20A ✓ Factory-verified

Chevrolet · Regular Production Option

Grand Sport Heritage hash marks, Admiral Blue

Years 1998, 2017, 2027 Models 3 Factory citations 3

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Also described as Fender hash marks, BlueStripe color accent, Dark Royal Blue

Also documented for BuickCadillacOldsmobilePontiac

Documented applications

Corvette — C7 (2014–2019) →

• 2017 ✓ Factory-verified

  only in: Grand Sport; Grand Sport 3LT: O; part of Z25 Collector Edition

  ⛭ GM factory document — 2017 chevrolet corvette fleet order guide wayback, p.1.

Corvette — C8 (2020–2027) →

• 2027 ✓ Factory-verified

  only in: Grand Sport, Grand Sport X

  ⛭ GM factory document — 2027 chevrolet corvette fleet order guide rpo codes, p.1.

Malibu — Fifth generation (1997–2005) →

• 1998 ✓ Factory-verified

  GM prints "(94)". platform-list code; the Malibu 1997–1999 kit order guides do not show it.

  ⛭ GM factory document — 1998 chevrolet malibu rpo code list, p.1.

Related codes · mentioned in these notes

3LTZ25

This page aggregates every documented appearance of 20A in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.