Engine, gas, 6 cylinder, 4.3 L V6, multiport fuel injection, 90 degree

Years 2002–10, 2014 Models 6 Factory citations 23

Also described as Engine, gas, 6 cylinder, 4.3 L, multiport fuel injection, V6, 90 degreeEngine, gas, 6 cylinder, 4.3L, multiport fuel injection, V6, 90 degreeEngine, 4.3L V6 (Vortec 4300), MFI

Also documented for GMC

Documented applications

Astro — Second generation (1995–2005)

2002–2005 Factory-verified

GM factory document — 2002 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2003 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2004 chevrolet astro 2wd rpo code list, p.1.
GM factory document — 2005 chevrolet astro 2wd rpo code list, p.1.

Blazer — S-10 second generation (1995–2005)

2003–2005 Factory-verified

Wikipedia gives this generation a 4.3 L V6.

GM factory document — 2003 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet blazer 4wd rpo code list, p.1.
GM factory document — 2005 chevrolet blazer 4wd rpo code list, p.1.

Express — GMT610 (2003–2027)

2003–2010, 2014 Factory-verified

GM factory document — 2003 chevrolet express rpo code list, p.1.
GM factory document — 2004 chevrolet express awd rpo code list, p.1.
GM factory document — 2005 chevrolet express awd rpo code list, p.1.
GM factory document — 2006 chevrolet express awd rpo code list, p.1.
GM factory document — 2007 chevrolet express awd rpo code list, p.1.
GM factory document — 2008 chevrolet express rpo code list, p.1.
GM factory document — 2009 chevrolet express rpo code list, p.1.
GM factory document — 2010 chevrolet gh van elec 1 7 d1 100813, p.13.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.7.

S-10 pickup — Second generation (1994–2004)

2003–2004 Factory-verified

GM factory document — 2003 chevrolet s10 pickup 4wd rpo code list, p.1.
GM factory document — 2004 chevrolet s10 pickup 4wd rpo code list, p.1.

Silverado — GMT800 (1999–2007)

2002–2007 Factory-verified

GM factory document — 2002 chevrolet chevy c silverado 2wd rpo code list, p.1.
GM factory document — 2007 chevrolet silverado classic 2wd rpo code list, p.1.
GM Heritage factory kit — 2002 Chevrolet Silverado, p.45.
GM Heritage factory kit — 2006 Chevrolet Silverado, p.60.

Silverado — GMT900 (2007–2013)

2009 Factory-verified

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

This page aggregates every documented appearance of LU3 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.