2020 Silverado 5.3 would it fit?

It would if you have the harness for it if not you are better off getting a E85 kit for your truck instead.

Does this sensor also measure fuel temperature?

Yes - this sensor also measures temperature. The ACDelco (or Continental) flex fuel sensor outputs a PWM signal that is from 50hz to 150hz for % ethanol content and encodes the fuel temperature in the PWM duty cycle. You need some specific circuitry or an intelligent ECU to extract both % ethanol and fuel temp from the signal pin that is in the 3-pin connector.

Acdelco 13577429 Gm Original Equipment Flex Fuel Sensor

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Drive smarter, not harder — the GM-approved flex fuel sensor your engine deserves!

PLUG AND PLAY FLANGE MOUNT - Easy installation designed specifically for GM flex fuel vehicles—DIY friendly.
PRECISION ETHANOL MONITORING - Optimizes air/fuel mix & ignition timing for peak engine efficiency.
GM ORIGINAL EQUIPMENT QUALITY - Manufactured to exact GM OE specs for seamless fit and reliable performance.
TRUSTED BY PROFESSIONALS DI YERS - Highly rated with 4.6 stars from 372 reviews, outperforming aftermarket kits.
ROBUST STAINLESS STEEL CONSTRUCTION - Engineered for long-lasting durability under high-temperature conditions (up to 250°F).

The ACDelco 13577429 GM Original Equipment Flex Fuel Sensor is a precision-engineered sensor that monitors ethanol levels in flex fuel vehicles. Built to GM OE specifications with durable stainless steel and a flange mount design, it ensures optimal engine performance by enabling accurate air/fuel mixture and ignition timing adjustments. Trusted by both professionals and DIY enthusiasts, this sensor delivers reliable, long-lasting operation tailored for GM vehicles.

Specifications

ASIN	B01GQR9C5O
Best Sellers Rank	807,137 in Automotive ( See Top 100 in Automotive ) 57 in Automotive Fuel Tank Valve Sensors
Brand	ACDelco
Customer Reviews	4.6 out of 5 stars 372 Reviews
Global Trade Identification Number	00808709571094
Included Components	ACDelco - Flex Fuel Senso (Slp-P1) (13577429)
Item Dimensions	10.2 x 10.2 x 2.5 centimetres
Item Type Name	ACDelco Auto Parts
Item Weight	0.05 Kilograms
Item dimensions L x W x H	10.2 x 10.2 x 2.5 centimetres
Item weight	0.05 Kilograms
Manufacturer	AC Delco
Manufacturer Part Number	13577429
Material	Stainless Steel
Model Number	13577429
Mounting Type	Flange Mount
Mounting type	Flange Mount
Output Type	Analog
Specific Uses For Product	automotive, motorcycle
Style	Modern
Style Name	Modern
UPC	808709571094
Upper Temperature Rating	250 Degrees Fahrenheit

Reviews

J**I

As described

5.09.2021

K**B

Great for DIY Flex Fuel Sensor

Way better than flex fuel kits. Made my own flex fuel kit for under 250 total for a 2019 bmw 330i and works perfect

25.05.2025

L**A

Works out of the box with Hondata KPro V4

Cheaper than buying a whole flex fuel kit and worked perfectly with my KPro V4 to add flex fuel capability to my K24 swapped EG

27.07.2024

A**N

Works as described.

As described. No issues.

16.09.2019

J**N

Great product

Used for a E85 conversion on my 2010 Camaro, has been holding up so far and worked well on the dyno, great for aftermarket use or OEM

26.10.2023

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