Chainsaw, 12secondnova, The special paint code was also used for factory colors that weren't designated for a specific vehicle. Like a car color to be used on a truck. Or a medium/heavy duty color on a light duty truck. Or even a GMC only color used on a Chevrolet truck. I looked for similar colors from other types of vehicles in 72 and came up with this color as a guess. Try having a pint of it mixed up if you think it's close. Code 503 in 1972 is a GMC light duty color or a Medium/Heavy Duty color. This is only a guess, your probably going to have to color match it. 001 special paint codes re near impossible to decode without additional dealer paperwork.
