ACC GMC 1947–1955 First Series Trucks Vinyl Flooring

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Your 1947-1955 GMC is a New Design truck, not an Advance Design, whatever catalogs say. These 3-piece vinyl kits fit the regular cab front floor with side extensions on 1947-1954 GMC trucks and the 1955 First Series. Later 1955 Blue Chip trucks take a different floor.

GMC shared its cab with Chevrolet in these years, but a GMC was never just a rebadged Chevy, and GMC owners know the differences by heart. Both kits here are 3-piece vinyl sets for the regular cab front floor with side extensions, in #16 Black: one for 1947-1954, one for the 1955 First Series.

Decode your GMC first

Chevrolet called its 1947-1955 trucks Advance Design. GMC named its version New Design, and the hardware backed up the separate identity:

  • Model numbers: GMC used 100, 150 and 250 series designations where Chevrolet used 3100, 3600 and 3800.
  • Engines: GMC ran its own inline sixes, the 228 and 248, not the Chevrolet 216 and 235. The dash tells the story too: GMC oil pressure gauges read 60 or 80 pounds against Chevrolet's 30.
  • Electrics: 6-volt GMCs are positive ground; Chevrolets are negative ground.
  • Grilles, tailgates, hub caps and dashes are GMC-specific even though the bodies, suspension and transmissions are shared.

That shared cab is why the floor follows the same year split as the Chevrolet, while everything you see from the driver's seat stays GMC.

The 1955 split, GMC style

GMC also sold two 1955 trucks. Early 1955 production continued the New Design as the First Series; the redesigned truck that replaced it was marketed by GMC as the Blue Chip series, its own name for what Chevrolet called Task Force. Blue Chip cabs are a different shape, with a wraparound windshield and in-cab steps instead of running boards, and they take a different floor. If your 1955 GMC still has exposed running boards and flat glass, it is a First Series and this is your kit.

Fitting notes

Coverage is the regular cab front floor with side extensions as listed, nothing more. Keep the old covering as your pattern for shifter and pedal openings (GMC offered both column-shift and floor-shift trucks), fix any rust or moisture in the pan first, and trial-fit before trimming. Because GMC cabs came off the same body line as Chevrolet, the three pieces install the same way; the patience is in the trimming, not the fitting. Fewer GMCs survive than Chevrolets, and most worked harder; a fresh molded vinyl floor is often the point where a rough Jimmy turns into a truck again.

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