Silverado 3500 2WD V8-6.6L DSL Turbo VIN 2 (2004)
EN-48974-20 - EGR Cooler Pressure Tester Adapter Set
EN-48974-21 (Qty 1) 12.7 mm (1/2 Inch) EGR Cooler Hose Adapter
EN-48974-22 (Qty 1) 8 mm (5/16 Inch) EGR Cooler Hose Adapter
544259 (Qty 2) 19 mm (3/4 Inch) Hose Clamps
553016 (Qty 1) 12.7 mm (1/2 Inch) Cap Plug
544258 (Qty 3) 15.9 mm (5/8 Inch) Hose Clamps
553015 (Qty 1) 8 mm (5/16 Inch) Cap Plug
553017 (Qty 1) 22.2 mm (7/8 Inch) Cap Plug
Important
If an investigation of loss of engine coolant leads to coolant found in one or multiple cylinders on the right bank, YOU MUST test the EGR
cooler for leakage BEFORE attempting any engine repair. The cylinders affected will depend on which exhaust valves were open at the time of engine
shutdown.
1. Partially drain the engine coolant to allow removal of the EGR cooler coolant hoses. Refer to Cooling System Draining and Filling in SI.
2. Select the appropriate size EGR Cooler Hose Adapter from the EN-48974 - EGR Cooler Pressure Tester Adapter Set.
3. Install the EGR Cooler Hose Adapter (1) and tighten the clamp (2) on the EGR cooler hose barb as shown.
4. Select the appropriate size Cap Plug(s) from the EN-48974 - EGR Cooler Pressure Tester Adapter Set.
5. Install the Cap Plug(s) (1) and tighten the clamp(s) (2) on the EGR cooler hose barb(s) as shown.