NHTSA ID Number: 10178277
Manufacturer Communication Number: 20NA122
Summary
This informational bulletin provides Information on Proper Liftgate Adjustment.
3 Affected Products
Vehicles
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Copyright 2020 General Motors
LLC. All Rights Reserved.
Service Bulletin Bulletin No.: 20-NA-122
Date: June, 2020
INFORMATION
Subject: Information on Proper Liftgate Adjustment
Brand: Model:
Model Year: VIN:
Engine: Transmission:
from to from to
Buick Encore GX 2020 2021 — All All
Chevrolet Trailblazer 2021 2021 — All All
Involved Region or Country North America
Information
The following information should be used to help adjust
the liftgate properly.
An improper liftgate adjustment may cause unwanted
noises, so proper adjustment is important.
To properly adjust the liftgate, complete the following
steps:
1. Open the liftgate.
5613599
2. Close the liftgate with a piece of paper between the
bumpers of the liftgate and the vehicle itself.
⇒ The paper should not be able to be pulled out,
and the bumpers should be firmly seated.
3. Repeat and verify as necessary.
Version 1
Modified Released June 02, 2020
GM bulletins are intended for use by professional technicians, NOT a “do-it-yourselfer”. They are written to inform these
technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper
service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a
job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your
vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the
information.
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1 Associated Document
Manufacturer Communications
Bulletin No.: 20-NA-122
Date: June, 2020
- Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
- GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
- [Application] GVPART4U automotive replacement shock lift supports is compitable with Cadillac 2015-2019 Escalade & Escalade ESV, Chevrolet 2015-2020 Suburban & Tahoe, 2016-2019 Suburban 3500 HD, GMC 2015-2020 Yukon & Yukon XL
- [Replacement] GVPART4U rear hatch shocks part number: 84306929 23235697 23431143 84036214 84183516 84183515 23226162 23408748 23431142 23487668
- [Advantage] GVPART4U power liftgate support struts are through completely technology upgrade. The motor runs smoothly, reducing shock and making low noise
- [Fitted] The OEM design for plug-in installation, matched with your origin power liftgate, it's easy to install with simple hand tools in just a few minutes
- [Performance] GVPART4U lift support shock struts are made of high-quality steel, powerful enough to support. Our lift aculator passed 50,000 fatigue tests, has excellent pressure-bearing performance, which is solid and durable
- Country of Origin : United States
- The package length is 16.51 centimeters
- The package height is 80.01 centimeters
- The package width is 17.018 centimeters
- 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
- AUTOEXACT PRECISION FIT REPLACEMENT TAILGATE STRUT: Specifically designed fit for Cadillac 2015-2020 Escalade & Escalade ESV, Chevy 2015-2020 Suburban & Tahoe, 2016-2019 Suburban 3500 HD, GMC 2015-2020 Yukon & Yukon XL power liftgate strut replacement (Left & Right Sides). Directly replaces worn or weak original tailgate support. Replacement part number #84306929, 84183515, 84183516, 84036214, 23226162, 23235697, 23431143, 84306929, 84183515, 23487668, 23408748, 23431142. ⚠Factory power liftgate only — Not compatible with manual or modified liftgates. Not sure if your vehicle is compatible? Verify with your key fob for a liftgate button or email us with your VIN before purchasing
- RESTORE SMOOTH & RELIABLE LIFTGATE OPERATION: Fix slow, weak, or jerky tailgate movement caused by worn struts. Supports full automatic open/close cycles and keeps your liftgate securely in place — just like new. Good choice when original lift support struts become weak or slow. Perfect for daily use or after long-term tailgate wear
- SAFETY & RELIABILITY: Autoexact electric liftgate strut stable hydraulic damping ensures smooth, safe tailgate operation every day. Made from high-quality steel with waterproof and anti-fog protection to improve performance in harsh weather. Each rear hatch strut is leakage-tested to help ensure reliable operation and longer service life. Helps prevent sudden tailgate drop and accidental damage
- QUIET, DURABLE, WEATHER-RESISTANT DESIGN: The Autoexact liftgate actuator uses a high-torque, low-noise motor delivers near-silent operation (~45 dB at 30cm). Helps minimize clicking, grinding, or squeaking noises. Gas-spring damping and corrosion-resistant steel provide reliable performance in all weather conditions
- EASY INSTALLATION: Plug-and-play design makes it a feasible DIY project for most users with basic tools, no complex modification required. Cost-effective alternative to dealership repair. ⚠ Important: Always reinstall the interior tailgate cover panel before operating the liftgate. Testing without the panel may prevent full opening or damage the struts
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