GNO — Slate Gray Metallic
Metallic finish. Also sold as Slate Grey Metallic. Used on 1 Chevrolet model across 1 model year in our database.
Swatch is an on-screen approximation, not a measured match.
Naming note. WA-633D. RPO ends in a letter O, not a zero. GM Authority's roster table spells it 'Slate Grey Metallic'; its article text and GM's own literature use 'Gray'.
Where GNO was used
| Model | Model years |
|---|---|
| Chevrolet Silverado 1500 | 2024 |
Slate Gray Metallic (GNO) — order touch-up paint mixed to this code. Check the code on your door jamb before ordering.
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Other Chevrolet grays
Easily confused with GNO — check the code, not the name.
Reading a Chevrolet paint code
Three-character RPO code beginning with G (letter + two alphanumerics), e.g. GAZ, G7C, GB8, G6M. Each paint also carries a four-character WA number, written WA-8624 or WA8624 and sometimes as a U-prefixed equivalent (U8624).
GM assigns every factory paint two identifiers. The RPO (Regular Production Option) is what the vehicle's own labelling shows and what dealers order by, so it is the primary code here; the WA number is the paint-manufacturing code that touch-up bottles, spray cans and refinish systems are sold under, and is recorded in nameNote for each colour. The two are 1:1 for a given colour (GAZ = WA-8624 Summit White). Body-shop paperwork may show the WA number as BC/CC U8624 (basecoat/clearcoat) or, on two-tone vehicles, as U#### for the upper body and L#### for the lower. Beware digit/letter confusion in the RPO: characters 2 and 3 can be either, so GA0 (Northsky Blue) ends in a zero while G6O (Pacific Blue) ends in a letter O, and retailer listings frequently transpose them.