gauges still reading to high

[southdakota85chevy]

still having an ongoing problem with my coolant, gas, and oil pressure gauges all reading about a quarter to high, had truck into the shop and they said all gauges and sending units tested out within specs, and the printed circuit looks fine, basically i paid 100 bucks for them to tell me all they can think to do is put a reducer on each gauge to bring them down within spec, but to me it seems there has to be one common source thats causing all the problems, i hav no idea, ive checked everything i can think of!

[VileZambonie]

Elaborate. Do you have the correct cluster and the correct sending units? How do you know the gas gauge reads too high? Have you tried swapping in another cluster?

[southdakota85chevy]

should b correct sending units because nothing was changed out and it used to work fine, and well, i know the gas gauge is off because it ran out at a 1/4 tank, ..twice, the only thing ive changed somewhat recently was the battery, haven't tried a new cluster, wondering if mabey the printed circuit could be bad even though it looks ok

[VileZambonie]

You've got some unwanted resistance somewhere.