Question about 2000 GMC Jimmy

2 Answers

Have a fuel leak from top of tank when refeuling

$5 is a good amount of fuel any more runs out on the ground

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  • 82 Answers

Where is it leaking from - front or rear of the tank?
There is a vent pipe near the front of the tank that broke and leaved on my Jimmy.

Posted on Apr 26, 2016

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  • GMC Master
  • 3,641 Answers

Did you check your fill tube, is this a hose or pipe? Also, check your evap system. When the problem is ongoing, can you get under the vehicle to visually see the leak.

Is there a vent hose you can check? Does 5 dollars fill it up?

Posted on Nov 21, 2014

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Posted on Jan 02, 2017

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3 Answers

Finding fuel leak options with very little fuel in tank, leaks with addition of $5 worth of fuel?


Surely you can see the fuel on the outside of the
fuel tank or a rusted fuel tube under it

You should be able to find that issue in 10 minutes
IF you get under it

That is only 2 gallons added at a time

Wouldn't you think the fuel tank is the issue,if
it leaks without the motor running

Now you also know we can not guess from here

Nov 21, 2014 | 2000 GMC Jimmy

1 Answer

Having trouble with my fuel sensor it's says I have 19 gallons but I run out of gas


Yeah, that's a little off. Next time you'll know when it says you have 20 gallons left to go right to a gas station.
How big of a tank do you have? I didn't even know there are sensors that measure gallons. That speaks volumes about my expertise- expert tease. But I only answered to advise you to give some specifics about your rig, make and year, for a better chance at a good answer.

The fuel level sending units to gas gauges on cars and light trucks work like this: a low voltage signal of about 5 volts is fed through the gauge on the dash and then to the sending unit in the tank, where the float arm connected to the unit varies the resistance to ground by its position in the tank. As the float moves up and/or down it mechanically increases or decreases the amount of resistance to ground that the sending unit has built into it. The 5 volt signal goes through this variable resistor and then to ground, either right there or through a ground wire back out of the tank and to a common ground point. The needle on the gauge precisely registers that resistance...well, pretty close, that is. The temperature gauge works in a similar fashion. But that is in a nutshell how the fuel gauge circuit works. Don't know about yours, Don, sorry to say. Good luck with it.

Nov 02, 2014 | Cars & Trucks

1 Answer

2002 Buick Rendevouz leaking fuel after changing fuel pump


check and see if there is still a leak when you are not putting gas in it if it is still leaking, lower the tank and check all the hose connection for leaks. replace hose and clamps turn key to run but not start with tank lowered look for leaks

Apr 23, 2013 | 2002 Buick Rendezvous

1 Answer

P0453 evap emission control system pressure PRVS sensor high


i would make sure that all the connections at the fuel tank pressure sensor are good also check for bent lines that may be restricting fuel , even the return line and vapor return line.
these trucks do have a lot of wiring problems for the fuel tank pump. check the ground for the pump, it goes to frame. if you need to add another ground wire and splice it in.

If the truck was running good before the tank drop then double check everything . also you may have a bad sensor. with your scan tool you could , if the scan tool can. test sensor by add air to tank,make sure to clip the vent line and check readings when adding air to tank and then release the air and watch the readings if they do not go up and down then replace the sensor.

Mar 03, 2013 | 1998 Chevrolet Blazer

1 Answer

Codes are po456 and po463


Hi there:
DTC P0456 - Evaporative Emissions System - Small leak detected
The Powertrain Control Module (PCM) at different times performs various tests on the EVAP system. OBD II Enhanced EVAP systems are in place to keep fuel tank vapors from venting into the atmosphere, and instead purges them into the engine to be burned. Regular pressure tests are conducted by the PCM to monitor the sealed system for leaks. The PCM monitors the EVAP system pressure by watching the fuel tank pressure (FTP) sensor. When the sensor indicates a small leak in the EVAP system, this code is set.

Potential Symptoms: there will likely be no noticeable symptoms other than the Malfunction Indicator Lamp (MIL). This is because the EVAP system is a closed system and only controls fuel tank vapors, not engine management.

Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:
- A small leak in any of the EVAP hoses or fuel tank hoses
- A small leak in the purge valve or vent valve
- The EVAP Canister may be leaking


About possible solutions, first, using a scan tool activate the vent solenoid, sealing the system. Then monitor the fuel tank pressure (FTP) sensor. If the system is sealing properly, the number will stay consistent. If is isn't, the pressure sensor will show that as well. If the system slowly leaks, use a smoke machine and watch for smoke exiting the system at any EVAP component. Any where there is smoke exiting the system, that is the faulty component. Do not pressurize the EVAP system with air pressure. Doing so can damage the purge and vent solenoids in the system.



DTC P0463 - Fuel Level Sensor Circuit High Input
The fuel level sensor (sender) is located in the fuel tank usually integral to the fuel pump module. Usually they cannot be replaced without replacing the fuel pump module, though there are exceptions. There is a float attached to an arm that travels along a resistor which is grounded to the tank, frame or has a dedicated ground circuit. Voltage is supplied to the sender and the ground path changes according to fuel level. How much voltage depends on the system but 5 volts isn't uncommon.


As the fuel level changes, the float moves the arm and changes the resistance to ground which varies the voltage signal. This signal may travel to a fuel pump computer module or directly to the instrument cluster module. Depending on the system, the fuel pump computer module may only monitor the resistance to ground and then relay the fuel level information to the instrument panel. If the fuel level signal to the fuel pump module (or instrument cluster module or PCM (powertrain control module)) goes above 5 volts for a specific amount of time, then the module that is monitoring the fuel level circuit will record this fault code.


Symptoms of a P0463 DTC may include:
Mil (Malfunction indicator lamp) illumination
Fuel level gauge may fluctuate abnormally or read empty or full
Fuel light may illuminate and sound alarm

Potential causes of a P0463 code include:
The signal circuit to the fuel sender is open or shorted to B+ (Battery voltage)
The ground circuit is open, or ground path may have high resistance due to rust or missing ground ******** fuel tank
Damage to the fuel tank could cause problem in fuel level circuit
There's an open in the fuel lever sensor's resistor to ground
Possibly faulty instrument cluster
Less likely is the possibility that the PCM, BCM, or Fuel pump computer module has failed


Now, about the possible solutions, keep in mind that fuel pump senders normally last the life of the fuel pump. So if you have this code present, do a visual inspection of the fuel tank and wiring harness. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Repair as needed. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. If not, repair the open or short in the wiring.


Doing a voltage drop test on the ground circuit can determine if there is a high resistance path in the ground circuit. You can perform this by using a voltmeter and connecting one lead to the battery ground post and the other to the fuel level sensor ground at the tank. Turn the key on (preferably the engine should be running). Ideally it should be 100 millivolts or less (.1 volts). Anything close to 1 volt indicates a current problem or a developing problem. Repair/clean the fuel level sensor ground as needed. It's not impossible that the instrument cluster has failed internally or on the printed circuit board (if applicable). These are very difficult for the layman to test. But if you have access to a wiring diagram you may be able to remove the cluster and see the damaged circuit if it's located on the printed circuit board, but otherwise you'll need a scan tool that will communicate with the instrument cluster.


A simple way to test the fuel level circuit is to provide a good ground to the fuel level sensor at the fuel tank connector. With the key on the fuel gauge should go to one extreme or the other. Removing the ground path completely should cause the gauge to do the opposite. If the gauge responds, you know the wiring that supplies voltage and ground to the fuel level sensor is good and that the instrument cluster is likely okay. The likely suspect would be the fuel level sensor itself. The fuel tank may need removal to gain access to the fuel pump module in the tank. A PCM or BCM (Body control module) failure isn't impossible but highly unlikely. Don't suspect this first.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 04, 2012 | Cars & Trucks

1 Answer

What does PO442, PO462 codes mean


P0442 - Evaporative Emission Control System Leak Detected (small leak)
This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

A code P0442 most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
A small leak/hole in a fuel vapor hose/tube
Other small leak in EVAP system
Faulty vent o-ring seal

Possible Solutions: with a P0442, the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, or
Inspect the EVAP system for cuts/holes in tubes/hoses



P0463 - Fuel Level Sensor Circuit High Input
The fuel level sensor (sender) is located in the fuel tank usually integral to the fuel pump module. Usually they cannot be replaced without replacing the fuel pump module, though there are exceptions. There is a float attached to an arm that travels along a resistor which is grounded to the tank, frame or has a dedicated ground circuit. Voltage is supplied to the sender and the ground path changes according to fuel level. How much voltage depends on the system but 5 volts isn't uncommon.

As the fuel level changes, the float moves the arm and changes the resistance to ground which varies the voltage signal. This signal may travel to a fuel pump computer module or directly to the instrument cluster module. Depending on the system, the fuel pump computer module may only monitor the resistance to ground and then relay the fuel level information to the instrument panel. If the fuel level signal to the fuel pump module (or instrument cluster module or PCM (powertrain control module)) goes above 5 volts for a specific amount of time, then the module that is monitoring the fuel level circuit will record this fault code.

Symptoms of a P0463 DTC may include:
Mil (Malfunction indicator lamp) illumination
Fuel level gauge may fluctuate abnormally or read empty or full
Fuel light may illuminate and sound alarm

Potential causes of a P0463 code include:
The signal circuit to the fuel sender is open or shorted to B+ (Battery voltage)
The ground circuit is open, or ground path may have high resistance due to rust or missing ground ******** fuel tank
Damage to the fuel tank could cause problem in fuel level circuit
There's an open in the fuel lever sensor's resistor to ground
Possibly faulty instrument cluster
Less likely is the possibility that the PCM, BCM, or Fuel pump computer module has failed

Possible Solutions:
Fuel pump senders normally last the life of the fuel pump. So if you have this code present, do a visual inspection of the fuel tank and wiring harness. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Repair as needed. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. If not, repair the open or short in the wiring.

Doing a voltage drop test on the ground circuit can determine if there is a high resistance path in the ground circuit. You can perform this by using a voltmeter and connecting one lead to the battery ground post and the other to the fuel level sensor ground at the tank. Turn the key on (preferably the engine should be running). Ideally it should be 100 millivolts or less (.1 volts). Anything close to 1 volt indicates a current problem or a developing problem. Repair/clean the fuel level sensor ground as needed. It's not impossible that the instrument cluster has failed internally or on the printed circuit board (if applicable). These are very difficult for the layman to test. But if you have access to a wiring diagram you may be able to remove the cluster and see the damaged circuit if it's located on the printed circuit board, but otherwise you'll need a scan tool that will communicate with the instrument cluster.

A simple way to test the fuel level circuit is to provide a good ground to the fuel level sensor at the fuel tank connector. With the key on the fuel gauge should go to one extreme or the other. Removing the ground path completely should cause the gauge to do the opposite. If the gauge responds, you know the wiring that supplies voltage and ground to the fuel level sensor is good and that the instrument cluster is likely okay. The likely suspect would be the fuel level sensor itself. The fuel tank may need removal to gain access to the fuel pump module in the tank. A PCM or BCM (Body control module) failure isn't impossible but highly unlikely. Don't suspect this first.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jan 26, 2012 | 2002 Cadillac Seville

1 Answer

Where is the fuel filter located in a chrysler voyager 2000


The fuel filter is mounted on top of the fuel tank. The fuel tubes are permanently attached to the filter.
  1. Relieve the fuel system pressure.
  2. Disconnect the battery ground cable.
  3. Raise and safely support the vehicle.
  4. Disconnect the fuel tubes from the fuel pump module and chassis fuel line.
  5. Remove the filter mounting bolt.
  6. Remove the filter.
To Install:
  1. Install the fuel filter on the tank.
  2. Apply a small amount of clean engine oil to the nipples of the fuel filter tubes.
  3. Connect the fuel filter tubes to the fuel pump and chassis fuel line.
  4. Lower the vehicle.
  5. Connect the negative battery cable.
  6. Pressurize the fuel system and check for leaks.

Feb 19, 2011 | 2003 Chrysler Voyager

2 Answers

My fuel gage recently started to behave in a weird way. It can drop rapidly like in 2 seconds to a position below the Empty mark regards of the fuel amount in the tank. Sometimes it just shoots up back to...


look for broken/loose wires/connections around the tank while someone else is observing the fuel gauge. a broken/loose ground could be at fault. the fuel sending unit sends the signal to the gauge, also, look for broken/loose wires/connections from the fuel tank to the fuel gauge if you haven't found the problem yet. if all else fais, ground the body with a temporary connection to see if that is good, body ground is needed to keep them running good.

Jan 21, 2011 | 2004 Mercedes-Benz C-Class

1 Answer

Fuel leaks on ground when I fill tank of a 1994 ford escort. Also fuel smell after I drive.


If fuel is leaking on the ground after filling the tank, then the tank should be removed to find a hole in it, it maybe at the top, also check all the fuel lines at the tank. Hope this helps, let me know.

Oct 12, 2009 | 1994 Ford Escort

3 Answers

Gas leaking from tank


This sounds like you have a leak at the fuel pump and sender unit, either in the unit mount or in a fuel line. Check under your back seat for an access panel if you have one then remove it and look at the pump and sender mount to see what is leaking, you may have to start the engine to get it to leak as it may only leak under pressure, hope this helps, let me know

Sep 12, 2009 | 1993 Ford Escort 4 Door

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