3.0 Duramax Oil Change, LM2, Sierra, Silverado 

Oil change specs for a 3.0L Duramax Diesel LM2 engine include:
- Oil type: 0W-20, Dexos D, Mobile 1 $27.97, 5 qts X 2 (Walmart)
- Oil quantity: 7 quarts with filter
- Oil filter, AC Delco PF66, $7.97 (Walmart)
- Oil drain plug torque: 18 ft/lbs
Fumoto F107N Drain Valve, $37.49 (Amazon)
-Funnel. OEM Tools GM Funnel, $25.49 (Amazon)
-Oil Filter wrench for next time, $12.99 (Amazon)
Total Cost: 1st time
Oil: $27.97 X2, Filter: $7.97, Oil Filter Wrench: $12.99, Oil Drain Valve: $37.49, Funnell: $25.49
Total : 139.88
Oil X2 and filter only, this leaves 3 qts for next oil change as well
Total: $63.91
Tools:
15mm wrench / socket for oil drain plug, 18 ft/lbs
19mm wrench to tighten drain valve
Oil filter wrench
Drain pan
funnel