--- product_id: 95051426 title: "GM Genuine Parts 13507128 Flex Fuel Sensor | Monitors fuel composition data to support accurate engine-management and fueling adjustments" brand: "gm genuine parts" price: "$120.72" currency: USD in_stock: true reviews_count: 13 category: "Gm Genuine Parts" url: https://www.desertcart.us/products/95051426-gm-genuine-parts-13507128-flex-fuel-sensor-monitors-fuel-composition store_origin: US region: United States of America --- # Monitors 0-100% ethanol fuel mix 100% GM OE spec fit & function Flange mount for easy install GM Genuine Parts 13507128 Flex Fuel Sensor | Monitors fuel composition data to support accurate engine-management and fueling adjustments **Brand:** gm genuine parts **Price:** $120.72 **Availability:** ✅ In Stock ## Summary > ⚡ Drive smarter, not harder — the GM Flex Fuel Sensor that knows your fuel inside out! ## Quick Answers - **What is this?** GM Genuine Parts 13507128 Flex Fuel Sensor | Monitors fuel composition data to support accurate engine-management and fueling adjustments by gm genuine parts - **How much does it cost?** $120.72 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/95051426-gm-genuine-parts-13507128-flex-fuel-sensor-monitors-fuel-composition) ## Best For - gm genuine parts enthusiasts ## Why This Product - Trusted gm genuine parts brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Endure:** Metal construction rated up to 125°C withstands harsh engine environments for long-lasting service. - • **Peace of Mind Warranty:** Backed by a 24-month unlimited mile limited warranty, because your ride deserves trusted parts. - • **Effortless Installation:** Flange mount design means quick, hassle-free replacement—get back on the road faster. - • **GM-Recommended Reliability:** Factory-quality sensor designed to match original GM parts for seamless integration and durability. - • **Precision Ethanol Monitoring:** Ensures your engine optimizes air/fuel mix for peak performance with every drop of E85 or gasoline. ## Overview The GM Genuine Parts 13507128 Flex Fuel Sensor is a precision-engineered, GM OE-spec replacement sensor that accurately measures ethanol content from 0 to 100% in flex fuel vehicles. Designed for perfect fit and reliable performance, it enables your engine control module to optimize fuel mixture and ignition timing for maximum efficiency. Built with durable metal and flange mount for easy installation, it’s backed by a 24-month unlimited mile warranty, making it the trusted choice for GM vehicle owners who demand OEM quality and longevity. ## Description ACDelco GM Original Equipment Flex Fuel Sensors monitor the ethanol content of the fuel in your flex fuel vehicle, and are GM-recommended replacements for your vehicle's original components. The flex fuel sensor signal is used by the engine control module to adjust the air/fuel mixture and ignition timing for efficient operation. These original equipment flex fuel sensors have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Review: 17 sierra - 17 sierra. Got flex fuel now, tune adjusted. E85 is a go. Review: Great part - Works as it should. Reads my e85 perfectly. ## Features - GM-recommended replacement part for your GM vehicle’s original factory component - Offering the quality, reliability, and durability of GM OE - Manufactured to GM OE specification for fit, form, and function - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B073ZQ1G2P | | Best Sellers Rank | #17,690 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Fuel Tank Valve Sensors | | Brand | GM GENUINE PARTS | | Brand Name | GM GENUINE PARTS | | Customer Reviews | 4.7 out of 5 stars 493 Reviews | | Global Trade Identification Number | 00808709652618 | | Included Components | Flex Fuel Sensor | | Item Dimensions | 4.3 x 3.8 x 1.3 inches | | Item Type Name | Flex Fuel Sensor | | Item Weight | 50 g | | Item dimensions L x W x H | 4.3 x 3.8 x 1.3 inches | | Manufacturer | ACDelco | | Material | Metal | | Material Type | Metal | | Measuring Range | 0% - 100% | | Model | 13507128 | | Mounting Type | Flange Mount | | Number of Items | 1 | | Output Type | Analog | | Part Number | 13507128 | | Specific Uses For Product | vehicle operation | | Style | Modern | | Style Name | Modern | | UPC | 808709652618 | | Unit Count | 1 Count | | Upper Temperature Rating | 125 °C | | Warranty Description | 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details. | ## Product Details - **Brand:** GM GENUINE PARTS - **Item Weight:** 50 g - **Item dimensions L x W x H:** 4.3 x 3.8 x 1.3 inches - **Material:** Metal - **Style:** Modern ## Images ![GM Genuine Parts 13507128 Flex Fuel Sensor | Monitors fuel composition data to support accurate engine-management and fueling adjustments - Image 1](https://m.media-amazon.com/images/I/71bghZTMzML.jpg) ## Questions & Answers **Q: Would this be a replacement on a 2004 suburban Z71?** A: Worked on 2004 5.3 suburban. Wired it up closer to the engine bay. The old unit was too far down the line and the wiring went bad to ground. This is just a more modern version with a much easier install. They all produce the voltage necessary by the computer. You will need new fuel line for this install and the pigtail as they are different. Possibly use the old lines near the intake and route it back the manifold input. Or just remove all the old lines and start fresh. The old fuel lines were terrible on my truck and i had to replace the 170000 mile old pump anyway. **Q: Is this 3/8 or 5/16?** A: 3/8" In and 3/8" out **Q: hello， I want to know the difference between 13507128 and 13577429 their prices are not the same ，i want to know which one should i buy？** A: There are two versions of this sensor. One has the ability to measure fluid temperature as well if your aftermarket ECU supports it. Good luck! **Q: Would this fit 2017 Silverado ?** A: It's universal so yes ## Customer Reviews ### ⭐⭐⭐⭐⭐ 17 sierra *by K***Y on May 20, 2026* 17 sierra. Got flex fuel now, tune adjusted. E85 is a go. ### ⭐⭐⭐⭐⭐ Great part *by J***R on November 14, 2025* Works as it should. Reads my e85 perfectly. ### ⭐⭐⭐⭐⭐ Cobb Flex Fuel e85 Sensor Replacement *by B***X on December 13, 2025* 18 Subaru WRX owner here with the first gen e85 Cobb Flex Fuel Kit. This replacement will fix your Ethanol Low Voltage CEL. Simple 5 minute DIY replacement fix. ## Frequently Bought Together - ACDelco GM Genuine Parts 13507128 Flex Fuel Sensor - Flex Fuel Sensor Connector Replacement for GM E85 Flex Pigtail Plastic Fuel Composition Ethanol E85-2 - EVIL ENERGY 6AN Male to 3/8" Quick-Disconnect Female EFI Fuel Rail Fitting Aluminum 2PCS --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/95051426-gm-genuine-parts-13507128-flex-fuel-sensor-monitors-fuel-composition](https://www.desertcart.us/products/95051426-gm-genuine-parts-13507128-flex-fuel-sensor-monitors-fuel-composition) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-27*