GM Genuine Parts Water Pump Gasket

About this product

GM Genuine Parts Engine Water Pump Gaskets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These gaskets are used between the water pump housing and the engine block or another component to seal the interface between the components. The gasket may be made of fiber or a rubberized composite material that provides a liquid-tight connection. The gasket helps keep the engine coolant in and keeps air out. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

May be made from fiber or a rubberized composite material
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

ClassificationOE

MaterialArmstrong Syntheseal

Thickness0.86 in / 0.033 mm

ClassificationOE

Thickness0.86 in / 0.033 mm

MaterialArmstrong Syntheseal

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

Tips for Water Pump Servicing & Installation:

Clean all excess dirt and debris from the water pump housing.
Run your vehicle to increase engine temperature, and ensure the system is pressurized.
Inspect for leakage at the water pump outlet housing or the rear cover gasket, and leakage at the water pump vent or weep hole.
A stain around the weep hole is acceptable. However, if a weep occurs with the engine running and the coolant system pressurized, then the water pump should be replaced.
Clean and reinstall the coolant recovery reservoir before flushing the cooling system.
Flush the cooling system completely, using power flush equipment or thermal cycling the system with clean water three times. The most effective method of system flushing is to use a coolant exchanger, following the manufacturer's operating instructions.
Do not use any non-approved flush agents and replace the coolant according to manufacturer's specifications.
Clean all sealing surfaces, and make sure all old gasket material is removed before installing your replacement component.
Never strike the water pump shaft, since this will damage the new water pump.
Torque all bolts according to the manufacturer's specifications and adjust belts to proper tension (if applicable) to manufacturer's specifications.
Use sealant tabs only if recommended. Some sealant tabs or similar compounds may restrict coolant flow through the passages of some cooling systems.
With the new pump installed, turn the hub by hand and check for rotation.
After installation, pressure-test the system for leaks and check for sufficient fan blade clearance between the blade and radiator shroud.
Inspect related components in the cooling system, including your fan blades, fan clutch, engine mounts, radiator, belts and hoses, and reservoir.

Signs of wear for engine water pump seals include but are not limited to:

Leaking Coolant - Puddles of coolant under your vehicle, a constant drip or stream of coolant from the water pump's weep hole, or a constantly empty or low coolant reservoir are all signs of potential water pump wear, and may be caused by cracks in the pump, or seal or gasket failures.
Engine Overheating - If your vehicle's engine overheats, it may not be receiving the required coolant flow. Make sure that your vehicle's cooling system contains the proper level of coolant.
Rumbling Noise in the Pump - A rumbling, squeaking, or screeching noise near the front of your vehicle when you start it may indicate a malfunctioning water pump bearing.
Visible Component Wear - Worn seals, corrosion, cavitation/pitting of pump components, or a loose or wobbly pump shaft are all signs of wear that may lead to water pump failure and should be addressed.

Model	Body Style	Year(s)
Astro		1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Blazer		1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
C10		1985, 1986
C1500	Extended Cab Pickup	1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C1500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C20		1985, 1986
C2500		1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
C2500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C3500		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
C3500HD		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Camaro		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992
Caprice		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
Corvette		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
El Camino		1982
Express 1500		1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Express 2500		1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Express 3500		1996, 1997, 1998, 1999, 2000, 2001, 2002
G10		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
G20		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
G30		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Impala		1982, 1983, 1984, 1985
K10		1985, 1986
K1500	Extended Cab Pickup	1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
K1500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
K2500		1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
K2500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
K3500		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Malibu		1982, 1983
Monte Carlo		1983, 1984, 1985, 1986, 1987, 1988
P20		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989
P30		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
R10		1987
R10 Suburban		1987, 1988
R1500 Suburban		1989, 1990, 1991
R20		1987, 1988
R20 Suburban		1987, 1988
R2500 Suburban		1989, 1990, 1991
R30		1987, 1988
R3500		1989, 1990, 1991
S10		1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
S10 Blazer		1988, 1989, 1990, 1991, 1992, 1993, 1994
Silverado 1500		1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Tahoe		1995, 1996, 1997, 1998, 1999, 2000
V10		1987
V10 Suburban		1987, 1988
V1500 Suburban		1989, 1990, 1991
V20		1987
V20 Suburban		1987, 1988
V2500 Suburban		1989, 1990, 1991
V30		1987, 1988
V3500		1989, 1990, 1991

About this product

Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

May be made from fiber or a rubberized composite material
Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
GM regularly updates production and service part designs to integrate new materials and technologies

ClassificationOE

MaterialArmstrong Syntheseal

Thickness0.86 in / 0.033 mm

ClassificationOE

Thickness0.86 in / 0.033 mm

MaterialArmstrong Syntheseal

24 Months/Unlimited Miles Limited Warranty for Parts (plus Labor if installed by a GM dealer)

Please visit our warranty page on Gmparts.com for full warranty details.

Tips for Water Pump Servicing & Installation:

Clean all excess dirt and debris from the water pump housing.
Run your vehicle to increase engine temperature, and ensure the system is pressurized.
Inspect for leakage at the water pump outlet housing or the rear cover gasket, and leakage at the water pump vent or weep hole.
A stain around the weep hole is acceptable. However, if a weep occurs with the engine running and the coolant system pressurized, then the water pump should be replaced.
Clean and reinstall the coolant recovery reservoir before flushing the cooling system.
Flush the cooling system completely, using power flush equipment or thermal cycling the system with clean water three times. The most effective method of system flushing is to use a coolant exchanger, following the manufacturer's operating instructions.
Do not use any non-approved flush agents and replace the coolant according to manufacturer's specifications.
Clean all sealing surfaces, and make sure all old gasket material is removed before installing your replacement component.
Never strike the water pump shaft, since this will damage the new water pump.
Torque all bolts according to the manufacturer's specifications and adjust belts to proper tension (if applicable) to manufacturer's specifications.
Use sealant tabs only if recommended. Some sealant tabs or similar compounds may restrict coolant flow through the passages of some cooling systems.
With the new pump installed, turn the hub by hand and check for rotation.
After installation, pressure-test the system for leaks and check for sufficient fan blade clearance between the blade and radiator shroud.
Inspect related components in the cooling system, including your fan blades, fan clutch, engine mounts, radiator, belts and hoses, and reservoir.

Signs of wear for engine water pump seals include but are not limited to:

Leaking Coolant - Puddles of coolant under your vehicle, a constant drip or stream of coolant from the water pump's weep hole, or a constantly empty or low coolant reservoir are all signs of potential water pump wear, and may be caused by cracks in the pump, or seal or gasket failures.
Engine Overheating - If your vehicle's engine overheats, it may not be receiving the required coolant flow. Make sure that your vehicle's cooling system contains the proper level of coolant.
Rumbling Noise in the Pump - A rumbling, squeaking, or screeching noise near the front of your vehicle when you start it may indicate a malfunctioning water pump bearing.
Visible Component Wear - Worn seals, corrosion, cavitation/pitting of pump components, or a loose or wobbly pump shaft are all signs of wear that may lead to water pump failure and should be addressed.

Model	Body Style	Year(s)
Astro		1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Blazer		1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
C10		1985, 1986
C1500	Extended Cab Pickup	1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C1500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C20		1985, 1986
C2500		1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
C2500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
C3500		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
C3500HD		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Camaro		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992
Caprice		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
Corvette		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
El Camino		1982
Express 1500		1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Express 2500		1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Express 3500		1996, 1997, 1998, 1999, 2000, 2001, 2002
G10		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
G20		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
G30		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Impala		1982, 1983, 1984, 1985
K10		1985, 1986
K1500	Extended Cab Pickup	1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
K1500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
K2500		1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
K2500 Suburban		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
K3500		1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Malibu		1982, 1983
Monte Carlo		1983, 1984, 1985, 1986, 1987, 1988
P20		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989
P30		1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999
R10		1987
R10 Suburban		1987, 1988
R1500 Suburban		1989, 1990, 1991
R20		1987, 1988
R20 Suburban		1987, 1988
R2500 Suburban		1989, 1990, 1991
R30		1987, 1988
R3500		1989, 1990, 1991
S10		1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
S10 Blazer		1988, 1989, 1990, 1991, 1992, 1993, 1994
Silverado 1500		1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Tahoe		1995, 1996, 1997, 1998, 1999, 2000
V10		1987
V10 Suburban		1987, 1988
V1500 Suburban		1989, 1990, 1991
V20		1987
V20 Suburban		1987, 1988
V2500 Suburban		1989, 1990, 1991
V30		1987, 1988
V3500		1989, 1990, 1991

Frequently Asked Questions

Yes. Always consult the Vehicle Owner’s manual or an expert technician before making any repairs or adjustments

Yes. ACDelco GM Original Equipment parts are equivalent to your GM vehicle's original factory components.

No. Water pumps can vary greatly in size and appearance depending on the vehicle they are designed for.

Yes. The water pump is responsible for moving coolant through your vehicle's cooling system, keeping the heat generated by your engine at acceptable levels, and helping prevent overheating. A malfunctioning water pump can cause your engine to overheat, which may result in severe and costly engine damage.

Yes. As part of regular cooling system operation, the water pump sends hot coolant to the heater core of your engine, which transfers heat into the passenger cabin of your vehicle. If this hot coolant is unable to reach the heater core, then this heat transfer cannot occur, and your passenger compartment remains colder than you want.

No. Your vehicle's water pump keeps coolant moving as long as the engine is running and stops when the engine is turned off. If you want to be able to circulate coolant for a short time after the engine has been turned off, an auxiliary electric water pump is needed.

About this product

Product details

Specifications

Warranty

Maintenance

Tips for Water Pump Servicing & Installation:

Signs of wear for engine water pump seals include but are not limited to:

Fits these vehicles

About this product

Product details

Specifications

Warranty

Maintenance

Tips for Water Pump Servicing & Installation:

Signs of wear for engine water pump seals include but are not limited to:

Fits these vehicles

Frequently Asked Questions

Should the Vehicle Owner’s manual or an expert technician be consulted before making any repairs or adjustments?

Will ACDelco GM Original Equipment Water Pumps, Kits and other components match the quality of my GM vehicle's original factory parts?

Do all water pumps look the same?

Can a malfunctioning water pump harm my engine?

Does the water pump affect the temperature inside the passenger compartment of my vehicle?

Does the water pump work when my vehicle is turned off?

GM Genuine Parts Water Pump Gasket

GM Genuine Parts Water Pump Gasket