Needle has rotated clockwise and now is in a fixed position right under the empty marker, i have possible leads for example a resistor problem behind the fuel gauge in the insturment panel, or a poor ground connection @ fuel pump.
Common problem on the 03-06 Silverado 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 - Silverado fuel gauge problems
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If the problem is the needle on the gauge is stuck below empty, take a magnet, hold it above the needle and rotate it around the gauge. Most likely counter-clockwise. It should work fine then. No need to take the dash apart.
This is not uncommon. The fuel float is not corresponding to the proper position of the fuel gauge. Simple remember the position (or mark it on the gauge) of the needle when it ran out of fuel and this will be yoyr new empty mark. When I buy a new (new to me) vehicle - I put a canister of fuel in the vehicle and operate it under normal conditions from day to day. When it runs out of fuel I and the reserve fuel and go fill up. This way I know where empty is - no surprises! :)
The problem is usually defective stepper motors.If you are electronic and mechanical minded,
order new stepper motors from ebay.( http://stores.ebay.com/GM-Cluster-Repair )
A set of six replacement motors are around $30.00 and it should take you around 1 hour to complete.I would also recommend getting replacement light bulbs while you have the cluster dis-assembled. After replacing the motors temporarily plug the circuit board back into the wiring harness, with the key in the off position.This will cause all of the stepper motors to find the home or zero position.Re-assemble the cluster being very careful not to rotate the motor while installing the gauge needles.Aligned the needles to the lowest gauge line for all gauges (MPH, RPM, Fuel, Temp, Oil and Voltage).If you have chosen to only fix the one that is broken, (not always a bad motto) you only have to test and calibrate one item. Apply power once more with the key off, before re-assembly of the cluster to verify all of the gauges align to zero.Re-assemble the cluster and the dash.It would be a good idea to verify the speedometer needle has been placed on the stepper motor correctly, by comparing your indicated speed with a GPS.
If you do not know how to properly de-solder, or have a friend who does, I would recommend the cluster repair service ( http://stores.ebay.com/GM-Cluster-Repair ) for repair for $58.00.
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.
If it was the sending unit, it is accessible through the trunk floor. A problem I have with my Park Ave gas gauge is when I get a dead battery and try to start the car, the needles will twitch and it sends my gas gauge needle to the far right side. This causes it to rotate/fall under the proper gauge are and come up under the rest pin on the left side. When that happens, I have to pull my whole instrument cluster and rotate it around so the needle goes back up to the top. Check where you needle is the next time you turn the key to run. If its under the little rest pin at the empty position of the gas gauge, then this should be the fix.
you will need to replace the fuel level sensor.(sending unit) it is in the tank and is hooked to the fuel pump. you can buy seperatly from pump. you may finf it easier to remove the bed if you have some help. it is six or eight bolts and harness unplugs then you can get right to it.