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  • GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)
GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)
GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)
GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)
GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)
GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)
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GMC Sierra & Chevrolet Silverado HD Block Off Plates (2023+)

Key Features:
  • CNC-machined from solid-core HDPE - does not absorb moisture, warp, or crack
  • Seals factory speaker access holes - works with factory or aftermarket speakers
  • Pre-marked alignment circles for easy positioning - mounts with 1/8-inch drilled holes
  • Dramatically improves bass response and reduces road noise
  • Front plates fit all cab styles (Regular Cab, Double Cab, Crew Cab) - rear plates fit Crew Cab only
  • Designed and CNC-machined in Mount Juliet, Tennessee


From $85.00 to $214.00




24HDGMCBlockOffPlatesSet
Product Description

CNC-machined HDPE block off plates designed to seal the factory speaker access holes in your 2023+ Sierra HD or Silverado HD (2500/3500) doors. Whether you are running factory speakers or aftermarket upgrades, the original access holes in the inner door skin allow bass energy to escape and let road noise enter the cabin. Sealing them creates a semi-sealed chamber behind the speaker for tighter bass response and a quieter ride.

Each plate features pre-marked alignment circles for easy positioning. Drill 1/8-inch mounting holes and secure with the included zinc coated screws. Foam sealing strips included to seal the plate to the door panel.

Front plates fit Regular Cab, Double Cab, and Crew Cab.
Rear plates fit Crew Cab only.

Does not fit 1500 models - see our separate listings for Sierra/Silverado 1500.

CNC-machined from solid-core virgin HDPE in Mount Juliet, Tennessee. GMC, Sierra, Chevrolet, and Silverado are registered trademarks of General Motors. Used for compatibility reference only.

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