L59 fuel question

[osaltyone]

So I picked up my motor last weekend... It is a L59 from an 06 Tahoe. The guy at the salvage yard said it did not have the FlexFuel option, but the fuel rail has 2 lines. Is this normal? Do I run the 2nd line as a return if I am not doing FlexFuel?

Also there is a nylon tube with a quick disconnect on it. What is that used for?

Thinking I should pick up a book on the swap. Any recomendations?







Is there any way to get the # off the motor and track it back to a VIN? Just want to be sure I got the motor they gave me the VIN for. Verify mileage and all...