Engine Block Draining
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Drain the cooling system, refer to the above procedure.
- If equipped with the 4.8L, 5.3L or 6.0L engine, remove the left and right engine block coolant drain plugs
- If equipped with the 8.1L engine, remove the left and right engine block coolant drain plugs.
- Remove the engine block coolant heater, if equipped. Refer to COOLANT HEATER REPLACEMENT (DEALER INSTALLATION - 6.0L ENGINE) or COOLANT HEATER REPLACEMENT (4.8L, 5.3L, AND 6.0L ENGINES) or COOLANT HEATER REPLACEMENT (8.1L ENGINE) .
- Allow the engine block to drain completely.
- Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the drain plugs.NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
- Reinstall the engine block coolant drain plugs.
Tighten
- Tighten the 4.8L, 5.3L or 6.0L engine block coolant drain plug to 60 N.m (44 lb ft).
- Tighten the 8.1L engine block coolant drain plug to 60 N.m (44 lb ft).
Courtesy of GENERAL MOTORS CORP.
- Install the engine block coolant heater, if equipped. Refer to COOLANT HEATER REPLACEMENT (DEALER INSTALLATION - 6.0L ENGINE) or COOLANT HEATER REPLACEMENT (4.8L, 5.3L, AND 6.0L ENGINES) or COOLANT HEATER REPLACEMENT (8.1L ENGINE) .
- Fill the cooling system, refer to the above procedure.