Cadillac CTS STS 2008-2011 3.6L V6 Auxiliary Water Pump 25808860 251-721

Product Overview

This Cadillac CTS STS 2008-2011 3.6L V6 Auxiliary Water Pump is an electric replacement component designed to maintain secondary coolant circulation. The auxiliary water pump ensures consistent temperature regulation for the heating system and engine components after shutdown. This auxiliary water pump is an essential part for Cadillac owners needing to restore cooling efficiency and prevent overheating.

Key Features & Performance

• Precision-engineered for a direct fit and easy installation
• Electric motor provides consistent coolant flow independent of engine speed
• Durable housing materials resist thermal stress and vibrations
• Thoroughly tested to ensure leak-free performance and long service life

Fitment & Compatibility

• 2008-2009 Cadillac CTS 3.6L V6
• 2008-2011 Cadillac STS 3.6L V6

Common Uses

• Replacing a leaking or noisy factory auxiliary pump
• Restoring proper cabin heater performance during idle
• Maintaining coolant circulation after the engine is turned off

Technical Specifications

• Part Number(s): 25808860, 251-721, 251721
• Voltage: 12V
• Engine: 3.6L V6
• Drive Type: Electric

Frequently Asked Questions

Q: What does an auxiliary water pump do? A: It is an electric pump that circulates coolant to the heater core and engine to maintain temperatures when the primary mechanical pump is at low RPM or off.

Q: What are the signs of a failing auxiliary pump? A: Common symptoms include reduced heater performance at stoplights, unusual humming noises from the engine bay, or visible coolant leaks near the pump housing.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.