What is EPDM rubber and why is it used for heater hoses?

EPDM (ethylene propylene diene monomer) rubber is a synthetic rubber known for its excellent resistance to heat, ozone, and weathering. For heater hoses, this means it can withstand the high temperatures of engine coolant and the harsh environment under the hood without degrading quickly.

How do I know if my heater hose needs replacing?

Look for visible signs of wear such as cracks, swelling, or hardening of the rubber. Leaks around the hose connections or a sweet smell of coolant in the cabin can also indicate a problem. If you notice coolant loss or a lack of heat, the heater hoses are a good place to start checking.

Does this heater hose come with new clamps?

This Gates molded heater hose (Part# 19321) is sold individually and does not include new hose clamps. It is recommended to inspect your existing clamps for corrosion or damage and replace them if necessary when installing the new hose.

2005-2009 Buick LaCrosse Heater Hose | Gates 19321

Name: Gates 04-08 Pontiac Grand Prix V-6 3.8L Heater To Eng. (Bottom) Molded Heater Hose
Brand: Gates
SKU: gates-gates-04-08-pontiac-grand-prix-v-6-3-8l-heater-to-eng-bottom-molded-heater-t14-876312
Price: 49.03 USD
Availability: BackOrder

Gates 04-08 Pontiac Grand Prix V-6 3.8L Heater To Eng. (Bottom) Molded Heater Hose

$49.03

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2005-2009 Buick LaCrosse. This Gates molded heater hose connects your heater core to the engine, ensuring cabin warmth.

Key Features

Fits 2005-2009 Buick LaCrosse, 2004-2005 Chevrolet Impala, 2004-2005 Chevrolet Monte Carlo, and 2004-2008 Pontiac Grand Prix.
Constructed from EPDM rubber for good resistance to heat and coolant.
Molded shape ensures a direct fit and prevents kinking.
Carries hot coolant from the heater core to the engine.
Helps maintain proper cabin heating and defrosting function.

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Will it fit your car?

Product Details

This Gates molded heater hose is built with EPDM rubber, a material known for its resistance to heat and coolant chemicals. It's specifically shaped to connect the heater core on your 2005-2009 Buick LaCrosse to the engine block, carrying hot coolant to warm your cabin. Replacing a cracked or leaking heater hose is important to prevent coolant loss and ensure your defroster and heater work properly, especially during colder months.

Gates uses a construction method that ensures the hose maintains its form, preventing kinks or collapses that could restrict coolant flow. This molded design means it fits right into place without needing to be bent or forced, making installation more straightforward. Having the correct shape is key for a secure connection and to avoid stress points that could lead to premature failure.

When you're replacing heater hoses, it's often a good idea to check the condition of the other hoses in your cooling system, as well as the clamps. This hose is designed to be a direct replacement for the original equipment part on your specific vehicle.