GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 TopKick C-Series (Crew) C4/C5 🢒 Engine 🢒 Engine Cooling 🢒 Radiator Drain Cock Replacement

Removal Procedure

    Object Number: 339454 Size: SH
  1. Drain cooling system. Refer to Cooling System Draining and Filling .
  2. Insert a ¼ in drive into the drain cock and turn counter clockwise 180 degrees.
  3. Remove the drain cock from the radiator.

Installation Procedure

    Object Number: 339454 Size: SH
  1. Install the drain cock to the radiator.
  2. Insert a ¼ in drive into the drain cock and turn clockwise 180 degrees.
  3. Refill cooling system. Refer to Cooling System Draining and Filling .