Gas gauge went crazy and now I have a fuel leak. Not sure from where. The leak looks as if it might be coming from just above the fuel tank but I cant see where. I have been reading a little on here and noticed people having similiar problems with these trucks and seemed to be the fuel sending unit... where can I find that? Is that a probable cause and if not then what could it be? Also from time to time the truck spits and sputters when leaving from a stop.
As far as your sputtering when leaving from a stop, I have found that the bushings in the distrubutor wear out. The rotor will no longer be centered under the cap and it will result in a poor idle and sputtering. The best way is to remove the cap and rotor and check to see if there is a brown rusty colored dust present. If it is, you must replace the distributor and the problem will be corrected.
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THE FUEL LEVEL SENDING UNIT INSIDE THE FUEL TANK IS MOST LIKELY BAD. THE SENDING UNIT IS PART OF THE FUEL PUMP ASSEMBLY. IF YOU DISCONECT THE HARNESS AT FUEL PUMP AND GAUGE GOES TO EMPTY THE UNIT IS BAD
The most common reason is the sending unit inside the gas tank, look under the truck and locate the fuel tank, look for wires going to the tank,the wires will lead to top of the tank, unplug connector and fuel gauge should go to full, if the gauge moves then its the sending unit inside the tank, this would mean the wiring is good and the gauge also works and that leave the sending unit. good day.
Common problem on the 03-06 Trailblazer instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Trailblazer fuel gauge problems
The only way I know of to get the diagram you are looking for is to acquire a "build book". Even dealer service manuals don't have this diagram. I got one from faxonautoliterature for $49 plus shipping. A better bet would be to find a spot on either end of the leak where you can work on it easily and work from there. Hope this helps.
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.
Have a 2001 chev and it does the same thing. It is a common problem. It is a faulty in tank sender, not the fuel pump. You can just replace the sending unit by removing tank. If you want more information please get back to me.
sending unit on the fuel pump in the tank is stuck, and needs to be replaced. its expensive, but that will fix your issue. its the housing around the pump that has the float arm on it. you can try to free the float arm by removing your pump assembly, but cant guarantee its any good after being stuck