Performance Water Pump Kit for GMC Yukon (2001-2006) 4.8L 5.3L

Heavy-Duty Water Pump and Accessory Drive Kit for 2001-2006 GMC Yukon (GMT800)

What it Does: The Performance Water Pump Kit replaces degraded cooling and accessory drive components on the 2001-2006 GMC Yukon to prevent coolant leaks, bearing failure, and belt slip under sustained engine load.

The Stock GMC Yukon Bearing and Seal Failure Points

Factory cooling systems on high-mileage GMT800 platforms suffer from internal mechanical shaft seal degradation, weeping bearings, and embrittled factory gaskets. Over thousands of thermal cycles, the factory water pump impeller shaft develops axial play, causing coolant cavitation, weep-hole discharge, and localized cylinder head hot spots. Simultaneously, stock mechanical belt tensioners lose internal damping force, leading to severe serpentine belt deflection and premature accessory drive slip across the Vortec 4.8L (LR4) and 5.3L (LM7) engine platforms.

The Engineering Solution

This complete service assembly restores closed-loop thermal regulation and belt drive stability. Built with a high-flow cast aluminum housing and a precision-balanced impeller, the pump optimizes coolant velocity across radiator passages during heavy towing. The kit integrates an OEM-spec thermostat assembly, heavy-duty steel tensioner with calibrated spring tension, and wear-resistant EPDM drive belts. Upgraded mounting gaskets and O-rings eliminate interface weeping to resolve chronic leakage associated with factory numbers 12580162 and 12609719.

Technical Specifications

Compatibility

• 2001-2006 GMC Yukon (Base, SLE, SLT) 4.8L Vortec V8 (LR4)
• 2001-2006 GMC Yukon (SLE, SLT) 5.3L Vortec V8 (LM7, L59)

Frequently Asked Questions

Does this fit the GMT800 Yukon?

Yes, this is a direct fit for the 2001-2006 GMC Yukon equipped with the LR4 4.8L and LM7/L59 5.3L Vortec V8 engines.

Does this kit include the required replacement thermostat?

Yes, the water pump assembly comes pre-fitted with a direct-replacement thermostat and housing to ensure complete coolant temperature control out of the box.

The GMC Towing Standard

Designed to maintain critical engine thermal limits under gross vehicle weight ratings, this cooling kit ensures dependable accessory drive performance and steady coolant flow across demanding hauling cycles.