How to replace the fuel level sensor in a 35 Reg/Ext/Crew Cab with a 34-gallon tank on GMC Sierra 3500 Classic?

Substituting the Fuel Level Sensor in the 35 reg/ext/crew cab with its 34-gallon tank requires removing the fuel tank module first. Detach the wiring pigtail of the Fuel Level Sensor electrical connector from its position on the module cover before extracting the wiring pigtail from beneath the clip of the module. The Fuel Level Sensor retainers need gentle pressure to exit the module reservoir before pulling the sensor out of its slot. Position the Fuel Level Sensor over the slot in the reservoir before you slide it down into the slot until the retainers engage the module reservoir. The wiring pigtail should be installed beneath the module clip after fuel pump wires then connect its electrical connector to the module cover prior to reinstalling the fuel tank module.

OEM GMC Sierra 3500 Classic Fuel Level Sensor

Gas Gauge Sensor

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GMC Sierra 3500 Classic Fuel Gauge Sending Unit
Part Number: 88965379
$166.65 MSRP: $342.46
You Save: $175.81 (52%)
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Product Specifications
- Other Name: Sensor Kit, Fuel Tank Meter/Pump; Fuel Level Sensor; Fuel Sending Unit; Level Sensor
- Replaces: 25349028
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS
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GMC Sierra 3500 Classic Fuel Gauge Sending Unit
Part Number: 19148811
$131.90 MSRP: $366.91
You Save: $235.01 (65%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Kit, Fuel Tank Meter/Pump; Fuel Level Sensor; Fuel Sending Unit; Level Sensor; Sending Unit
- Replaces: 25350792
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
View related parts
GMC Sierra 3500 Classic Fuel Gauge Sending Unit
Part Number: 88965383
$146.89 MSRP: $301.86
You Save: $154.97 (52%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor Kit, Fuel Tank Meter/Pump; Fuel Level Sensor; Fuel Sending Unit; Sending Unit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007 GMC Sierra 3500 Classic | SL, SLE, SLT, WT | 8 Cyl 6.0 L GAS, 8 Cyl 8.1 L GAS

GMC Sierra 3500 Classic Fuel Level Sensor

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GMC Sierra 3500 Classic Fuel Level Sensor Parts Questions & Experts Answers

Fuel Gauge Sending Unit
88965379
Q: How to replace the fuel level sensor in a 35 Reg/Ext/Crew Cab with a 34-gallon tank on GMC Sierra 3500 Classic?
A: Substituting the Fuel Level Sensor in the 35 reg/ext/crew cab with its 34-gallon tank requires removing the fuel tank module first. Detach the wiring pigtail of the Fuel Level Sensor electrical connector from its position on the module cover before extracting the wiring pigtail from beneath the clip of the module. The Fuel Level Sensor retainers need gentle pressure to exit the module reservoir before pulling the sensor out of its slot. Position the Fuel Level Sensor over the slot in the reservoir before you slide it down into the slot until the retainers engage the module reservoir. The wiring pigtail should be installed beneath the module clip after fuel pump wires then connect its electrical connector to the module cover prior to reinstalling the fuel tank module.