Engine, gas, 6-cylinder, 3.4 L, multiport fuel injection, high output

Years 1996, 1998–05 Models 4 Factory citations 17

Also described as Engine, gas, 3.4L V6, multiport fuel injection, high outputEngine, gas, 6 cylinder, 3.4L, multiport fuel injection, high outputEngine, 3.4L V6, sequential fuel injection

Also documented for Buick Chevrolet Oldsmobile

Documented applications

Aztek — U-body (2001–2005)

2001–2005 Factory-verified

The 2003 list prints sequential fuel injection; the other years print multiport.

GM factory document — 2001 pontiac aztek awd rpo code list, p.1.
GM factory document — 2002 pontiac aztek awd rpo code list, p.1.
GM factory document — 2003 pontiac aztek awd rpo code list, p.1.
GM factory document — 2004 pontiac aztek awd rpo code list, p.1.
GM factory document — 2005 pontiac aztek awd rpo code list, p.1.

Grand Am — Fifth generation (1999–2005)

1999–2005 Factory-verified

The 2003 and 2004 lists word it sequential fuel injection.

GM factory document — 1999 pontiac grand am rpo code list, p.1.
GM factory document — 2003 pontiac grand am rpo code list, p.1.
GM factory document — 2005 pontiac grand am rpo code list, p.1.

Montana — U-body second generation (1997–2005)

1998–2005 Factory-verified

the 2003–2005 lists read sequential fuel injection

GM factory document — 1998 pontiac trans sport ext rpo code list, p.1.
GM factory document — 1999 pontiac montana ext rpo code list, p.1.
GM factory document — 2000 pontiac montana ext rpo code list, p.1.
GM factory document — 2001 pontiac montana ext rpo code list, p.1.
GM factory document — 2002 pontiac montana ext rpo code list, p.1.
GM factory document — 2003 pontiac montana ext rpo code list, p.1.
GM factory document — 2004 pontiac montana ext rpo code list, p.1.
GM factory document — 2005 pontiac montana 4wd rpo code list, p.1.

Trans Sport — U-body / GMT199 (1990–1996)

1996 Factory-verified

the only 1996 engine, with the M13 4 speed automatic: Wikipedia's Trans Sport infobox gives LA1 for the generation, its first-generation section says the 3.4L V6 replaced both earlier engines for 1996, and its 60° V6 article lists the Trans Sport 1996–1998 under LA1 (1997–1998 belong to the second generation); the 1996 power teams page prints LA1 as its only engine code; shared U-body code; cited from the Chevrolet Lumina APV kit

GM Heritage factory kit — 1996 Chevrolet LuminaAPV, p.4.

This page aggregates every documented appearance of LA1 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.