42495434 GM Heater Core

Review GM Genuine Auxiliary Heater Core

The GM 42495434 heater core is a crucial component of a vehicle's heating system. Designed specifically for select GM models, this heater core is engineered to provide efficient and effective heating to the passenger compartment.

The heater core is a compact radiator that circulates coolant through small tubes, which are then heated by the engine's warm coolant. The heated coolant creates warm air that is distributed throughout the vehicle's cabin via the heater controls.

This GM heater core is made from high-quality materials that ensure durability and longevity. The tubes are made of copper or aluminum, which provide excellent heat transfer properties and resistance to corrosion. The end tanks are constructed from sturdy plastic material, and the core is sealed with a gasket to prevent coolant leaks.

The GM 424495434 heater core is designed to fit seamlessly into the existing heater core location in select GM vehicles. It measures approximately 23.5 inches long, 10 inches wide, and 3 inches high. The inlet and outlet connections are threaded for easy installation and removal, and the core comes with new O-rings to ensure a tight seal.

Installation of the new heater core involves removing the old core, cleaning the area, and installing the new one. It is recommended to use a cooling system flush kit to ensure the new core starts with a clean cooling system. Proper installation is crucial to ensure the heater core functions correctly and lasts as long as possible.

In summary, the GM 42495434 heater core is a high-quality component that provides efficient and effective heating to the passenger compartment of select GM vehicles. It is made from durable materials and is designed for easy installation. If you are experiencing issues with your vehicle's heater, this new heater core may be the solution.

Buying a new GM heater core (part number 42495434) can be a necessary repair for your vehicle's heating system. Here are some pros and cons to consider before making a purchase.

1. Improved Heater Performance: A faulty heater core can lead to poor heating performance or even no heat at all. Replacing the heater core with a new one can restore the heater function in your vehicle, providing you with a more comfortable driving experience.

2. Safety: In extreme temperatures, a malfunctioning heater core can prevent the defrost feature from working properly, making it difficult to clear fog from the windshield. Replacing the heater core can help ensure the defrost function works efficiently, improving safety during harsh weather conditions.

3. Long-Term Savings: While the upfront cost of a new heater core may be significant, it can save you money in the long run by preventing further damage to other components in your heating system.

1. Cost: The cost of a new GM heater core (42495434) can be expensive, ranging from $300 to $700 or more, depending on the vehicle make and model.

2. Installation Complexity: Heater core replacement can be a complex repair that requires specialized knowledge and tools. It may be necessary to drain the cooling system, remove the dashboard, and disconnect various hoses and wires. This complexity can add to the repair cost and time.

3. Labor Costs: The cost of labor for a heater core replacement can also be significant, depending on the shop rate and the amount of time required for the repair.

Replacing a faulty heater core (GM part number 42495434) can improve heating performance, ensure safety during harsh weather conditions, and save money in the long run by preventing further damage to other components. However, the upfront cost and installation complexity can be significant. It is essential to weigh these factors against the potential benefits before deciding to proceed with the repair.

If you are experiencing heating issues and believe the heater core may be the culprit, consider getting a diagnosis from a trusted mechanic or repair shop. They can inspect your vehicle and provide an accurate assessment of the issue and the potential repair costs. If the diagnosis confirms that the heater core needs to be replaced, you can then evaluate the repair quote against the potential benefits and consider your budget and priorities before making a decision.

Details:

Found a better price. Changed my mind. Just didn't like it.

specifications heatercoreco:

• brand: Gm
• mpn: 42495434
• part type: Heater
• genuine oem: Yes
• warranty: 1 Year
• fitment type: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included

seller heatercoreco:

• # reviews: 30926
• rating: 99.0%
• city: garland, texas

payments heatercoreco:

• other
• wallet: google-pay
• credit card: diners-club

general heatercoreco:

• category: Auto Parts > Car Truck Accessories > Air Conditioning Heating > Heater Cores

shipping heatercoreco:

• service: fedex ground / fedex home delivery
• transit: 4-10 days
• carrier: fedex
• type: fixed
• class: standard

offer heatercoreco:

• in stock #: 2
• started: april 13, 2026
• availability: in stock
• sold #: 8
• options: ship-to-home
• prices: $239.66–$241.67
• item condition: New

returns heatercoreco:

• time: 30 days
• paid by: seller
• policy: returns accepted