The block heater is located on the front passenger side of the engine compartment. It may be taped to the harness near the passenger side battery.
The drain plug for the engine oil on a duramax should be on the back of the oil pan at the very bottom.
If it is cold outside then yes it is best to plug it in to make for an easier start and less stress on the engine.
62 Lb-Ft
There isn't one. Pull the lower hose.
Duramax
It come standard with the duramax. The Allison is strong enough to handle the duramax
Polyacrylic acid (Duramax D-3021)
The 2006 Duramax has 360 HP.
if it is diesel a duramax diesel if its gas it will be a duramax
Every year of the 6.6L Duramax came with the Allison.
Yes, all duramax's have glow plugs.
GM.COM has pictures of the DURAMAX in most applications.