[mr402]

I'm looking for some diagnosis help. The fuel gauge in my 2000 Jimmy reads accurate only when full. When in Park or Neutral the gauge will bounce around. When in gear it stops bouncing but won't read accurately. I'm certain its' input related as the trip computer is also inaccurate and changes with the gauge. I plan to pull the tank this weekend and do some voltage measurements and a few tests at the wiring.

Am I looking at a sending unit or do these have a separate voltage regulator for the fuel gauge. All other gauges are working fine and I only have 53k miles on it. If this were only my 71 it would be a piece of cake.