A. Replace the Oxygen Sensor Module

1. Open the hood and disconnect the negative battery cables from both batteries.





2. Using a mechanic's creeper, slide under the right side of the truck and locate the oxygen sensor module on the outer side of the right frame rail (Figure 1).

3. Disconnect the electrical connector at the oxygen sensor module (Figure 1).

4. Remove the four oxygen sensor module mounting bolts (Figure 1).

5. Remove and discard the original oxygen sensor module from frame rail.

6. Position the new oxygen sensor module onto the frame rail.

7. Install the four oxygen sensor module mounting bolts.

8. Tighten the oxygen sensor module mounting bolts to 53 in. lbs. (6 N.m).

9. Connect the oxygen sensor module electrical connector to the module.

10. Connect the negative battery cables.

11. Continue with Section B - Check ECM Software Level.