2021 Chevrolet Silverado 1500
11 factory colors were offered on the T1XX (fourth generation), pre-refresh Silverado 1500. Your code is on the driver's door jamb sticker on the line marked C/TR — the characters before the slash.
Changes from 2020:
- Added for 2021: Mosaic Black Metallic (GB8), Oxford Brown Metallic (GNK), Cherry Red Tintcoat (GSK)
- Dropped after 2020: Havana Brown Metallic (G2X), Cajun Red Tintcoat (GPJ)
Verified against 4 independent sources: Chevrolet 2021 Silverado 1500 catalogue (official brochure), per-trim colour lists with RPO codes: https://cdn.dealereprocess.org/cdn/brochures/chevrolet/2021-silverado1500.pdf; GM Authority, '2021 Chevy Silverado 1500 Gets New Oxford Brown Color: First Look' (states eleven total colours, three new / two deleted; GNK = WA-334E): https://gmauthority.com/blog/2021/05/2021-chevy-silverado-1500-gets-new-oxford-brown-color-first-look/; GM Authority, 'Here's The New Cherry Red Color For The 2021 Chevy Silverado 1500' (GSK = WA-252F, only tintcoat offered): https://gmauthority.com/blog/2021/05/heres-the-new-cherry-red-color-for-the-2021-chevy-silverado-1500/; PaintRef 2021 Chevrolet Silverado cross-reference: https://paintref.com/cgi-bin/colorcodedisplay.cgi?make=Chevrolet&model=Silverado&year=2021.
Three colours added - Oxford Brown Metallic (GNK, replacing Havana Brown), Cherry Red Tintcoat (GSK, replacing Cajun Red Tintcoat) and Mosaic Black Metallic (GB8) - against two deleted (G2X, GPJ), giving eleven. Per-trim availability from the catalogue: WT gets eight (GAZ, GAN, G9K, GJI, GNK, G7C, GA0, GBA); Custom and Custom Trail Boss add Cherry Red Tintcoat; LT, RST and LT Trail Boss add Iridescent Pearl Tricoat; Mosaic Black Metallic (GB8) is a late-availability colour limited to LT, LTZ and High Country; High Country omits Shadow Gray Metallic and Red Hot; LTZ omits Red Hot. Iridescent Pearl Tricoat and Cherry Red Tintcoat are the two extra-cost colours.
Where to find your paint code
Driver's-door B-pillar Certification label - scan the 2D QR/data-matrix code (all 2018-and-later Chevrolet, Buick, Cadillac and GMC vehicles) to list every RPO code fitted, paint included.
Driver's door jamb
- Open the driver's door and find the Certification label on the B-pillar or door jamb.
- Scan the square 2D QR/data-matrix code on that label with a phone. It returns the VIN plus the full RPO list.
- In the returned list, the paint RPO is the three-character code starting with G (e.g. GAZ, G6M, GXD).
- If the vehicle predates the QR label, open the glove box and read the 'Service Parts Identification' (SPID) placard instead - it prints the same RPO list as plain text.
- Cross-check against the WA number if you are buying touch-up paint: retailers index by WA, not RPO.
If the sticker is missing or faded
- Service Parts Identification (SPID) placard - glove box on Silverado/Sierra; trunk floor or driver's door panel on cars
- Original window sticker (Monroney), which names the exterior colour in plain language
- Dealer parts department VIN lookup, which returns the build's full RPO list
- GM Vehicle Diagnostics / MyChevrolet app build data for later vehicles
Other Silverado 1500 years
Color availability changed year to year. Codes often carried over; names sometimes did not.