Cleaning Procedure

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Manifold Absolute Pressure Sensor

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Do not use the intake manifold-to-cylinder head sealing gaskets again.

Remove the manifold absolute pressure (MAP) sensor (714) from the rear of the intake. The MAP sensor is to be installed upon completion of the cleaning and inspection procedures.
Inspect the sealing grommet on the MAP sensor. The grommet should not be torn or damaged.

Fig 2: View Of Intake Manifold-To-Cylinder Head Gasket

Courtesy of GENERAL MOTORS CORP.

Remove and discard the intake manifold-to-cylinder head gaskets (514).

Fig 3: View Of Fuel Injector Rail

Courtesy of GENERAL MOTORS CORP.

Remove the fuel rail with injectors. Refer to Fuel Rail and Injectors Removal .

Fig 4: View Of Throttle Body & Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the throttle body and gasket. Refer to Throttle Body Removal .

Fig 5: View Of EVAP Purge Solenoid, Bolt & Isolator

Courtesy of GENERAL MOTORS CORP.

Remove the evaporative emissions (EVAP) purge solenoid (708), bolt (710), and isolator (709).
Clean the intake manifold in solvent.
- Clean the intake manifold gasket surfaces.
- Clean the intake manifold internal passages.

CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.

Dry the intake manifold with compressed air.