one more 411 swap post

[TZTuning]

got my 1996 411 pcm swap all but done, got it tuned, everything running happy. only thing im lacking information on is the fuel gauge.

question is, do i need to do anything to the fuel gauge calibrations?

im getting conflicting answers searching the forums, one says leave it alone, the next says change this and that. i cant verify the gauge is working correct now or before. it works but thats all i know for now, havent filled it up with gas.


anyway. one post i read says 1996 fuel sender hooks direct to gauge, the next i read says it uses the pcm to control it. which is it?

ive looked over my lextech pinout and dont see a wire function for fuel sender or gauge.

truck has a 26 gallon tank, the tune file says 30.64 gallons and i have no idea about adjusting the pwm or outputs.

appreciate the help.

[99k2500]

the pcm controls it. best I can tell you is to empty it, fill it to 1/4 tank and read what the gauge says. Then adjust how much fuel is in it until you get the 1/4 tank mark. same as you go up till full. Then I just interpolate in between... Not completely accurate but its pretty close.

[Fast4.7]

The fuel gauge was not wired through the PCM in 96 or 97. Starting in 98 it was. My 97 van has a fuel level buffer module to the left of the column under the dash that the sending unit feeds a signal to which then sends it to the cluster.

[99k2500]

my bad. I did not look at the year.... GM does some strange stuff.