Transmission, automatic, 4 speed, 4T65-E, heavy duty

Years 1998–05, 2008–09 Models 5 Factory citations 19

Also described as Transmission, automatic, 4 speed, HMD, 4T65-E, heavy dutyTransmission, automatic, 4 speed, THM 4T65-E, heavy duty

Also documented for Chevrolet Pontiac

Documented applications

Century — W-body (1997–2005)

1998–2004 Factory-verified

may be Regal equipment (pairs with L67)

GM factory document — 1998 buick century rpo code list, p.1.
GM factory document — 1999 buick century rpo code list, p.1.
GM factory document — 2000 buick century rpo code list, p.1.
GM factory document — 2001 buick century rpo code list, p.1.
GM factory document — 2002 buick century rpo code list, p.1.
GM factory document — 2003 buick century rpo code list, p.1.
GM factory document — 2004 buick century rpo code list, p.1.

LaCrosse — W-body / GMX365 (2005–2009)

2008–2009 Factory-verified

4T65-E heavy-duty automatic (Wikipedia names a 4T65E-HD).

GM factory document — 2008 buick lacrosse rpo code list, p.1.
GM factory document — 2009 buick lacrosse rpo code list, p.1.

Park Avenue — G-body (1997–2005)

1999–2005 Factory-verified

TriShield lists the code without a description.

GM factory document — 1999 buick park avenue rpo code list, p.1.
GM factory document — 2005 buick park avenue rpo code list, p.1.

Regal — W-body (1997–2004)

1998–2004 Factory-verified

GM factory document — 1998 buick regal rpo code list, p.1.
GM factory document — 1999 buick regal rpo code list, p.1.
GM factory document — 2000 buick regal rpo code list, p.1.
GM factory document — 2001 buick regal rpo code list, p.1.
GM factory document — 2002 buick regal rpo code list, p.1.
GM factory document — 2003 buick regal rpo code list, p.1.
GM factory document — 2004 buick regal rpo code list, p.1.

Riviera — G-body (1995–1999)

1999 Factory-verified

the 1998 list gives the same transmission as MH7

GM factory document — 1999 buick riviera rpo code list, p.1.

This page aggregates every documented appearance of MN7 in the Buick reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.