J21 ✓ Factory-verified

Chevrolet · Regular Production Option

Engineering year, 2021

Years 2021 Models 1 Factory citations 1

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Also documented for GMC

Documented applications

Colorado — Second generation (GMT31XX) (2015–2022) →

• 2021 ✓ Factory-verified internal

  ; shown only in the shared Colorado/Canyon upfitter lists; 2021 from the upfitter list GM files for 2021 and 2022

  ⛭ GM factory document — 2022 chevrolet 22 canyon colorado electrical body builder sm en us 2021oct15, p.11.

This page aggregates every documented appearance of J21 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.