Dorman 47157 Coolant Hose Junction Compatible with Select

Dorman 47157 is an aluminum coolant hose junction designed to replace failed plastic connectors on select Cadillac, Chevrolet and GMC models, allowing you to repair only the damaged connector instead of replacing the entire hose assembly.

Older factory plastic coolant hose junctions can crack, warp or fail over time from heat cycling and vibration. The Dorman OE FIX 47157 replaces the fragile plastic piece with a stronger aluminum junction and includes hose clamps so you can complete the repair without buying a whole new hose assembly. That saves money, reduces waste and restores a secure coolant connection to your engine’s cooling system.

How does this aluminum junction differ from the original plastic connector?

The Dorman 47157 uses corrosion-resistant aluminum in place of the stock plastic, which improves durability under high-temperature and pressure conditions. Aluminum resists the cracking and deformation that often cause plastic junctions to fail, and the part is machined to match factory dimensions for a reliable fit.

• Constructed from aluminum for enhanced temperature resistance
• Precision-machined to align with OEM mounting and hose diameters
• Includes clamps to replicate a complete connector installation

Will this part fit my Cadillac, Chevrolet or GMC vehicle?

Dorman provides this junction to fit specific makes, models and years — it’s essential to confirm compatibility before purchasing. Use your vehicle’s exact make, model and trim information in the fitment tool (for example, Amazon Garage) or compare the original connector shape and hose diameters to ensure a match.

• Check vehicle year, model and engine options for fit confirmation
• Compare hose tube diameters and mounting points to the existing part
• Includes clamps sized to match the connector for a secure seal

What tools and steps are needed to replace only the connector?

Replacing the junction is a straightforward repair for anyone comfortable with basic automotive maintenance. You’ll typically drain some coolant, remove the failed connector, slide hoses onto the new junction, tighten supplied clamps, and refill and bleed the cooling system as needed.

• Basic hand tools: pliers, screwdrivers, ratchet and sockets
• Coolant catch pan and new coolant or topping fluid for refill
• Torque or snug clamps per instructions and pressure-test for leaks

How does this part save money compared to replacing the full hose assembly?

Often the only failing item is the small plastic connector; replacing the entire factory hose assembly can be costly. By fitting an aluminum OE FIX junction, you address the single-point failure at a fraction of the cost while restoring long-term reliability.

• Avoids the higher price of complete OEM hose assemblies
• Supplies clamps so you don’t need extra parts for the repair
• Durable metal construction reduces the chance of repeat failure

Who is this for? The Dorman 47157 coolant hose junction is ideal for DIY mechanics, independent shops and vehicle owners looking to repair a failed coolant connector on compatible Cadillac, Chevrolet or GMC models. If your vehicle’s original plastic junction has split, leaked or become brittle, this aluminum OE FIX offers a durable, cost-effective replacement that restores a secure coolant connection without the expense of a complete hose assembly.