Will this work on a 2015 and 2017 gmc sierra?

yes,it works on my 2016 chevy express and my 2010 savana

Do you have to keep button pressed til horn beeps or do you press and release then wit?

Press and hold button until horn beeps. Read the instructions you should have received when purchasing it... CBN......

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JDIAG EL-50448 TPMS Relearn Tool for GM Auto Tire Pressure Monitor System Sensor Activation TPMS Reset Tool OEC-T5 for GM/Buick/Chevy/Cadillac Series Vehicles 2022 Edition

JDIAG EL-50448 TPMS Relearn Tool for GM Auto Tire Pressure Monitor System Sensor Activation TPMS Reset Tool OEC-T5 for GM/Buick/Chevy/Cadillac Series Vehicles 2022 Edition

Product ID: 62577398

⚡Faster sensor activation

🔋Energy-saving design

🚗Wide GM vehicle compatibility

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Unlock GM TPMS Mastery: Fast, Smart, and Wallet-Friendly!

RELIABLE CERTIFIED - CE & FCC approved with a 12-month guarantee—confidence in every activation.
UNIVERSAL GM COVERAGE - Seamlessly works on Chevy, Buick, GMC, Cadillac & more from 2006-2022 with 315/433 MHz sensors.
SAVE 20 80 INSTANTLY - Skip costly dealer visits and tire shops; DIY your TPMS reset and keep your wallet happy.
EFFORTLESS 3 STEP OPERATION - Reset all tires easily by holding the tool near the valve stem—no tech degree required.
RAPID 1 2 MINUTE SENSOR RESET - Activate your TPMS sensors faster than ever with a single button press—no dealer wait times.

The JDIAG EL-50448 is a 2023-updated TPMS relearn tool designed for GM vehicles (Chevy, Buick, GMC, Cadillac, Opel) from 2006-2022. It features energy-saving tech, rapid sensor activation in 1-2 minutes, and supports 315/433 MHz TPMS sensors. With simple 3-step use and CE/FCC certification, it offers a cost-effective alternative to dealer resets, backed by a 12-month warranty.

Specifications

ASIN	B07C6B5K41
Batteries	1 9V batteries required.
Best Sellers Rank	#24,362 in Automotive ( See Top 100 in Automotive ) #24 in Tire Pressure Monitoring System Tools
Brand	JDIAG
Customer Reviews	4.2 4.2 out of 5 stars (6,617)
Date First Available	April 13, 2018
Is Discontinued By Manufacturer	No
Item Weight	5.6 ounces
Item model number	EL50448
Manufacturer	JDiag
Manufacturer Part Number	50448
Model	EL50448
Product Dimensions	2.64 x 1.65 x 6.3 inches
Special Features	CE and FCC Approval, Works with Cars and Trucks, for GM Series Chevy / Buick / GMC / Opel etc

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Great price for an authentic product. Fast international shipping too!

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