2007 GMC Sierra 1500 Classic 5.3L V8 FLEX. 2007 GMC Sierra 1500 Classic 5.3L V8 GAS. 2007 GMC Sierra 1500 Classic 6.0L V8 GAS. 2007 GMC Sierra 1500 Classic 4.8L V8 GAS. Notes: Water Pump (Standard). Quality-assured with 100 percent leakage and functional tests of seals, bearings, castings and fully assembled water pump.
