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  2. Auto Parts
  3. Belts and Cooling
  4. Gaskets and Sealing Systems
  5. Engine Coolant Thermostat Seal
  6. ACDelco 12S3

ACDelco 12S3 Engine Coolant Thermostat Seal

ACDelco 12S3 Engine Coolant Thermostat Seal

ACDelco
Brand:ACDelco
Part Number: 12S3
UPC: 00707773062562
Weight: 1 lbs
Condition:New



Availability:
0 in Stock
 OUT OF STOCK

Product Information

Description:

Get the ACDelco 12S3 Engine Coolant Thermostat Seal for your vehicle. Buy now and secure your purchase online!

ACDelco Professional Engine Coolant Thermostat Seals help seal between your vehicle's thermostat housing and engine, and are a high quality replacement for many vehicles on the road today. These engine coolant thermostat seals are manufactured to meet your expectations for fit, form, and function. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

  • Manufactured to meet expectations for fit, form, and function
  • Professional, premium aftermarket replacement
  • Provides the performance and dependability you expect from ACDelco

Specifications:

Inside Diameter:
1.567 in.
Inside Diameter:
39.8 mm
Material:
Rubber
Outside Diameter:
1.803 in.
Outside Diameter:
45.8 mm
Programming Required:
No
Seal Type:
Gasket O Ring
Thickness:
0.242 in.
Thickness:
6.14 mm

Features and Benefits:

  • – Inspect seal for signs of wear or damage
  • – Position seal correctly to prevent leakage

Specifications:

Country of Origin:
IL

Select a vehicle to narrow ACDelco 12S3 Engine Coolant Thermostat Seal fitment info!

Last Updated: 12/20/2023

Years Vehicle Per Vehicle Fit NotesFitment Notes

1993

 

1992

 

1991

 

1990

 

1989

 

1993

 

1992

 

1991

 

1990

 

1989

 
Buick Century

3.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Century



3.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1988

 

1987

 

1986

 

1988

 

1987

 

1986

 
Buick Century

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Century



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1990

 

1989

 

1988

 

1987

 

1986

 

1990

 

1989

 

1988

 

1987

 

1986

 
Buick Electra

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Electra



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1989

 

1988

 

1989

 

1988

 
Buick Electra

5.0L V8 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Electra



5.0L V8 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2009

 

2008

 

2007

 

2006

 

2005

 

2009

 

2008

 

2007

 

2006

 

2005

 
Buick LaCrosse

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick LaCrosse



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

1990

 

1989

 

1988

 

1987

 

1986

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

1990

 

1989

 

1988

 

1987

 

1986

 
Buick LeSabre

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick LeSabre



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2008

 

2007

 

2006

 

2008

 

2007

 

2006

 
Buick Lucerne

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Lucerne



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 
Buick Park Avenue

3.8L V6 Gas OHV,
3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Buick Park Avenue



3.8L V6 Gas OHV,
3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

1991

 

1990

 

1989

 

1988

 

1991

 

1990

 

1989

 

1988

 
Buick Reatta

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Reatta



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 
Buick Regal

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Buick Regal



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

1990

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

1991

 

1990

 
Buick Regal

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Regal



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1987

 

1986

 

1987

 

1986

 
Buick Regal

3.8L V6 Gas OHV Turbo
1
 
Professional
Includes Single Pack
8th VIN Digit: 7
 

Buick Regal



3.8L V6 Gas OHV Turbo Professional
Includes Single Pack
8th VIN Digit: 7

1 Per Vehicle

1999

 

1998

 

1997

 

1996

 

1995

 

1999

 

1998

 

1997

 

1996

 

1995

 
Buick Riviera

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Buick Riviera



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

1997

 

1996

 

1995

 

1997

 

1996

 

1995

 
Buick Riviera

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Riviera



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1993

 

1992

 

1991

 

1993

 

1992

 

1991

 
Buick Riviera

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Riviera



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1987

 

1986

 

1987

 

1986

 
Buick Riviera

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Riviera



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1993

 

1992

 

1991

 

1990

 

1989

 

1993

 

1992

 

1991

 

1990

 

1989

 
Buick Skylark

3.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Skylark



3.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1988

 

1987

 

1986

 

1988

 

1987

 

1986

 
Buick Skylark

3.0L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Skylark



3.0L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1987

 

1986

 

1987

 

1986

 
Buick Somerset

3.0L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Somerset



3.0L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1985

 

1985

 
Buick Somerset Regal

3.0L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Buick Somerset Regal



3.0L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1995

 

1995

 
Chevrolet Astro

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Astro



4.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1994

 

1993

 

1992

 

1994

 

1993

 

1992

 
Chevrolet Astro

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

Chevrolet Astro



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1995

 

1995

 
Chevrolet Blazer

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Blazer



4.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 
Chevrolet Camaro

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Camaro



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2005

 

2004

 
Chevrolet Impala

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Chevrolet Impala



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 
Chevrolet Impala

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Impala



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1999

 

1998

 

1999

 

1998

 
Chevrolet Lumina

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Lumina



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1995

 

1994

 

1993

 

1992

 

1995

 

1994

 

1993

 

1992

 
Chevrolet Lumina APV

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Lumina APV



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2005

 

2004

 
Chevrolet Monte Carlo

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Chevrolet Monte Carlo



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 
Chevrolet Monte Carlo

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Chevrolet Monte Carlo



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1981

 

1980

 

1981

 

1980

 
Chevrolet Monte Carlo

3.8L V6 Gas OHV Turbo
1
 
Professional
Includes Single Pack
8th VIN Digit: 3
 

Chevrolet Monte Carlo



3.8L V6 Gas OHV Turbo Professional
Includes Single Pack
8th VIN Digit: 3

1 Per Vehicle

1995

 

1994

 

1995

 

1994

 
Chevrolet S10

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

Chevrolet S10



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1994

 

1993

 

1992

 

1994

 

1993

 

1992

 
Chevrolet S10 Blazer

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

Chevrolet S10 Blazer



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1995

 

1995

 
GMC Jimmy

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

GMC Jimmy



4.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1994

 

1993

 

1992

 

1994

 

1993

 

1992

 
GMC Jimmy

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

GMC Jimmy



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1995

 

1995

 
GMC Safari

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

GMC Safari



4.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1994

 

1993

 

1992

 

1994

 

1993

 

1992

 
GMC Safari

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

GMC Safari



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1994

 

1993

 

1992

 

1994

 

1993

 

1992

 
GMC Sonoma

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

GMC Sonoma



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1999

 

1998

 

1997

 

1996

 

1999

 

1998

 

1997

 

1996

 
Oldsmobile 88

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile 88



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1995

 

1995

 
Oldsmobile 88

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
8th VIN Digit: 1
 

Oldsmobile 88



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack
8th VIN Digit: 1

1 Per Vehicle

1993

 

1992

 

1993

 

1992

 
Oldsmobile 88

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile 88



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1996

 

1996

 
Oldsmobile 98

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile 98



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1995

 

1995

 
Oldsmobile 98

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: K
 

Oldsmobile 98



3.8L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: K

1 Per Vehicle

1994

 

1993

 

1992

 

1994

 

1993

 

1992

 
Oldsmobile 98

3.8L V6 Gas OHV,
3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Oldsmobile 98



3.8L V6 Gas OHV,
3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

1994

 

1993

 

1994

 

1993

 
Oldsmobile Bravada

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile Bravada



4.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1992

 

1992

 
Oldsmobile Bravada

4.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: W
 

Oldsmobile Bravada



4.3L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: W

1 Per Vehicle

1991

 

1991

 
Oldsmobile Delta 88

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile Delta 88



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1988

 

1988

 
Oldsmobile Delta 88

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: 3
 

Oldsmobile Delta 88



3.8L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: 3

1 Per Vehicle

1999

 

1998

 

1999

 

1998

 
Oldsmobile Intrigue

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile Intrigue



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1999

 

1998

 

1997

 

1996

 

1999

 

1998

 

1997

 

1996

 
Oldsmobile LSS

3.8L V6 Gas OHV,
3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Oldsmobile LSS



3.8L V6 Gas OHV,
3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

1998

 

1997

 

1998

 

1997

 
Oldsmobile Regency

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile Regency



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1995

 

1994

 

1993

 

1992

 

1995

 

1994

 

1993

 

1992

 
Oldsmobile Silhouette

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Oldsmobile Silhouette



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1987

 

1986

 

1987

 

1986

 
Oldsmobile Toronado

3.8L V6 Gas OHV
1
 
Professional
w/ 2 bolt housing
Includes Single Pack
 

Oldsmobile Toronado



3.8L V6 Gas OHV Professional
w/ 2 bolt housing
Includes Single Pack

1 Per Vehicle

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 
Pontiac Bonneville

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Pontiac Bonneville



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

1994

 

1993

 

1992

 
Pontiac Bonneville

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Pontiac Bonneville



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

1988

 

1988

 
Pontiac Bonneville

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
8th VIN Digit: 3
 

Pontiac Bonneville



3.8L V6 Gas OHV Professional
Includes Single Pack
8th VIN Digit: 3

1 Per Vehicle

1987

 

1987

 
Pontiac Bonneville

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Pontiac Bonneville



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

1996

 

1995

 
Pontiac Firebird

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Pontiac Firebird



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1989

 

1989

 
Pontiac Firebird

3.8L V6 Gas OHV Turbo
1
 
Professional
Includes Single Pack
 

Pontiac Firebird



3.8L V6 Gas OHV Turbo Professional
Includes Single Pack

1 Per Vehicle

1993

 

1992

 

1993

 

1992

 
Pontiac Grand Am

3.3L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Pontiac Grand Am



3.3L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

2008

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 
Pontiac Grand Prix

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Pontiac Grand Prix



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 

2007

 

2006

 

2005

 

2004

 

2003

 

2002

 

2001

 

2000

 

1999

 

1998

 

1997

 
Pontiac Grand Prix

3.8L V6 Gas OHV Supercharged
1
 
Professional
Includes Single Pack
 

Pontiac Grand Prix



3.8L V6 Gas OHV Supercharged Professional
Includes Single Pack

1 Per Vehicle

1995

 

1994

 

1993

 

1992

 

1995

 

1994

 

1993

 

1992

 
Pontiac Trans Sport

3.8L V6 Gas OHV
1
 
Professional
Includes Single Pack
 

Pontiac Trans Sport



3.8L V6 Gas OHV Professional
Includes Single Pack

1 Per Vehicle

1991

 

1990

 

1991

 

1990

 
Subaru Justy

1.2L L3 Gas SOHC
1
 
Professional
Includes Single Pack
Fuel Sys: CARB
 

Subaru Justy



1.2L L3 Gas SOHC Professional
Includes Single Pack
Fuel Sys: CARB

1 Per Vehicle

1989

 

1988

 

1987

 

1989

 

1988

 

1987

 
Subaru Justy

1.2L L3 Gas SOHC
1
 
Professional
Includes Single Pack
 

Subaru Justy



1.2L L3 Gas SOHC Professional
Includes Single Pack

1 Per Vehicle


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