Sierra 2500 4WD V8-6.0L (2008)
Important: The O-ring seal may be reused if not cut or damaged.
9. Inspect the O-ring seal (421) for cuts or damage, replace as necessary.
10. Lubricate the O-ring seal (421) with clean engine oil.
11. Install the oil level indicator tube (420) to the engine block.
12. Install the oil level indicator tube bolt (419).
Tighten the bolt 25 N.m (18 lb ft).
13. Install the spark plug wires (1) to the spark plugs.
14. Install the spark plug wires to the ignition coils.
15. Inspect the spark plug wires for proper installation.
1. Push sideways on each boot in order to inspect the seating.
2. Reinstall any loose boot.
