[Double Venom]

Art,
Not sure, but almost positive, the "OHM'S" for the SW vs the GM OHM reading in the tank are NOT the same!

In this case, pull the stock sending unit out, remove the "swing arm" and then reinstall.

Drill the appropriate size hole next to it, following the directions for the swing arm measurement and your all set.

Before you aske, you will need both units as the SW unit does not come with a fuel pick up tube.
DV