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IX. HEATED EXHAUST GAS OXYGEN SENSOR
(HEGO)
REMOVAL PROCEDURE
1. Disconnect Negative battery cable.
2. Locate the Oxygen Sensor.
3. Disconnect the Oxygen sensor electrical con-
nector.
HEGO and Fitting
4. Using an Oxygen
Sensor socket, remove the
Oxygen
Sensor.
INSTALLATION PROCEDURE
IMPORTANT
Before installing the Oxygen
sensor lubricate
threads with anti-seize compound GM P/N
5613695 or equivalent. Avoid contaminating sen-
sor tip with compound.
1. Install Oxygen Sensor.
2. Reconnect electrical connector to the Oxygen
Sensor.
3. Reconnect the negative battery cable.
4. Start the vehicle and let run until it reaches
normal operating temperature and is in closed
loop.
5. If a DTC code is found, refer to the Electrical
Section for further diagnosis.
X. THROTTLE BODY AND/OR GASKET
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Remove the air intake.
3. Remove Throttle Body electrical connector.
4. Remove four Screws that secure the Throttle
Body.
5. Remove the Throttle Body and the Gasket.
INSTALLATION PROCEDURE
1. Inspect Throttle Body Gasket. Replace if ne-
cessary.
2. Place Throttle Body and Gasket on the Intake
Manifold plenum, align and secure with four
Screws. Torque to 7-9 ft.lbs. (9.5-12.2 Nm).
3. Connect electrical connector.
4. Reconnect negative battery cable.
5. Start Engine. Verify correct operation in all
throttle ranges.
6. Using the DST, clear DTC information from
the ECM.
7. Turn the ignition OFF and wait 30 seconds.
8. Start the vehicle and let run until it reaches
normal operating temperature.
9. If a DTC code is found, refer to the Electrical
Section for further diagnosis.
XI. REGULATOR
Regulator
REMOVAL PROCEDURE
1. Relieve the LPG fuel system pressure. Refer
to XVIII. LPG FUEL SYSTEM PRESSURE
RELIEF.
2. Disconnect Negative battery cable.
3. Remove the electrical connector on the Shu-
toff Valve.
4. Remove the Fuel Hose from the regulator.
5. Remove the LPG Fuel Line at the flare fitting
attached to the Shutoff Valve.
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