Removal Procedure
Notice: Handle the electronic throttle control components carefully. Use cleanliness
in order to prevent damage. Do not drop the electronic throttle control components.
Do not roughly handle the electronic throttle control components. Do
not immerse the electronic throttle control components in cleaning solvents
of any type.
Important:
• | DO NOT for any reason, insert a screwdriver or other small hand tools
into the throttle body to hold open the throttle plate, as the wedge inside the
throttle body could be damaged. |
• | An 8-digit part identification number is stamped on the throttle body
casting. Refer to this number if servicing, or part replacement is required. |
- Partially drain the cooling system in order
to allow the hose at the throttle body to be removed. Refer to
Cooling System Draining and Filling
in Engine Cooling.
- Remove the air cleaner outlet duct. Refer to
Air Cleaner Resonator Outlet Duct Replacement
.
- Remove the engine sight shield. Refer to
Upper Intake Manifold Sight Shield Replacement
in Engine Mechanical - 4.8L, 5.3L,
and 6.0L.
- Disconnect the throttle actuator motor electrical connector (2).
- Reposition the coolant air bleed hose clamp
at the throttle body.
- Remove the coolant air bleed hose from the throttle body.
- Remove the throttle body nuts.
- Remove the throttle body.
- Remove and discard the throttle body gasket
(1).
Installation Procedure
- Install the NEW throttle body gasket (1).
- Install the throttle body.
Notice: Use the correct fastener in the correct location. Replacement fasteners
must be the correct part number for that application. Fasteners requiring
replacement or fasteners requiring the use of thread locking compound or sealant
are identified in the service procedure. Do not use paints, lubricants, or
corrosion inhibitors on fasteners or fastener joint surfaces unless specified.
These coatings affect fastener torque and joint clamping force and may damage
the fastener. Use the correct tightening sequence and specifications when
installing fasteners in order to avoid damage to parts and systems.
- Install the throttle body nuts.
Tighten
Tighten the nuts to 10 N·m (89 lb in).
- Install the coolant air bleed hose to the
throttle body.
- Position the coolant air bleed hose clamp at the throttle body.
Important: Verify that the throttle actuator motor harness
connector and the connector seal are properly installed and not damaged.
- Connect the throttle actuator motor electrical connector (2).
- Install the engine sight shield. Refer to
Upper Intake Manifold Sight Shield Replacement
in Engine Mechanical - 4.8L, 5.3L,
and 6.0L.
- Install the air cleaner outlet duct. Refer to
Air Cleaner Resonator Outlet Duct Replacement
.
- Refill the cooling system. Refer to
Cooling System Draining and Filling
in Engine Cooling.
- Connect a scan tool in order to test for proper throttle-opening and
throttle-closing range.
- Operate the accelerator pedal and monitor the throttle angles. The accelerator
pedal should operate freely, without binding, between a closed throttle, and a wide
open throttle (WOT).
- Verify that the vehicle meets the following conditions:
• | The vehicle is not in a reduced engine power mode. |
- Start the engine.
- Inspect for coolant leaks.