I rewired a 1998 C1500 L31 "Black Box" harness identical to the 2002 Express Van L31 wiring schematic. The stock Express Van tune is a good starting point. I use EFI Live to to tune the '0411.
I rewired a 1998 C1500 L31 "Black Box" harness identical to the 2002 Express Van L31 wiring schematic. The stock Express Van tune is a good starting point. I use EFI Live to to tune the '0411.
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