Express 4500 V8-6.6L DSL Turbo (2009)
1. Install the vacuum pump to the vehicle.
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
2. Install the vacuum pump retaining bolts and tighten to3 Nm (27 lb in).
3. Connect the vacuum hose to the vacuum pump.
4. Connect the vacuum pump electrical connector.
5. Install the air cleaner. Refer to Air Cleaner Assembly Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance
Checks/Air Cleaner Housing/Service and Repair) for the 4.3L engine, or Air Cleaner Assembly Replacement (See: Engine, Cooling and
Exhaust/Engine/Tune-up and Engine Performance Checks/Air Cleaner Housing/Service and Repair) for the 4.8L, 5.3L, 6.0L, 6.2L and 7.0L
engine, or Air Cleaner Assembly Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Air Cleaner
Housing/Service and Repair) for the 6.6L engine.