GM 12681185 Water Pump Kit

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To remove the water pump, start by disconnecting the cable from the negative battery terminal and removing the engine cover(s). Then, raise the vehicle and support it securely on jackstands. Drain the cooling system and remove the drivebelts, air filter housing, and air intake duel/resonator. On non-supercharged models, remove the drivebelt tensioner and idler pulley, while on supercharged models, remove the supercharger belt tensioner and bracket. Disconnect and remove the hoses from the water pump, and if necessary, remove the water pump pulley. Finally, unbolt and remove the water pump from the front of the engine. To install the new water pump, remove any old gaskets and compare them to the new ones for accuracy. Apply a thin film of RTV sealant to hold the new gasket in place, and coat O-rings with clean coolant. Install the water pump bolts and tighten them to the specified torque. The remaining steps are the reverse of removal, including refilling the cooling system and operating the engine to check for leaks.