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Re: gas gauge stopped working
This is an Issue with G.M late model cars and P.U.
Take the 2 screws loose that hold the plexiglas cover reach in with hand or wire and pull the Gas Gauge pointer to mid range;
There is another option drill small hole thru the glass cover and use a wire to position Pointer;
The Gas Gauge is fed by a Circut Board; no wires
I did a 99 olds Alero,time 30 min - cost 0;
The Auto Forms is a Good place to troubleshoot , and ask questions;
There are a lot of People giving
Answers that don"t have a clue
what a Mechanic is; There are 3 that I will listen to;When someone gives You Advise,check it out;If You take car to a Dealer
they will find some item that will require 200 Dollars;One question is Your Gas gauge Pegged out and locked at full range;?
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Fuel gauges normally work off a float inside the tank, it may be that the float got jammed when the tank was over filled, as you drive it may free its self with the normal vibration of travel. Keep an eye on the distance you have gone and refill tank before you run out, but do not fill to top of tank this time.
please keep me posted as well, ALL my gauges are doing the same. First the gas, filled it one day and it fell all the way and light turned on, then my themostat, freaked me out, thought i was overheating,...NO just the guage, NOW my spedometer is stuck on 120, and my RPM's are acting crazy. i have read tons with this same problem, WHY WONT the manufacturer DO SOMTHING??
Fuel level sensor is in the gas tank, may be faulty or just dirty, make sure to fill the tank entirely full with premium unleaded, ad a high quality fuel system cleaner / de-gunker, this may clean the sensor enough to feed back to the gauge. It could also be the fuel gauge itself, but that is less likely. Mercedes will be happier with at least 1/4 tank of fuel at all times, and don't skimp on low octane gas!
As for the check engine light, you may have a bad gas cap... believe it or not a gas cap that doesn't seal properly will throw the check engine light. If you get the codes read (for free) at an Autozone or similar parts store it will likely read "evap system" as the problem, which will likely end up being the gas cap.
Take your car to a service center that does a true "flush and fill" of your a/c system. Those little canisters will just waste your money, and they never truly clean and re-lubricate the system like a flush and fill will do.
No, the gauge is mechanical, there is a plunger in youre gas tank that lifts and lowers the gauge based off the amount of fuel in the tank. The gauge might just be loose, you can attempt to take the dashboard off and check but thats a pain, A auto repair can take a look at it for you for cheap.
The float that moves the gas hand is possibly stuck in the tank. If there's isn't an access hole in the rear of the vehicle you'll have to drop the tank. Unless it becomes free on it's own. Hope this is helpful. Please rate. Thanks