Primary color, exterior, Sonoma Jewel Metallic

Years 1994, 2007, 2009, 2014 Models 4 Factory citations 4

Also described as Primary color, exterior, Copper MetallicPaint, primary exterior, Deep Ruby MetallicPrimary color, exterior, Deep Ruby Metallic

Also documented for GMC

Documented applications

Corvette — C4 (1984–1996)

1994 Factory-verified

the 1994 order guide (p.30) calls colour 66 Copper Metallic; the 1994 service list calls it Light Melon

GM Heritage factory kit — 1994 Chevrolet Corvette, p.65.

Equinox — first generation (2005–2009)

2007 Factory-verified

touch-up paint WA-431P; kit color and trim page.

GM Heritage factory kit — 2007 Chevrolet Equinox, p.102.

Silverado — GMT900 (2007–2013)

2009 Factory-verified

The list marks it (07).

GM factory document — 2009 chevrolet silverado 2wd rpo code list, p.1.

Silverado HD — GMT900 (2007–2014)

2014 Factory-verified

the Sierra HD doc's GMC guides name it Sonoma Red Metallic

GM factory document — 2014 chevrolet silverado 3500hd cc fleet order guide wayback, p.1.

This page aggregates every documented appearance of 66U in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.