YK6 ✓ Factory-verified

Chevrolet · Regular Production Option

Identification, SEO

Years 1978, 2007, 2021–23 Models 4 Factory citations 3

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Also described as Processing optionIdentification (SEO)

Also documented for BuickGMC

Documented applications

Corvette (C3) →

• 1978 ◑ Single-source

  Internal code; no price/count

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

• 2021–2022 ✓ 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.14.

Express — GMT610 (2003–2027) →

• 2023 ✓ Factory-verified internal
  ⛭ GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.16.

Uplander (2005–2008) →

• 2007 ✓ Factory-verified internal
  ⛭ GM factory document — 2007 chevrolet uplander rpo code list, p.1.

This page aggregates every documented appearance of YK6 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.