The fuel gauge in my 98 GMC Z-71 is not working properly. After talking
to various people, I decided to replace my fuel pump. When I started it
up, the fuel pump noise was considerably less than before, but the fuel
gauge still "vibrates". It reads the approx. amount of fuel, but it's
not a constant gauge. A few months ago, I decided since the fuel pump
is still under warranty, I would change it again, this time I took the
bed off (instead of dropping the tank) where I found that my ground
wire to the pump did not have clean contact to the frame. I cleaned the
grounding point and thought I solved the problem, but after putting
everything back together, the gauge still shakes. Any advice?