Gas gauge on dash says it is low on fuel when full

Tiny
RAFFIEARL
  • MEMBER
  • 2004 GMC CANYON
  • 5.3L
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 112,000 MILES
I live in Manitoba and my truck sat for 60 days without being moved.
ABS light came on and little engine light and low fuel came on.
I knew the battery was toast so replaced it and all warning items on DIC went away. Even the low fuel one went away for about 5 minutes. Then it came back on so figured better get gas went to the gas station and put in approximately 4 us gallons and it was full. Gauge says it is still low on fuel.
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Tuesday, May 19th, 2020 AT 12:51 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

The fuel level sensor on this vehicle is in the fuel tank and part of the pump module. I suspect that since it isn't accurate, the float may be stuck or the rheostat has failed. The only way to be sure is to remove it. I attached a pic of it.

To remove it and inspect. Here are the directions for replacing it. The attached pics correlate with the directions.

____________________________________

2004 GMC Truck Canyon 4WD L4-2.8L VIN 8
Procedures
Vehicle Powertrain Management Sensors and Switches - Powertrain Management Sensors and Switches - Computers and Control Systems Fuel Level Sensor Service and Repair Procedures
PROCEDURES
FUEL LEVEL SENSOR REPLACEMENT

REMOVAL PROCEDURE
1. Remove the fuel tank module.

Pic 2

2. Disconnect the fuel level sensor electrical connector from the module.

Pic 3

3. Complete the following in order to remove the fuel level sensor from the module assembly:
3.1. Disengage the locking tab from the sensor.
3.2. Slide the sensor downward from the module.

INSTALLATION PROCEDURE

pic 4

1. Complete the following in order to install the fuel level sensor to the module assembly:
1.1. Align the edges of the sensor with the slots in the module.
1.2. Slide the sensor into position, ensure the locking tab is fully engaged.

Pic 5

2. Connect the fuel level sensor electrical connector to the module.
3. Install the fuel tank module.

____________________________

What I suggest is to check that. Let me know if you have other questions,

Take care,
Joe
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Tuesday, May 19th, 2020 AT 8:22 PM

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