Removal & Installation (5.3L)

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The intake manifold, throttle body, fuel injection rail, and fuel injectors may be removed as an assembly. If not servicing the individual components, remove the manifold as a complete assembly.

Remove the electrical wire harness connectors from the throttle body.
Remove the engine coolant air bleed hose and clamp.
Remove the throttle body nuts. See Fig 1.
Remove the throttle body.
Remove the throttle body gasket. See Fig 2.
Discard the gasket.
Remove the throttle body studs, if required. To install, reverse removal procedure.

Fig 1: Removing & Installing Throttle Body (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Removing & Installing Throttle Body (2 Of 2)

Courtesy of GENERAL MOTORS CORP.