HomeAir and Fuel Delivery > SensorsStandard Ignition FFS1 Flex Fuel Sensor
Part #: FFS1

Standard Ignition FFS1 Flex Fuel Sensor

⚙️ 30 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$441.70Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet and GMC, Silverado 1500, Suburban 1500, Tahoe, Sierra 1500, Yukon, Yukon XL 1500, S10, and Sonoma
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Standard Ignition Flex Fuel Sensor FFS1

The Standard Ignition Flex Fuel Sensor FFS1 is designed to provide accurate fuel composition readings for select Chevrolet and GMC vehicles. This sensor ensures optimal engine performance by detecting ethanol content in the fuel mixture, helping your vehicle adjust fuel delivery accordingly.

  • Connector Gender: Female
  • Connector Quantity: 1
  • Connector Type: Plug in
  • Contents: Sensor
  • Terminal Gender: Male
  • Terminal Quantity: 3
  • Terminal Type: Blade

Detailed Product Description

The Standard Ignition FFS1 flex fuel sensor features a female plug-in connector with a single connection point, designed for straightforward installation. It includes three male blade terminals that provide reliable electrical contact and signal transmission. This sensor is engineered to monitor the ethanol content in fuel, allowing compatible Chevrolet and GMC models to adjust fuel injection and ignition timing for efficient combustion. The sensor is compatible with various models including Chevrolet S10, Silverado 1500, Suburban 1500, Tahoe, and GMC Sierra 1500, Sonoma, Yukon, and Yukon XL 1500.

Applications and Common Issues Addressed

  • Helps prevent engine performance issues caused by incorrect fuel mixture detection
  • Reduces risk of poor fuel economy due to inaccurate ethanol content readings
  • Addresses check engine light triggers related to fuel sensor faults
  • Improves drivability by ensuring proper fuel delivery adjustments
  • Supports emissions compliance by maintaining correct fuel mixture ratios

Installation Notes and Tips

When installing the Standard Ignition FFS1 sensor, ensure the female plug-in connector is securely attached to the vehicle’s wiring harness. Verify that the three male blade terminals are free of corrosion and properly seated to maintain electrical integrity. It is recommended to disconnect the battery before installation to avoid electrical shorts. This sensor is designed for direct replacement on compatible Chevrolet and GMC models, requiring no additional modifications.

Quality Assurance and Warranty Information

Standard Ignition manufactures the FFS1 flex fuel sensor to meet or exceed OEM specifications for durability and performance. The sensor undergoes rigorous testing to ensure reliable operation under various driving conditions. Warranty coverage details should be confirmed at the time of purchase, as they may vary by distributor or retailer.

BrandStandard Ignition
Part NumberFFS1
Connector GenderFemale
Connector TypePlug In
ContentsSensor
Terminal GenderMale
Terminal TypeBlade

This part fits 30 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2005ChevroletSilverado 15005.3LV8FLEXN/A
2005ChevroletSuburban 15005.3LV8FLEXN/A
2005ChevroletTahoe5.3LV8FLEXN/A
2005GMCSierra 15005.3LV8FLEXN/A
2005GMCYukon5.3LV8FLEXN/A
2005GMCYukon XL 15005.3LV8FLEXN/A
2004ChevroletSilverado 15005.3LV8FLEXN/A
2004ChevroletSuburban 15005.3LV8FLEXN/A
2004ChevroletTahoe5.3LV8FLEXN/A
2004GMCSierra 15005.3LV8FLEXN/A
2004GMCYukon5.3LV8FLEXN/A
2004GMCYukon XL 15005.3LV8FLEXN/A
2003ChevroletSilverado 15005.3LV8FLEXN/A
2003ChevroletSuburban 15005.3LV8FLEXN/A
2003ChevroletTahoe5.3LV8FLEXN/A
2003GMCSierra 15005.3LV8FLEXN/A
2003GMCYukon5.3LV8FLEXN/A
2003GMCYukon XL 15005.3LV8FLEXN/A
2002ChevroletS102.2LL4FLEXN/A
2002ChevroletSilverado 15005.3LV8FLEXN/A
2002ChevroletSuburban 15005.3LV8N/A
2002ChevroletTahoe5.3LV8FLEXN/A
2002GMCSierra 15005.3LV8FLEXN/A
2002GMCSonoma2.2LL4FLEXN/A
2002GMCYukon5.3LV8FLEXN/A
2002GMCYukon XL 15005.3LV8N/A
2001ChevroletS102.2LL4FLEXN/A
2001GMCSonoma2.2LL4FLEXN/A
2000ChevroletS102.2LL4FLEXN/A
2000GMCSonoma2.2LL4FLEXN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

10371025125702602-900015S629371-359876458FFS1FFSC20000SE1001SV51-72-0171

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.