Brandon,
What model 3100 truck do you have? Pickup, panel, Suburban ??
Does the Maroon interior paint cover the entire interior?
There were two different maroon
exterior colors between 47-53.
There was a maroon interior color used on some 1954 Suburban interior parts (but not on the interior roof).
And, an interior Maroon paint was supposedly also used on some 54/55 pickups/panels with a special/deluxe two-tone interior.
As Curt B. asked, where did you find this information:
"According to GM, the paint codes were on the body tag."? Might you have a Canadian truck? I'll try to remember to check my 1954 Canadian Chevrolet Truck Shop Manual (and Truck Data Book) this evening.
As Brad posted,
1954 door post ID plate (vehicle serial number)