Cooling system, transmission oil

Years 1968, 1991, 1993–10, 2014–19, 2022–26 Models 12 Factory citations 52

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Also described as Air injection reactor deleteCooler, transmission oilCooling system, transmission oil, internal

Also documented for Cadillac GMC

Documented applications

Camaro

1968 Single-source

export

Camaro — Gen 6 Alpha (2016–2024)

2016, 2019, 2023 Factory-verified

GM factory document — 2016 chevrolet camaro fleet order guide wayback, p.1.
GM factory document — 2019 chevrolet camaro fleet order guide wayback, p.7.
GM factory document — 2023 chevrolet camaro fleet order guide wayback, p.4.

Caprice — fourth generation, B-body (1991–1996)

1994, 1996 Factory-verified

the 1995 sheet prints KOI

GM Heritage factory kit — 1994 Chevrolet Caprice, p.67.
GM Heritage factory kit — 1996 Chevrolet Caprice, p.116.

Express — GMT600 (1996–2002)

1998–2002 Factory-verified

the 2001–2002 lists read "Cooling System Trans, Oil"

GM factory document — 1998 chevrolet express rpo code list, p.1.
GM factory document — 1999 chevrolet express rpo code list, p.1.
GM factory document — 2000 chevrolet express rpo code list, p.1.
GM factory document — 2001 chevrolet express rpo code list, p.1.
GM factory document — 2002 chevrolet express rpo code list, p.1.

Express — GMT610 (2003–2027)

2003–2010, 2014–2018, 2022–2026 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.15.
GM factory document — 2014 chevrolet gh van elec bbm si brief, p.7.
GM factory document — 2015 chevrolet express savana electrical body builders manual service manual 2015 en us, p.13.
GM factory document — 2016 chevrolet express savana electrical body builders manual service manual 2016 en us, p.8.
GM factory document — 2017 chevrolet express savana electrical body builders manual service manual 2017 en us, p.8.
GM factory document — 2018 chevrolet 18 express savana bodybuilders sm 2017nov06, p.16.
GM factory document — 2022 chevrolet 22 express savana electrical body builder sm en us 2021oct12, p.13.
GM factory document — 2023 chevrolet 23 express savana body builder sm en us 2022sep13, p.14.
GM factory document — 2024 chevrolet 24 express savana body builder manual 18553161 2023oct26, p.14.
GM factory document — 2025 chevrolet my25 express savana electrical bbm, p.12.
GM factory document — 2026 chevrolet my26 express savana electrical bbm, p.12.

Impala SS — seventh generation (1994–1996)

1994 Factory-verified

standard transmission oil cooler (1994 standard equipment summary)

GM Heritage factory kit — 1994 Chevrolet Impala, p.59.

Impala — ninth generation (2006–2016)

2006–2009 Factory-verified

GM factory document — 2006 chevrolet impala rpo code list, p.1.
GM factory document — 2007 chevrolet impala rpo code list, p.1.
GM factory document — 2008 chevrolet impala rpo code list, p.1.
GM factory document — 2009 chevrolet impala rpo code list, p.1.

Lumina — first generation, W-body (1990–1994)

1991, 1993 Factory-verified

required with the MX0 on the Z34 and Euro 3.4; 1992 is not claimed: the page that prints it (1992 p.55) carries no readable model-year field

GM Heritage factory kit — 1991 Chevrolet Lumina, p.14.
GM Heritage factory kit — 1993 Chevrolet Lumina, p.72.

Lumina — second generation (1995–2001)

1995–1999 Factory-verified

GM factory document — 1998 chevrolet lumina rpo code list, p.1.
GM factory document — 1999 chevrolet lumina rpo code list, p.1.
GM Heritage factory kit — 1995 Chevrolet Lumina, p.52.
GM Heritage factory kit — 1996 Chevrolet Lumina, p.102.
GM Heritage factory kit — 1997 Chevrolet Lumina, p.69.
GM Heritage factory kit — 1998 Chevrolet Lumina, p.43.
GM Heritage factory kit — 1999 Chevrolet Lumina, p.59.

Monte Carlo — fifth generation, W-body (1995–1999)

1995–1999 Factory-verified

GM factory document — 1998 chevrolet monte carlo rpo code list, p.1.
GM factory document — 1999 chevrolet monte carlo rpo code list, p.1.
GM Heritage factory kit — 1995 Chevrolet Monte Carlo, p.72.
GM Heritage factory kit — 1996 Chevrolet Monte Carlo, p.78.
GM Heritage factory kit — 1997 Chevrolet Monte Carlo, p.92.

Monte Carlo — sixth generation (2000–2007)

2006–2007 Factory-verified

GM factory document — 2006 chevrolet monte carlo rpo code list, p.1.
GM factory document — 2007 chevrolet monte carlo rpo code list, p.1.

SS — single generation (2014–2017)

2014–2016 Factory-verified

S; 2015–2016: deleted when MN6 is ordered

GM factory document — 2014 chevrolet ss fleet order guide wayback, p.4.
GM factory document — 2015 chevrolet ss fleet order guide wayback, p.6.
GM factory document — 2016 chevrolet ss fleet order guide wayback, p.4.

This page aggregates every documented appearance of KD1 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.