Attention: A special non-stick compound is applied to the threads of the oxygen sensor to facilitate the removal procedure. New sensors are shipped pre-applied with compound. When installing a working sensor, the compound must be applied independently. The tightening torque for the oxygen sensor is 42 Nm.
Drawing "A" | Drawing "B" |
Removal and installation
Left semi-block, to the neutralizer (all 5.3L and early 6.0L engines)
1. Raise the vehicle and slide under the safety strut frame
2. Disconnect the cardan shaft from the main gear of the front axle.
3. On vehicles with automatic transmission 4L60-E and 4L70-E, perform the following operations, on vehicles with automatic transmission 6L80-E, go to step 7.
4. Remove the harness connector holder.
5. Disconnect the connector (2) oxygen sensor.
6. Remove clip (1) attaching the sensor connector to the fuel line.
7. Remove holder (2) wire harness connector.
8. Release the engine wiring harness from the clip (1) fuel line support.
9. Disconnect connector (3) oxygen sensor.
10. Remove oxygen sensor (1) or (2), see fig. "A".
11. Installation is carried out in the reverse order.
Right semi-block, to the neutralizer (all 5.3L and early 6.0L engines)
1. Raise the vehicle and slide the safety struts under the frame.
2. Remove the holder (2) wire harness connector.
3. Disconnect the connector (7) oxygen sensor from connector (1) engine wire harness.
4. Detach the clip (8) oxygen sensor from the engine wiring harness.
5. Remove oxygen sensor (3), see picture. "A" higher.
6. Installation is carried out in the reverse order.
5.3 L engine, late models | 5.3 L engine, early models |
6.0 L engine, early models
Left semi-block, to the neutralizer (late 6.0 and 6.2 liter engines)
1. Raise the vehicle and slide the safety struts under the frame.
2. Disconnect the cardan shaft from the main gear of the front axle.
3. Remove the holder (2) wire harness connector.
4. Disconnect the connector (3) oxygen sensor.
5. Remove oxygen sensor (1), see fig. "B" higher.
6. Install in reverse order.
Left semi-block, after the neutralizer (early model engines)
1. Raise the vehicle and slide the safety struts under the frame.
2. Disconnect the connector retainer.
3. Disconnect the connector (2) oxygen sensor.
4. Remove the sensor.
5. Installation is carried out in the reverse order.
Engine 5.3 l | Engine 6.0 l |
Left semi-block, after the neutralizer (later models)
1. Raise the vehicle and slide the safety struts under the frame.
2. Remove the holder (1) wire harness connector.
3. Disconnect the connector (3) oxygen sensor.
4. Remove oxygen sensor (5) or (4), see fig. "A" And "B" respectively.
5. Installation is carried out in the reverse order.
Right semi-block, before and after the converter (late 6.0 and 6.2 liter engines)
1. Raise the vehicle and slide the safety struts under the frame.
2. Remove the holder (5) or (3) wire harness connector.
3. Disconnect the connector (1) or (2) oxygen sensor.
4. Remove oxygen sensor (2) or (3), see fig. "B".
Right half-block, after the neutralizer (5.3L and early 6.0L engines)
1. Raise the vehicle and slide the safety struts under the frame.
2. Remove the holder (5) wire harness connector.
5.3 L engine, late models. | Early 5.3L engine |
Early 6.0L engine
3. Disconnect the connector (4) engine wire bundle from connector (3).
4. Release the oxygen sensor connector from the clip (6).
5. Remove oxygen sensor (4), see fig. "A".
6. Installation is carried out in the reverse order.