Stripe, color accent, Gray Metallic

Years 1998–00 Models 2 Factory citations 6

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Also documented for Chevrolet Oldsmobile

Documented applications

Jimmy — second generation (1995–2001)

1998–2000 Factory-verified

2000 list reads medium gray; 1998 reads medium gray metallic

GM factory document — 1998 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 1999 gmc jimmy 4wd rpo code list, p.1.
GM factory document — 2000 gmc jimmy 4wd rpo code list, p.1.

Sonoma — second generation (1994–2004)

1998–2000 Factory-verified

2000 list reads medium gray; 1998 reads medium gray metallic

GM factory document — 1998 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 1999 gmc sonoma pickup 4wd rpo code list, p.1.
GM factory document — 2000 gmc sonoma pickup 4wd rpo code list, p.1.

This page aggregates every documented appearance of 90A in the GMC reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.