What is the main function of this upper coolant hose?

This upper coolant hose connects your engine to the radiator. Its main job is to allow coolant to flow from the engine to the radiator to be cooled, and then back to the engine.

Why is it important to replace a molded coolant hose?

Molded hoses are shaped to fit specific routing. If your original hose is cracked, swollen, or leaking, replacing it with a new molded hose ensures proper fitment and prevents coolant loss, which is critical for preventing engine overheating.

Does this hose come with any clamps?

This part is for the hose only. You will need to reuse your existing hose clamps or purchase new ones separately.

Gates 89-91 Chevrolet P Series Van 4-Cyl. 3.9L Diesel Upper Molded Coolant Hose

Specifications

Brand: Gates
Part #: 21729
UPC: 00072053060386

Gates 89-91 Chevrolet P Series Van 4-Cyl. 3.9L Diesel Upper Molded Coolant Hose

Name: Gates 89-91 Chevrolet P Series Van 4-Cyl. 3.9L Diesel Upper Molded Coolant Hose
Brand: Gates
Price: 22.59 USD
Availability: InStock

$22.59

On Backorder

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

Fits 1990-1991 Chevrolet P30. This Gates upper molded coolant hose is built to replace your original hose, ensuring proper coolant flow.

Key Features

Fits 1990-1991 Chevrolet P30 and 1990-1991 GMC P3500 with the 4-Cyl. 3.9L Diesel engine.
Direct replacement for the original upper radiator hose.
Molded construction matches factory specifications for a proper fit.
Helps maintain consistent coolant flow to prevent engine overheating.
Built to withstand the demands of the cooling system.

Secure CheckoutFast Shipping631-982-0042

Fits these vehicles

Chevrolet P30 1990-1991
GMC P3500 1990-1991

Product Details

Gates is a well-known name for reliable engine components, and this upper molded coolant hose is no exception. If you're working on your 1990 or 1991 Chevrolet P30 or GMC P3500 with the 4-Cyl. 3.9L diesel engine, this hose is designed to connect your radiator to the engine, helping to keep your coolant circulating properly.

This hose is molded to match the original equipment's shape, which helps make installation straightforward. It's built to handle the heat and pressure found in your cooling system, so you can be confident it will do its job keeping your engine from overheating. Replacing a worn or cracked hose is important for preventing leaks and ensuring your engine stays at the right temperature.