Removal Procedure

WARNING: This page is about a different car, the 2006 Chevrolet Monte Carlo and 2006 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

Drain the cooling system. Refer to Draining and Filling Cooling System (LS4 Static Fill) or Draining and Filling Cooling System (LZE, LZ4, LZ9 Static Fill) or Draining and Filling Cooling System (9C1, 9C3 Static Fill) or Draining and Filling Cooling System (LS4 GE 47716 Fill) or Draining and Filling Cooling System (LZE, LZ4, LZ9, 9C1, 9C3 GE 4771 Fill) .

Fig 1: Drain Cock

Courtesy of GENERAL MOTORS CORP.

Unscrew the radiator drain cock from the radiator.
Remove the drain cock from the radiator side tank with a firm tug.
Remove the drain cock seal from the drain cock.