Another gas gauge issue

Hey Supertruck,

You said you checked the IVR. The Voltage output should be 5-6 volts. If it is too low, gas gauge will not work. Also, the temp and oil pressure gauge share the 5 -6 volt output from the gas gauge. Try disconnecting the aftermarket gauges from the cluster and see if the gas gauge works. The aftermarket gauges may not work the same as the originals use bi-metallic strip technology to indicate readings. The electronics they use may be interfering with the older technology.
Just a thought , hope it helps!!