Wish I could give you an honest answer but too long ago to remember other than the lift pump turned out to be fine & that I had some difficulty powering the lift pump via the red lead .Hmm, you have me curious :idea:
Did you clean up your ground connection like i did underneath your rear bumper on the drivers side?
was it as simple as that and your LP and whole situation was fixed?
(so far for me, i did clean that ground and the other grounds up on the intake manifold, but still had my same bad situation the past 2 weeks of bucking and kicking and not drivable from stahling)
The lift pump ground on my truck is via a short lead from the pump to the frame rail