Question about 2001 Chevrolet Impala
The vehicle appears to have had a police vehicle package on it at one point. Some extra wiring here and there and brackets in the engine compartment. The gas gauge has not worked correctly during any of this time. It will usually read full once the car is running most all the time. It will occasionally fall between 1/4 and 1/2 tank mark when the assumed level of fuel is in that range. The gauge will usually go back to the full mark at times before refueling. I have had the vehicle for about 6 months.
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Posted on Jan 02, 2017
You need to check the fuel pressure to the TBI. I just fought one which was doing the same thing. I pulled the fuel tank to replace the fuel pump. It turned out to be the short hose from the fuel pump to the steel line coming out of the tank. It had a split in it so I wasn't getting enough fuel pressure. Some places show two pumps available. One you can pull the unit and replace just the pump. The other the pump and sender are all one unit. Hopefully you have the first one. The second is around $300.
The easiest way to get to the top of the tank is to pull the front 6 bolts mounting the bed and loosen the back two. Take the three screws from the filler neck and unhook the rear axle vent tube. You can then take an engine hoist and lift the front of the box. You can get right to the pump and gauge assemble in the top of the tank. Most times, this works easier than emptying the fuel tank and removing it.
Posted on Dec 18, 2008
SOURCE: fuel gauge
khooper, in another forum, told me that "Chevron Techron Fuel System Treatment Plus can remove harmful sulfur deposits from the sending unit and a filmer agent that can prevent the deposition of said sulfur"
My 05 Trailblazer LT 2WD.
Erratic readings, and when the fuel level was below 1/2 full, the needle would sit on "Empty" with the amber light staying on.
So I went to a dealer, they replaced the fuel level sensor (p/n 19177712 SEN KIT 3.107 $118.62) with labor $270.00 for a total of $398.86 this appears to have fixed it for now.
I also talked to another mechanic who blames ethanol for these deposits !
Posted on May 22, 2009
The level sensor is bad. They are easy to do. You don't have to pull the fuel tank down. There is an acsess hole in the trunk. Look in the rear of the trunk at the rear of the seats. You will notice there is a spot in the middle that the capet comes together, Pull them apart and there is metal plate with some 10mm nuts, pull that off and your fuel pump is there, remove and replace the sensor.
Also there will the a code in the pcm. you will need to clear it to pass emissions
Posted on Jun 19, 2009
Fairly common problem with GM vehicles. The sending unit in your tank has a small circuit board that an arm is attached to which moves up and down according to your fuel level. This circuit board and arm are not making good contact. Unfortunately the only good solution is to replace this part.
Posted on Oct 28, 2009
Testimonial: "thought probably that was it but better off replacing whole unit .i was for for gauge proplem thanks. "
This is a common problem with Malibu's. It is due to cheap metal in the fuel gage that corrodes. Chevrolet knows about this but they refuse to issue a fix. The check engine light staying on and the faulty fuel gage are related. This is a defect and they need to recall this part! Raise hell with the dealership!
Posted on Feb 04, 2010
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