P0461 on GMC
Fuel Level Sensor 'A' Circuit Range/Performance
P0461 on GMC vehicles indicates fuel level sensor 'a' circuit range/performance. Au7o has documented this code across 2 GMC models — most commonly on Sierra 1500, Sierra 3500HD. P0461 means the powertrain control module sees a fuel-level sensor signal that is implausible or doesn't change as expected — for instance, the reading stays fixed while fuel is consumed, or it moves erratically. The fuel level sensor (sending unit) in the tank reports how much fuel remains, and this data is also used by the EVAP system for certain leak monitors. Typically this only causes an inaccurate fuel gauge or skipped emissions tests rather than drivability problems. It is a low-urgency issue but worth fixing for an accurate gauge. Typical repair costs on GMC range from $250 to $1,100, depending on the specific model and root cause.
Common Causes of P0461
- •Faulty fuel level sensor / sending unit in the tank
- •Worn or dirty sending-unit resistor card or float
- •Wiring or connector problems to the sending unit
- •Corrosion at the fuel pump module connector
- •Stuck or damaged float arm
- •Poor ground for the sensor circuit
- •Instrument cluster or PCM fault (less common)
P0461 on GMC by Model
GMC Sierra 1500(1 issue)
- Fuel Level Sensor Failure Causing Erratic or Inoperative Gas Gauge2003-2007
A very common GMT800 complaint is sulfur contamination and wear of the fuel level sensor contacts inside the tank module, causing the gauge to read empty, full, or fluctuate unpredictably. Owners often see a low-fuel warning with plenty of fuel in the tank or watch the gauge drop suddenly while driving. GM issued service information and special coverage on many trucks for this exact condition.
GMC Sierra 3500HD(1 issue)
- Fuel Tank Strap and Fuel Sender Unit Corrosion Causing Fuel Gauge Inaccuracy2007-2014
On 2007–2014 Sierra 3500HD models, the fuel tank mounting straps and the fuel level sender unit are prone to corrosion, causing inaccurate fuel gauge readings and in some cases complete sender failure. NHTSA complaint data documents numerous owners reporting sudden fuel gauge drops to empty or erratic readings unrelated to actual fuel level. The plastic float arm on the sender can also crack, exacerbating the problem.
Looking for P0461 on a different make?
View P0461 across all makes →Frequently Asked Questions
What does P0461 mean on GMC?▼
P0461 stands for "Fuel Level Sensor 'A' Circuit Range/Performance." P0461 means the powertrain control module sees a fuel-level sensor signal that is implausible or doesn't change as expected — for instance, the reading stays fixed while fuel is consumed, or it moves erratically. The fuel level sensor (sending unit) in the tank reports how much fuel remains, and this data is also used by the EVAP system for certain leak monitors. Typically this only causes an inaccurate fuel gauge or skipped emissions tests rather than drivability problems. It is a low-urgency issue but worth fixing for an accurate gauge. On GMC specifically, this code is documented across 2 models.
What causes P0461 on GMC vehicles?▼
Common causes on GMC: Faulty fuel level sensor / sending unit in the tank, Worn or dirty sending-unit resistor card or float, Wiring or connector problems to the sending unit, Corrosion at the fuel pump module connector, Stuck or damaged float arm. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0461 on a GMC?▼
Repair costs on GMC range from $250 to $1,100, depending on the specific model and root cause.
Which GMC models have P0461 documented?▼
Au7o has documented P0461 on 2 GMC models: Sierra 1500, Sierra 3500HD.