HomeBelts and Cooling > SensorsStandard Ignition FLS-3 Engine Coolant Level Sensor
Part #: FLS-3

Standard Ignition FLS-3 Engine Coolant Level Sensor

⚙️ 360 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chevrolet, GMC, Oldsmobile, and Pontiac, C1500, C2500, C3500, K1500, K2500, K3500, P30, P3500, Blazer, G20, G30, R1500 Suburban, R2500 Suburban, R3500, V1500 Suburban, V2500 Suburban, V3500, G2500, G3500, Jimmy, P20, R2500, P2500, R10 Suburban, R20, R20 Suburban, R30, V10 Suburban, V20 Suburban, V30, R10, V10, V20, R1500, V1500, V2500, C10, C10 Suburban, C20, C20 Suburban, C30, K10, K10 Suburban, K20, K20 Suburban, K30, K5 Blazer, C1500 Suburban, C2500 Suburban, K1500 Suburban, K2500 Suburban, Monza, Starfire, Sunbird, and Astre
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Reliable Engine Coolant Level Sensor for Chevrolet and GMC Vehicles

The Standard Ignition FLS-3 Engine Coolant Level Sensor is designed to provide accurate monitoring of coolant levels in select Chevrolet, GMC, Oldsmobile, and Pontiac models. This sensor ensures your engine maintains optimal temperature by alerting you to low coolant conditions, helping prevent overheating and potential engine damage.

  • Screw-in attachment method for secure installation
  • Single male connector with screw-in type for reliable electrical connection
  • One male bullet terminal for consistent signal transmission
  • Operates on standard 12-volt electrical systems
  • Compatible with a wide range of Chevrolet and GMC trucks and SUVs

Detailed Product Description and Attributes

The FLS-3 Engine Coolant Level Sensor from Standard Ignition features a screw-in attachment method, ensuring a tight and leak-free fit within the coolant reservoir or tank. It includes one male connector designed with a screw-in type connection, providing a secure and corrosion-resistant electrical interface. The sensor also has a single male bullet terminal, which facilitates straightforward wiring and dependable signal output. Operating at 12 volts, this sensor integrates seamlessly with the electrical systems of various Chevrolet and GMC vehicles, including models such as the Blazer, C10, K5 Blazer, and Suburban variants.

Compatible Vehicles and Applications

This sensor is compatible with multiple Chevrolet, GMC, Oldsmobile, and Pontiac models, particularly trucks and SUVs from the C, K, and R series, including the C1500, K1500, R2500, and their Suburban versions. It is suitable for vehicles requiring a screw-in style engine coolant level sensor with a male connector and bullet terminal configuration. The part number FLS-3 ensures you receive the correct sensor for these specific applications.

Common Issues Addressed by the Engine Coolant Level Sensor

  • Prevents engine overheating by monitoring coolant levels accurately
  • Alerts driver to low coolant conditions to avoid engine damage
  • Helps maintain proper engine temperature for efficient performance
  • Reduces risk of coolant leaks through secure screw-in installation
  • Ensures reliable electrical connection to prevent false warnings

Installation Notes and Tips

Installation of the Standard Ignition FLS-3 sensor requires a compatible screw-in port on the coolant reservoir or tank. Ensure the engine is cool before removal of the old sensor to avoid injury. Use appropriate tools to securely screw in the sensor without over-tightening, which could damage the threads. Connect the male screw-in connector and bullet terminal firmly to maintain a stable electrical connection. Verify proper sensor operation by checking for coolant level warnings on the vehicle’s dashboard after installation.

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The FLS-3 Engine Coolant Level Sensor undergoes rigorous quality control testing to guarantee fit, form, and function. This part is backed by Standard Ignition’s limited warranty, providing coverage against defects in material and workmanship under normal use conditions.

BrandStandard Ignition
Part NumberFLS-3
Attachment MethodScrew-in
Connector GenderMale
Connector TypeScrew-in
Terminal GenderMale
Terminal TypeBullet
Voltage12

This part fits 360 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
1994ChevroletC1500DIESELN/A
1994ChevroletC2500DIESELN/A
1994ChevroletC3500DIESELN/A
1994ChevroletK1500DIESELN/A
1994ChevroletK2500DIESELN/A
1994ChevroletK3500DIESELN/A
1994ChevroletP30DIESELN/A
1993ChevroletC1500DIESELN/A
1993ChevroletC2500DIESELN/A
1993ChevroletC3500DIESELN/A
1993ChevroletK1500DIESELN/A
1993ChevroletK2500DIESELN/A
1993ChevroletK3500DIESELN/A
1993ChevroletP30DIESELN/A
1993GMCC1500DIESELN/A
1993GMCC2500DIESELN/A
1993GMCC3500DIESELN/A
1993GMCK1500DIESELN/A
1993GMCK2500DIESELN/A
1993GMCK3500DIESELN/A
1993GMCP3500DIESELN/A
1992ChevroletC1500DIESELN/A
1992ChevroletC2500DIESELN/A
1992ChevroletC3500DIESELN/A
1992ChevroletK1500DIESELN/A
1992ChevroletK2500DIESELN/A
1992ChevroletK3500DIESELN/A
1992ChevroletP30DIESELN/A
1992GMCC1500DIESELN/A
1992GMCC2500DIESELN/A
1992GMCC3500DIESELN/A
1992GMCK1500DIESELN/A
1992GMCK2500DIESELN/A
1992GMCK3500DIESELN/A
1992GMCP3500DIESELN/A
1991ChevroletBlazer6.2LV8N/A
1991ChevroletC1500DIESELN/A
1991ChevroletC2500DIESELN/A
1991ChevroletC3500DIESELN/A
1991ChevroletG206.2LV8N/A
1991ChevroletG306.2LV8N/A
1991ChevroletK1500DIESELN/A
1991ChevroletK2500DIESELN/A
1991ChevroletK3500DIESELN/A
1991ChevroletP30DIESELN/A
1991ChevroletR1500 Suburban6.2LV8N/A
1991ChevroletR2500 Suburban6.2LV8N/A
1991ChevroletR3500DIESELN/A
1991ChevroletV1500 Suburban6.2LV8N/A
1991ChevroletV2500 Suburban6.2LV8N/A
1991ChevroletV3500DIESELN/A
1991GMCC1500DIESELN/A
1991GMCC2500DIESELN/A
1991GMCC3500DIESELN/A
1991GMCG25006.2LV8N/A
1991GMCG35006.2LV8N/A
1991GMCJimmyDIESELN/A
1991GMCK1500DIESELN/A
1991GMCK2500DIESELN/A
1991GMCK3500DIESELN/A
1991GMCP3500DIESELN/A
1991GMCR1500 SuburbanDIESELN/A
1991GMCR2500 SuburbanDIESELN/A
1991GMCR3500DIESELN/A
1991GMCV1500 SuburbanDIESELN/A
1991GMCV2500 SuburbanDIESELN/A
1991GMCV3500DIESELN/A
1990ChevroletBlazer6.2LV8N/A
1990ChevroletC1500DIESELN/A
1990ChevroletC2500DIESELN/A
1990ChevroletC3500DIESELN/A
1990ChevroletG206.2LV8N/A
1990ChevroletK1500DIESELN/A
1990ChevroletK2500DIESELN/A
1990ChevroletK3500DIESELN/A
1990ChevroletP30DIESELN/A
1990ChevroletR1500 Suburban6.2LV8N/A
1990ChevroletR2500 Suburban6.2LV8N/A
1990ChevroletR3500DIESELN/A
1990ChevroletV1500 Suburban6.2LV8N/A
1990ChevroletV2500 Suburban6.2LV8N/A
1990ChevroletV3500DIESELN/A
1990GMCC1500DIESELN/A
1990GMCC2500DIESELN/A
1990GMCC3500DIESELN/A
1990GMCG25006.2LV8N/A
1990GMCG35006.2LV8N/A
1990GMCJimmyDIESELN/A
1990GMCK1500DIESELN/A
1990GMCK2500DIESELN/A
1990GMCK3500DIESELN/A
1990GMCP3500DIESELN/A
1990GMCR1500 SuburbanDIESELN/A
1990GMCR2500 SuburbanDIESELN/A
1990GMCR3500DIESELN/A
1990GMCV1500 SuburbanDIESELN/A
1990GMCV2500 SuburbanDIESELN/A
1990GMCV3500DIESELN/A
1989ChevroletBlazer6.2LV8N/A
1989ChevroletC1500DIESELN/A
1989ChevroletC2500DIESELN/A
1989ChevroletC3500DIESELN/A
1989ChevroletG206.2LV8N/A
1989ChevroletG306.2LV8N/A
1989ChevroletK1500DIESELN/A
1989ChevroletK2500DIESELN/A
1989ChevroletK3500DIESELN/A
1989ChevroletP20DIESELN/A
1989ChevroletP30DIESELN/A
1989ChevroletR1500 Suburban6.2LV8N/A
1989ChevroletR2500DIESELN/A
1989ChevroletR2500 Suburban6.2LV8N/A
1989ChevroletR3500DIESELN/A
1989ChevroletV1500 Suburban6.2LV8N/A
1989ChevroletV2500 Suburban6.2LV8N/A
1989ChevroletV3500DIESELN/A
1989GMCC1500DIESELN/A
1989GMCC2500DIESELN/A
1989GMCC3500DIESELN/A
1989GMCG25006.2LV8N/A
1989GMCG35006.2LV8N/A
1989GMCJimmyDIESELN/A
1989GMCK1500DIESELN/A
1989GMCK2500DIESELN/A
1989GMCK3500DIESELN/A
1989GMCP2500DIESELN/A
1989GMCP3500DIESELN/A
1989GMCR1500 SuburbanDIESELN/A
1989GMCR2500DIESELN/A
1989GMCR2500 SuburbanDIESELN/A
1989GMCR3500DIESELN/A
1989GMCV1500 SuburbanDIESELN/A
1989GMCV2500 SuburbanDIESELN/A
1989GMCV3500DIESELN/A
1988ChevroletBlazer6.2LV8N/A
1988ChevroletC1500DIESELN/A
1988ChevroletC2500DIESELN/A
1988ChevroletC3500DIESELN/A
1988ChevroletG206.2LV8N/A
1988ChevroletG306.2LV8N/A
1988ChevroletK1500DIESELN/A
1988ChevroletK2500DIESELN/A
1988ChevroletK3500DIESELN/A
1988ChevroletP20DIESELN/A
1988ChevroletP30DIESELN/A
1988ChevroletR10 Suburban6.2LV8N/A
1988ChevroletR20DIESELN/A
1988ChevroletR20 Suburban6.2LV8N/A
1988ChevroletR30DIESELN/A
1988ChevroletV10 Suburban6.2LV8N/A
1988ChevroletV20 Suburban6.2LV8N/A
1988ChevroletV30DIESELN/A
1988GMCC1500DIESELN/A
1988GMCC2500DIESELN/A
1988GMCC3500DIESELN/A
1988GMCG25006.2LV8N/A
1988GMCG35006.2LV8N/A
1988GMCJimmyDIESELN/A
1988GMCK1500DIESELN/A
1988GMCK2500DIESELN/A
1988GMCK3500DIESELN/A
1988GMCP2500DIESELN/A
1988GMCP3500DIESELN/A
1988GMCR1500 SuburbanDIESELN/A
1988GMCR2500DIESELN/A
1988GMCR2500 SuburbanDIESELN/A
1988GMCR3500DIESELN/A
1988GMCV1500 SuburbanDIESELN/A
1988GMCV2500 SuburbanDIESELN/A
1988GMCV3500DIESELN/A
1987ChevroletBlazer6.2LV8N/A
1987ChevroletG206.2LV8N/A
1987ChevroletG306.2LV8N/A
1987ChevroletP20DIESELN/A
1987ChevroletP30DIESELN/A
1987ChevroletR10DIESELN/A
1987ChevroletR10 Suburban6.2LV8N/A
1987ChevroletR20DIESELN/A
1987ChevroletR20 Suburban6.2LV8N/A
1987ChevroletR30DIESELN/A
1987ChevroletV10DIESELN/A
1987ChevroletV10 Suburban6.2LV8N/A
1987ChevroletV20DIESELN/A
1987ChevroletV20 Suburban6.2LV8N/A
1987ChevroletV30DIESELN/A
1987GMCG25006.2LV8N/A
1987GMCG35006.2LV8N/A
1987GMCJimmyDIESELN/A
1987GMCP2500DIESELN/A
1987GMCP3500DIESELN/A
1987GMCR1500DIESELN/A
1987GMCR1500 SuburbanDIESELN/A
1987GMCR2500DIESELN/A
1987GMCR2500 SuburbanDIESELN/A
1987GMCR3500DIESELN/A
1987GMCV1500DIESELN/A
1987GMCV1500 SuburbanDIESELN/A
1987GMCV2500DIESELN/A
1987GMCV2500 SuburbanDIESELN/A
1987GMCV3500DIESELN/A
1986ChevroletC10DIESELN/A
1986ChevroletC10 Suburban6.2LV8N/A
1986ChevroletC20DIESELN/A
1986ChevroletC20 Suburban6.2LV8N/A
1986ChevroletC30DIESELN/A
1986ChevroletG206.2LV8N/A
1986ChevroletG306.2LV8N/A
1986ChevroletK10DIESELN/A
1986ChevroletK10 Suburban6.2LV8N/A
1986ChevroletK20DIESELN/A
1986ChevroletK20 Suburban6.2LV8N/A
1986ChevroletK30DIESELN/A
1986ChevroletK5 Blazer6.2LV8N/A
1986ChevroletP20DIESELN/A
1986ChevroletP30DIESELN/A
1986GMCC1500DIESELN/A
1986GMCC1500 SuburbanDIESELN/A
1986GMCC2500DIESELN/A
1986GMCC2500 SuburbanDIESELN/A
1986GMCC3500DIESELN/A
1986GMCG25006.2LV8N/A
1986GMCG35006.2LV8N/A
1986GMCJimmyDIESELN/A
1986GMCK1500DIESELN/A
1986GMCK1500 SuburbanDIESELN/A
1986GMCK2500DIESELN/A
1986GMCK2500 SuburbanDIESELN/A
1986GMCK3500DIESELN/A
1986GMCP2500DIESELN/A
1986GMCP3500DIESELN/A
1985ChevroletC10DIESELN/A
1985ChevroletC20DIESELN/A
1985ChevroletC20 Suburban6.2LV8N/A
1985ChevroletC30DIESELN/A
1985ChevroletG206.2LV8N/A
1985ChevroletG306.2LV8N/A
1985ChevroletK10DIESELN/A
1985ChevroletK20DIESELN/A
1985ChevroletK20 Suburban6.2LV8N/A
1985ChevroletK30DIESELN/A
1985ChevroletK5 Blazer6.2LV8N/A
1985ChevroletP20DIESELN/A
1985ChevroletP30DIESELN/A
1985GMCC1500DIESELN/A
1985GMCC1500 SuburbanDIESELN/A
1985GMCC2500DIESELN/A
1985GMCC2500 SuburbanDIESELN/A
1985GMCC3500DIESELN/A
1985GMCG25006.2LV8N/A
1985GMCG35006.2LV8N/A
1985GMCJimmyDIESELN/A
1985GMCK1500DIESELN/A
1985GMCK1500 SuburbanDIESELN/A
1985GMCK2500DIESELN/A
1985GMCK2500 SuburbanDIESELN/A
1985GMCK3500DIESELN/A
1985GMCP2500DIESELN/A
1985GMCP3500DIESELN/A
1984ChevroletC10DIESELN/A
1984ChevroletC10 Suburban6.2LV8N/A
1984ChevroletC20DIESELN/A
1984ChevroletC20 Suburban6.2LV8N/A
1984ChevroletC30DIESELN/A
1984ChevroletG206.2LV8N/A
1984ChevroletG306.2LV8N/A
1984ChevroletK10DIESELN/A
1984ChevroletK10 Suburban6.2LV8N/A
1984ChevroletK20DIESELN/A
1984ChevroletK20 Suburban6.2LV8N/A
1984ChevroletK30DIESELN/A
1984ChevroletK5 Blazer6.2LV8N/A
1984ChevroletP20DIESELN/A
1984ChevroletP30DIESELN/A
1984GMCC1500DIESELN/A
1984GMCC1500 SuburbanDIESELN/A
1984GMCC2500DIESELN/A
1984GMCC2500 SuburbanDIESELN/A
1984GMCC3500DIESELN/A
1984GMCG25006.2LV8N/A
1984GMCG35006.2LV8N/A
1984GMCJimmyDIESELN/A
1984GMCK1500DIESELN/A
1984GMCK1500 SuburbanDIESELN/A
1984GMCK2500DIESELN/A
1984GMCK2500 SuburbanDIESELN/A
1984GMCK3500DIESELN/A
1984GMCP2500DIESELN/A
1984GMCP3500DIESELN/A
1983ChevroletC10DIESELN/A
1983ChevroletC10 Suburban6.2LV8N/A
1983ChevroletC20DIESELN/A
1983ChevroletC20 Suburban6.2LV8N/A
1983ChevroletC30DIESELN/A
1983ChevroletG206.2LV8N/A
1983ChevroletG306.2LV8N/A
1983ChevroletK10DIESELN/A
1983ChevroletK10 Suburban6.2LV8N/A
1983ChevroletK20DIESELN/A
1983ChevroletK20 Suburban6.2LV8N/A
1983ChevroletK30DIESELN/A
1983ChevroletK5 Blazer6.2LV8N/A
1983ChevroletP20DIESELN/A
1983ChevroletP30DIESELN/A
1983GMCC1500DIESELN/A
1983GMCC1500 SuburbanDIESELN/A
1983GMCC2500DIESELN/A
1983GMCC2500 SuburbanDIESELN/A
1983GMCC3500DIESELN/A
1983GMCG25006.2LV8N/A
1983GMCG35006.2LV8N/A
1983GMCJimmyDIESELN/A
1983GMCK1500DIESELN/A
1983GMCK1500 SuburbanDIESELN/A
1983GMCK2500DIESELN/A
1983GMCK2500 SuburbanDIESELN/A
1983GMCK3500DIESELN/A
1983GMCP2500DIESELN/A
1983GMCP3500DIESELN/A
1982ChevroletC10DIESELN/A
1982ChevroletC10 Suburban6.2LV8N/A
1982ChevroletC20DIESELN/A
1982ChevroletC20 Suburban6.2LV8N/A
1982ChevroletC30DIESELN/A
1982ChevroletK10DIESELN/A
1982ChevroletK10 Suburban6.2LV8N/A
1982ChevroletK20DIESELN/A
1982ChevroletK20 Suburban6.2LV8N/A
1982ChevroletK30DIESELN/A
1982ChevroletK5 Blazer6.2LV8N/A
1982ChevroletP20DIESELN/A
1982ChevroletP30DIESELN/A
1982GMCC1500DIESELN/A
1982GMCC1500 SuburbanDIESELN/A
1982GMCC2500DIESELN/A
1982GMCC2500 SuburbanDIESELN/A
1982GMCC3500DIESELN/A
1982GMCJimmyDIESELN/A
1982GMCK1500DIESELN/A
1982GMCK1500 SuburbanDIESELN/A
1982GMCK2500DIESELN/A
1982GMCK2500 SuburbanDIESELN/A
1982GMCK3500DIESELN/A
1982GMCP2500DIESELN/A
1982GMCP3500DIESELN/A
1978ChevroletMonza3.2LV6N/A
1978ChevroletMonza3.8LV6N/A
1978ChevroletMonza2.5LL4N/A
1978ChevroletMonza5.0LV8N/A
1978OldsmobileStarfireN/A
1978PontiacSunbirdN/A
1977ChevroletMonza2.3LL4N/A
1977ChevroletMonza5.0LV8N/A
1977OldsmobileStarfireN/A
1977PontiacSunbirdN/A
1976ChevroletMonza4.3LV8N/A
1976ChevroletMonza2.3LL4N/A
1976ChevroletMonza5.0LV8N/A
1976OldsmobileStarfireN/A
1976PontiacSunbirdN/A
1975OldsmobileStarfireN/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:

003583753583755S146071-35697482282593FLS600FLSA36S8018

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