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recharge gauge shows pressure of 70 psi
The gas gauge and thermostat on a 2002 express van are not related. You have two separate problems with the vehicle.
how to install the oil pressure gauge on a Chevy 350 small block
If the gas gauge stops working is there a fuse for it?
1999 Chevy table oil pressure gauge low and check gauges flickering
Check for a fuse in fuse block marked gauges.
the fuse my be blown or ,it needs anew gauge
A bourdon gauge is a type of aneroid gauge. It is used to measure pressure.
check ground first
The check gauge light is on to notify you that one of the gauges is out of normal range. The vehicle may be over heating, low on oil pressure or not charging.
replace oil sensor unit
bad temp sender usually. Bad gauge rarely.