Question about 1999 Cadillac DeVille

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My car has the digital system. The gas gauge fluctuates when I know I have gas in it. How do I fix the gauge?

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You have a faulty fuel sender unit Or gage as some would call it.Its in your tank

Posted on Nov 18, 2009

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2 Answers

My 2004 F150s gas gauge fluctuates up and down, why?


Anti slosh module is bad in the instrument panel. Small PC board that pops out. Junk yard only part. Or replace the instrument panel.

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1 Answer

My son has a 2000,4wd,1500 silverado, club cab and the gas gauge fluctuates so can never depend on how much gas is left


May need to replace fuel level sending unit, sometimes it is a seperate purchase amd sometimes you may have get fuel pump module assy, which comes complete

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1 Answer

Why is my gas guage is going up and down in my 1999 caravan?


Could be power fluctuations to the fuel gauge sending unit, a bad sending unit or a bad gauge. The sending unit would be the most likely cause.

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My 95 chevy suburban 5.7 temp. gauge fluctuates from operating temp 195 to 170 back to 195 as I drive


there are two things that can be wrong here.
1-wiring or the sensor itself may be bad.
2-you have a bad head gasket(not blown all the way)but starting to go therefore the fluctuation on the gauge itself.
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1 Answer

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GAS GAGE IS EITHER A BAD SENDING UNIT OR "SLOSH MODULE" IF A FORD. HEAT ISSUE IS A VACUUM LOCK IN THE COOLING SYSTEM AND NOT ALLOWING THE AIR TO ESCAPE AND NO WATER TO CIRCULATE.CHECK FOR LEAKS ,THE THERMOSTAT,AND WATER PUMP FOR PROPER CIRCULATION

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1 Answer

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more than likely the sending unit paty of fuel pump module unit is going bad, unfortunately this is one unit approx $350. you can check your connections at wiring plugs going to it ,but this is pretty common on g.m. vechiles

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1 Answer

My gas gauge on my 1990 bronco always reads empty and i need to know the best way to fix it


take a volt meter and test at the gage to see if the voltage fluctuate when fuel level changes if it does you need to replace the float in the petrol tank.

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2 Answers

1999 Chevy Venture Problems


you have 4 water lines, they are 2 radiator hoses (top and bottom) the bottom one runs from the lower part of the radiator to the water pump, the top radiator hose runs from the upper part of the radiator to the thermostat housing

2 heater hoses, they go from the water pump to the firewall.

if you know which one has a hole then you should take the van to a parts store (if you can safely drive it that far) and show them, they can get the right one for you... and sometimes you can talk someone into putting it on for you.

as for the fluctuating gauges you probably need new sending units for the temp gauge and fuel gauge

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1 Answer

98 bravada gas gauge fluctuates rapidly from E to


sound like a problem with your sending unit inside the gas tank with fuel pump or gauge in dash defective but with GM usually it is the sending unit

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1 Answer

Gas gauge flucuates to empty and full so we never know if we have enough gas. What to do?


It is a common problem. It is a faulty in tank sender. You can just replace the sending unit by removing tank.

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