Pickup Box Endgate Will Not Fully Close by Itself – 2019-2020 Chevrolet Silverado & GMC Sierra

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Service B n
Bulletin No.: 20-NA-059
Date: June, 2020

TECHNICAL
Subject: Pickup Box Endgate Will Not Fully Close by Itself

Brand: Chevrolet GMC

Model:

Silverado 1500 (New Model)
Sierra 1500 (New Model)
Silverado 1500

Model Year: from to

2019 2019

Date Breakpoint: from to

Engine:

l

Transmission:

All

GMC

3500HD
Sierra 1500
Sierra 2500HD/ 3500HD

Involved Region or Country Additional Options (RPOs)
Condition Cause

Preliminary Procedure

North America, Middle East, Israel
Equipped with GATE FUNCTION-POWER (QT6).
Some customers may comment that the power up/down pickup box endgate will not fully close when
using the power option.
The cause of the condition may be the endgate may be misaligned, causing a bind.
Some vehicles, which have a tonneau cover installed, may be affected by a similar Condition,
however the Cause and Correction are completely different from this bulletin. On these vehicles, it
will be necessary rule out the tonneau cover as the possible Cause of the condition:
1. Open the rear end panel of the tonneau cover.
2. Cycle the power tailgate 5 times using push button activation for auto open and close.
• If the power endgate Does function properly, DO NOT proceed with this bulletin repair, but move
on to Bulletin # 20–NA-044 and complete the tonneau adjustment procedure.
• If the power endgate still DOES NOT function properly, continue on and complete the Correction
outlined in this bulletin.

Correction
4992376
Upon verifying the condition, adjust the endgate (1). Refer to Endgate Adjustment, in SI.
Parts Information
No parts are required for this repair.
Warranty Information

For vehicles repaired under warranty, use:
Labor Operation
1414652
Description
Endgate Adjustment
Labor Time
Use Published Labor Operation Time

Version Modified

2
Released March 06, 2020
Revised June 04, 2020 – Added Preliminary Procedure before Correction
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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