star shape (or whatever you call it). The 64-65 hubcaps were flat here.

Originally Posted by duallyjams

to add to this, on 64 GMC the head light ring used two screws and a spring in 65 the head light ring used three screws to hold the head light and the spring was moved to the head light bucket, 66 used dull wiper arms and the top of the dash was darker, 66 head windshield washer and back up lights both of these were option before 66.
No big changes just a bunch of little things.

Thanks Guys, I have asked this question before with no response. Good information to know on the GMC's. Chevrolet identification is no problem if it has the correct emblems.