CarPaintCode
20U Impression Blue Metallic

GM paint code 20U

Impression Blue Metallic, also listed as Silver Metallic, Twilight Blue Metallic.

Code
20U (also seen as 21B, 4CU, 603R, 692R, 923K, 98K, GBK, W-923K)
Finish
Metallic
Colour family
Black
Years
2008–2024
Models
7
Screen colour
#00203F approximate

GM models with paint code 20U

ModelYearsColour name
GM Astra2008–2024Impression Blue Metallic
GM Aveo2008–2024Impression Blue Metallic
GM Lova2008–2024Impression Blue Metallic
GM Malibu2008–2024Impression Blue Metallic
GM Regal2008–2024Impression Blue Metallic
GM Vibe2008–2024Impression Blue Metallic
GM Wave2008–2024Impression Blue Metallic

Where to find code 20U on your GM

Service Parts Identification (SPID) label. A code starting with WA followed by digits (for example WA8555), or a three-character code such as GAZ; the line often starts with BC/CC and U.

Full guide with diagram →

Touch-up paint for Impression Blue Metallic

Ask for GM 20U and give the model year: paint suppliers mix by code, and some codes have several variants (this one also appears as 21B, 4CU, 603R).

This is a metallic colour: it needs a basecoat and a clear coat. Pens and aerosols for metallics usually come with a separate clear.

Read the touch-up paint guide before you start.

Similar GM colours

343XBlue Sapphire Metallic2014 151LImperial Blue Metallic2004–2009 815KArrival Blue Metallic2003–2007 705UOpulent Blue Metallic2012–2024 406PAll Terrain Blue2006–2012 703JSuperior Blue Metallic2003–2007 218MLaser Blue Metallic2005–2017 650GSapphire Metallic2020–2024