General description :
The 1965 GMC Series 1000 1/2 Ton Stepside Pickup in Gun-Metal Grey exterior over newly upholstered matching grey leather interior, comes equipped with a strong V8 motor, automatic transmission, power front disc brakes, and 12 bolt rear end. The interior features new custom sound, ipod ready stereo, new rear view mirror, new dome light, center console with horseshoe shifter -- all managed from newly upholstered leather seats. The bed features new red oak slats with new stainless steel strips and hardware. An original California black plate truck which is mechanically sound. For $19,950
Did you ever mistake a Chevy pick up for GMC? No wonder as those have been virtually identical apart from the grill and logo since the 20's.
The difference is Chevrolet trucks were marketed towards private users, while GMC was intended for commercial use, so it's more about market segmentation than anything else.