My engine is overheating does this mean I need to replace my radiator?

GM Genuine Parts Engine Radiator

About this product

ACDelco GM Original Equipment Radiators are GM-recommended replacements for your vehicles original components. Radiators are heat exchangers, typically located in the front of the vehicle where air can flow through the fins and dissipate heat. Modern radiators are made from aluminum and plastic, while older vehicles used copper and brass. These radiators are designed to be corrosion resistant with optimal heat transfer characteristics. These original equipment radiators have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

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

Lightweight; the radiators have a positive heat transfer to weight ratio
Corrosion-resistant aluminum designed core helps optimize the radiators long lasting
GM-recommended replacement part for your GM vehicle's original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

Outlet Header Length19.69 in / 500 mm

Inlet Header Length19.69 in / 500 mm

Inlet Header Width3.58 in / 91 mm

Core Height15.14 in / 384.45 mm

Radiator Cap IncludedNo

Tank MaterialPlastic

Outlet LocationBottom Right

Internal Engine Oil CoolerNo

Transmission Oil Cooler IncludedNo

Frame IncludedYes

Down Flow Or Cross Flow TypeCross Flow

Engine Oil Cooler IncludedNo

Internal Transmission Oil CoolerNo

Inlet Diameter1.34 in / 34 mm

Outlet Diameter1.34 in / 34 mm

ClassificationOE

Core Thickness0.79 in / 20 mm

Core Width26.77 in / 680 mm

Core Row Quantity1

Mounting TypePin

Core MaterialAluminum

Mounting Hardware IncludedNo

Outlet Header Width4.25 in / 108 mm

Outlet Header Length19.69 in / 500 mm

Inlet Header Width3.58 in / 91 mm

Radiator Cap IncludedNo

Outlet LocationBottom Right

Transmission Oil Cooler IncludedNo

Down Flow Or Cross Flow TypeCross Flow

Internal Transmission Oil CoolerNo

Outlet Diameter1.34 in / 34 mm

Core Thickness0.79 in / 20 mm

Core Row Quantity1

Core MaterialAluminum

Outlet Header Width4.25 in / 108 mm

Inlet Header Length19.69 in / 500 mm

Core Height15.14 in / 384.45 mm

Tank MaterialPlastic

Internal Engine Oil CoolerNo

Frame IncludedYes

Engine Oil Cooler IncludedNo

Inlet Diameter1.34 in / 34 mm

ClassificationOE

Core Width26.77 in / 680 mm

Mounting TypePin

Mounting Hardware IncludedNo

Limited Lifetime Warranty for Parts (plus Labor if installed by a GM dealer)

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

Maintain proper coolant levels and check levels regularly. Also make sure to check coolants concentration because the water ratio can affect the freezing or boiling point. (Note: Never attempt to remove a surge or radiator cap while the engine is hot. Serious injury could result.)

Replace coolant with a mixture of antifreeze and water according to the owner's manual recommendations.
Evaluate radiator and radiator cap for leaks, corrosion, or worn cap gasket. Make sure to pressure test the cap.
Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating.
Periodically, remove bugs, leaves, and other debris from the front of the radiator. They can block airflow and substantially reduce cooling efficiency.

Model	Body Style	Trim	Year(s)
Trailblazer		LS, LT, L	2021, 2022, 2023, 2024, 2025, 2026

About this product

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

Lightweight; the radiators have a positive heat transfer to weight ratio
Corrosion-resistant aluminum designed core helps optimize the radiators long lasting
GM-recommended replacement part for your GM vehicle's original factory component
Offering the quality, reliability, and durability of GM OE
Manufactured to GM OE specification for fit, form, and function

Outlet Header Length19.69 in / 500 mm

Inlet Header Length19.69 in / 500 mm

Inlet Header Width3.58 in / 91 mm

Core Height15.14 in / 384.45 mm

Radiator Cap IncludedNo

Tank MaterialPlastic

Outlet LocationBottom Right

Internal Engine Oil CoolerNo

Transmission Oil Cooler IncludedNo

Frame IncludedYes

Down Flow Or Cross Flow TypeCross Flow

Engine Oil Cooler IncludedNo

Internal Transmission Oil CoolerNo

Inlet Diameter1.34 in / 34 mm

Outlet Diameter1.34 in / 34 mm

ClassificationOE

Core Thickness0.79 in / 20 mm

Core Width26.77 in / 680 mm

Core Row Quantity1

Mounting TypePin

Core MaterialAluminum

Mounting Hardware IncludedNo

Outlet Header Width4.25 in / 108 mm

Outlet Header Length19.69 in / 500 mm

Inlet Header Width3.58 in / 91 mm

Radiator Cap IncludedNo

Outlet LocationBottom Right

Transmission Oil Cooler IncludedNo

Down Flow Or Cross Flow TypeCross Flow

Internal Transmission Oil CoolerNo

Outlet Diameter1.34 in / 34 mm

Core Thickness0.79 in / 20 mm

Core Row Quantity1

Core MaterialAluminum

Outlet Header Width4.25 in / 108 mm

Inlet Header Length19.69 in / 500 mm

Core Height15.14 in / 384.45 mm

Tank MaterialPlastic

Internal Engine Oil CoolerNo

Frame IncludedYes

Engine Oil Cooler IncludedNo

Inlet Diameter1.34 in / 34 mm

ClassificationOE

Core Width26.77 in / 680 mm

Mounting TypePin

Mounting Hardware IncludedNo

Limited Lifetime Warranty for Parts (plus Labor if installed by a GM dealer)

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

Maintain proper coolant levels and check levels regularly. Also make sure to check coolants concentration because the water ratio can affect the freezing or boiling point. (Note: Never attempt to remove a surge or radiator cap while the engine is hot. Serious injury could result.)

Replace coolant with a mixture of antifreeze and water according to the owner's manual recommendations.
Evaluate radiator and radiator cap for leaks, corrosion, or worn cap gasket. Make sure to pressure test the cap.
Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating.
Periodically, remove bugs, leaves, and other debris from the front of the radiator. They can block airflow and substantially reduce cooling efficiency.

Model	Body Style	Trim	Year(s)
Trailblazer		LS, LT, L	2021, 2022, 2023, 2024, 2025, 2026

Frequently Asked Questions

No, an overheating engine could mean an issue with your radiator, but there are other pieces of the cooling system that could cause the engine to overheat. It is important to check for coolant leaks or a malfunctioning fan. If you look at the radiator and there is a lot of corrosion or holes there may be a problem with the radiator. Either way it is important to get the whole cooling system checked when your engine overheats.

About this product

Product details

Specifications

Warranty

Maintenance

Maintain proper coolant levels and check levels regularly. Also make sure to check coolants concentration because the water ratio can affect the freezing or boiling point. (Note: Never attempt to remove a surge or radiator cap while the engine is hot. Serious injury could result.)

Fits these vehicles

About this product

Product details

Specifications

Warranty

Maintenance

Maintain proper coolant levels and check levels regularly. Also make sure to check coolants concentration because the water ratio can affect the freezing or boiling point. (Note: Never attempt to remove a surge or radiator cap while the engine is hot. Serious injury could result.)

Fits these vehicles

Frequently Asked Questions