Bulletin No.:

Service Bulletin

Date:

17-NA-299
October, 2020

INFORMATION
Subject:

Information on Michelin Selfseal® Tires Inspection and Repair Procedures

Brand:

Model:

Chevrolet

Bolt EV

Model Year:

VIN:

from

to

from

to

2017

2020

—

—

Engine:

Transmission:

—

—

Involved Region or Country

North America, Europe, GM Korea Company, Brazil, Middle East

Condition

Some customers may experience a larger than 6 mm (1/4’’) in diameter hole in the tread
area, which may not self-seal.

Information

If a customer experiences a larger than 6 mm (1/4’’) in diameter hole, the tread puncture
may be plugged using a one piece patch/stem unit.
If the tread puncture is larger than the one piece patch/stem unit, the tire must be
replaced.

Tire Information
Michelin Selfseal® is a tire technology designed to
prevent air loss when an object penetrates the tread
during everyday driving. Michelin Selfseal® has the
ability to immediately seal the tread puncture up to 6
mm (1/4’’) in diameter.
This bulletin is intended to provide instruction and
procedures for Professional Tire Technicians to inspect
Michelin Selfseal® tires that may have encountered a
tread puncture or experienced inflation pressure loss
when in use. Any inspection of Selfseal tires must be
carried out by a trained tire service technician.
There may be several situations that require inspection
and service as outlined below:
• Situation 1: If a consumer presents a Selfseal®
tire with a penetrating object or knowledge of
penetrating object even though not visible.
• Situation 2: If the tire has been driven
under-inflated or TPMS signal warning of
pressure loss.
• Situation 3: If thorough examination of the tire
shows evidence of a prior penetration or other
potential damage, the tire requires further
inspection.
In all the above cases, the tire must be dismounted for
full inspection and possible repair to the tire by
following RMA Industry Tire Repair procedures.
When repairing a Michelin Selfseal® tire, follow the
method described below.
The repair of a Michelin Selfseal® tire must be
preceded by a careful examination of the tire
concerned. If it was driven under-inflated, it may have
suffered irreversible damage.

Copyright 2020 General Motors LLC. All Rights Reserved.

Only a thorough check of the interior of the tire will help
to determine if it is possible or not to further drive on it,
or repair it.

Service Information
A one piece patch/stem unit is recommended:

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1. Identification of puncture inside tire.

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2. Bore the hole from the inside following its
trajectory.

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October, 2020

Bulletin No.: 17-NA-299

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3. Spread the adhesive directly without brushing. Let
it dry for 5 minutes.

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6. Pull the stem smoothly from the outside.

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4. Remove the protection without touching the
uncovered surface.

7. Roll over the stem base, moving from its center
towards its edge.

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5. Insert the one-piece stem from the inside.

8. Cut the protruding part on the outside without
pulling the body of the stem.

Parts Information
No parts are required for this repair.

Version

2

Modified

Released September 19, 2017
October 09, 2020 – Added 2019-2020 Model Years and updated the Involved Region or
Country section.

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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