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It's -5.... My Duramax won't start...how long should I leave it plugged in for?

8.8K views 70 replies 52 participants last post by  06FXSTBI  
They don't even sell vehicles with block heaters where I'm from. We got in a used engine the other day. You could tell from the corrosion and the block heater that it wasn't from a local yard. Oreillys also sells a universal oil heater, I believe. It goes in the dipstick tube, IIRC. It's a long, flexible rod that plugs in and heats up.