Would this be a replacement on a 2004 suburban Z71?

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.

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？

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!

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GM Genuine Parts 13507128 Flex Fuel Sensor

GM Genuine Parts 13507128 Flex Fuel Sensor

Product ID: 95051426

Details

Brand
GM GENUINE
Item Weight
50 Grams
Item dimensions L x W x H
4.3 x 3.8 x
Material
Metal
Style
Modern

🔥Monitors 0-100% ethanol fuel mix

⚙️Precision GM OE fit

🛡️Durable metal build, 125°C rated

₨1993

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Description

⚡ Drive smarter, not harder with GM’s precision flex fuel sensor!

BUILT TO ENDURE - Robust metal construction rated for up to 125°C ensures long-lasting reliability under pressure.
PLUG AND PLAY UPGRADE - Flange mount design guarantees seamless installation—get back on the road faster.
PEACE OF MIND WARRANTY - Backed by a 24-month unlimited mile limited warranty, because your ride deserves the best.
ETHANOL CONTENT MASTERY - Accurately measures 0-100% ethanol to optimize your engine’s air/fuel mix and ignition timing.
GM RECOMMENDED AUTHENTICITY - Engineered to GM OE specs for flawless fit, form, and function—no compromises.

The GM Genuine Parts 13507128 Flex Fuel Sensor is a factory-spec replacement sensor designed to monitor ethanol levels in flex fuel vehicles. Manufactured by ACDelco to meet GM OE standards, it ensures optimal engine performance by adjusting fuel mixture and ignition timing. Featuring a durable metal build rated for 125°C and a user-friendly flange mount, it comes with a 24-month unlimited mile warranty for reliable, long-term use.

Specifications

ASIN	B073ZQ1G2P
Best Sellers Rank	#19,405 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Fuel Tank Valve Sensors
Brand Name	GM GENUINE PARTS
Customer Reviews	4.7 4.7 out of 5 stars (490)
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 Grams
Manufacturer	ACDelco
Material Type	Metal
Measuring Range	0% - 100%
Model	13507128
Mounting Type	Flange Mount
Output Type	Analog
Part Number	13507128
Style Name	Modern
UPC	808709652618
Unit Count	1.0 Count
Upper Temperature Rating	125 Degrees Celsius
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.

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