GMB 158-2020 Engine Water Pump

Engine Water Pump for OE-Style Cooling Service

This GMB engine water pump is built to meet or exceed OEM specifications for dependable cooling system service. It is a direct-fit replacement for select Saturn, Cadillac, and Saab applications, including Saturn L300, Cadillac CTS, and Saab 9-5 models.

Key Features

• GMB Part Number 158-2020
• OEM Standard item grade for OE-style replacement fit and function
• Aluminum construction for durable cooling system performance
• Gaskets included for installation
• New condition
• Manufactured to meet or exceed OEM specifications
• Compatible with applications such as 1999-2003 Saab 9-5, 2003-2004 Cadillac CTS, and 2001-2005 Saturn L300

Detailed Description

The GMB 158-2020 engine water pump is an OEM Standard replacement built for vehicles that require reliable coolant circulation and consistent engine temperature control. Its aluminum housing supports long-term cooling system service, while the included rubber gasket helps provide a proper seal during replacement. This part is a practical choice for drivers servicing a Saab 9-5 water pump, Cadillac CTS cooling repair, or Saturn L300 cooling system maintenance.

This part cross-references Airtex AW5079 and Dayco 71300 for the same application. The GMB 158-2020 also aligns with other listed interchange numbers for select OE-style fitment.

What It Helps Address

• Coolant leaks from a worn or failing water pump
• Overheating caused by reduced coolant circulation
• Noisy pump operation from internal wear
• Cooling system service on high-mileage Saturn, Cadillac, and Saab vehicles
• Replacement of a damaged or corroded pump housing

Installation Notes and Tips

• Verify engine application before installation, especially on 1999-2003 Saab 9-5 and 1997-2001 Cadillac Catera models marked as Primary Pump.
• Inspect the mating surface, coolant passages, and adjacent cooling components before installing the new pump.
• Use the included gasket and follow the vehicle service procedure for proper sealing.
• Refill and bleed the cooling system according to manufacturer specifications after installation.

Quality Assurance

GMB manufactures this water pump to meet or exceed OEM specifications, with OEM Standard grading for replacement confidence. The aluminum construction and included gasket support a service-ready cooling system repair for select Saturn, Cadillac, and Saab applications.