Performance Water Pump Kit for GMC Sierra 1500 (2007-2013) 4.8L 5.3L 6.0L 6.2L

Heavy-Duty Performance Water Pump Kit for 2007-2013 GMC Sierra 1500 (GMT900)

What it Does: The Performance Water Pump Kit restores efficient coolant circulation and thermal regulation on the 2007-2013 GMC Sierra 1500 to prevent engine overheating and maintain optimal operating temperatures under severe load.

The Stock GMC Sierra 1500 Cooling Deficiencies

Factory cooling systems on the GMT900 platform face extreme thermal cycling, especially when towing or operating in stop-and-go conditions. The OEM pump bearing assembly degrades over time from drive belt lateral load, compromising the internal mechanical shaft seal. This leads to telltale weep-hole fluid discharge, bearing play, and eventual impeller slippage. Furthermore, aging stamped factory impellers suffer from coolant cavitation at elevated RPMs, causing rapid aeration, localized hot spots in the cylinder heads, and premature thermostat binding that compromises engine longevity.

The Engineering Solution

This replacement pump assembly features a reinforced die-cast aluminum housing paired with a heavy-duty unitized shaft seal and high-load dual-bearing pack designed to withstand prolonged torsional belt loads. A high-efficiency internal impeller optimizes hydraulic volume flow across all four engine displacements, suppressing cavitation across the rev range. Supplied with a precision-calibrated thermostat housing and pre-formed multi-layer gaskets, this kit eliminates dry-seal leaks and interfaces seamlessly with the stock front accessory drive system to maintain exact coolant pressure dynamics.

What's Included

• 1 Engine Water Pump
• 1 Thermostat Housing
• 1 Thermostat
• 2 Rectangular Gaskets
• 1 Oval Gasket
• 2 Mounting Bolts

Technical Specifications

Compatibility

• 2007-2013 GMC Sierra 1500 4.8L V8 (LY2, L20)
• 2007-2013 GMC Sierra 1500 5.3L V8 (LH6, LY5, LMG, LC9)
• 2007-2009 GMC Sierra 1500 6.0L V8 (L76)
• 2009-2013 GMC Sierra 1500 6.2L V8 (L92, L9H, L94)

Frequently Asked Questions & Fitment Warnings

Does this fit the GMT900 Sierra 1500?

Yes, this is a direct fit for the 2007-2013 GMC Sierra 1500 equipped with the Gen IV Vortec 4.8L, 5.3L, 6.0L, or 6.2L engine. It is not compatible with V6 or Duramax diesel models.

Should the cooling system be bled after installation?

Yes, a complete coolant refill and air purge cycle are required after torqueing fasteners to OEM specification to prevent vapor locks around the thermostat sensor.

The GMC Workhorse Caliber

Built to handle heavy payload capacities and severe-duty towing cycles, this replacement water pump assembly ensures your Sierra maintains stable head temperatures under continuous full-throttle strain.