GM Bulletin No.: 12272
Date: January 2013

Service Bulletin

SERVICE UPDATE
SUBJECT:

Service Update for Inventory and Customer Vehicles
Passenger Safety Belt Reminder Inoperative
Expires with Base Warranty

MODELS:

2013 Cadillac ATS
Equipped with Unheated Leatherette Seat Trim (H2H/H2G)

This service update includes vehicles in dealer inventory and customer vehicles that
return to the dealership for any reason. This bulletin will expire at the end of the involved
vehicle's New Vehicle Limited Warranty period.
PURPOSE
This bulletin provides a service procedure to inspect for the proper activation of the passenger
safety belt reminder light and chime and, if necessary, reprogram the passenger presence
module on certain 2013 model year Cadillac ATS vehicles, equipped with unheated leatherette
seat trim (H2H/H2G). The seat trim on these vehicles may affect the pressure measurement
used to activate the passenger safety belt reminder light and chime. With this condition, an
unbelted occupant in the passenger seat may not be detected and the reminder light and chime
will not activate. This condition does not affect the operation of the airbag.
This service procedure should be completed as soon as possible on involved vehicles
currently in dealer inventory and customer vehicles that return to the dealer for any type
of service during the New Vehicle Limited Warranty coverage period.
VEHICLES INVOLVED
All involved vehicles are identified by VIN in the Global Warranty Management System –
Investigate Vehicle History Application. Dealership technicians should always check this site to
confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is
important to routinely use this tool to verify eligibility because not all similar vehicles may be
involved regardless of description or option content.
Additionally, a list of involved vehicles currently in dealer inventory is available on the “Service
Update Bulletin Information” link under the “Service” tab in GM GlobalConnect. Customer
vehicles that return for service, for any reason, and are still covered under the vehicle's base
warranty should also be checked for vehicle eligibility.
Copyright 2013 General Motors. All Rights Reserved.

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January 2013

Bulletin No.: 12272

PART INFORMATION
No parts are required for this service update.
SERVICE PROCEDURE
Note: Use the inspection below to determine if the vehicle exhibits a less sensitive passenger
seat belt reminder. If the condition is present, reprogram the passenger presence module.
Inspection
1. Verify the vehicle is equipped with leatherette seat trim (RPO H2G or H2H).
2. Turn the ignition to the RUN position.
3. Wait 5 seconds and with the passenger seat empty, verify that the Passenger Air Bag status
indicator displays OFF.
4. Ensure the passenger seat belt is unbuckled.
5. Test the passenger seat belt reminder for proper function.
5.1 Open front passenger side door.
5.2 Ensure front passenger side seat belt is unbuckled.
5.3 Stand outside the vehicle and place both hands flat on the center of the passenger seat
bottom cushion.
5.4 Apply approximately 40 lbs of pressure to the seat bottom cushion.
5.5 Determine if the Passenger Seat Belt Reminder Indicator illuminates.


If the Passenger Seat Belt Reminder Indicator illuminates, no further action is
required.



If the Passenger Seat Belt Reminder Indicator does NOT illuminate, program the
passenger presence module. Refer to Passenger Presence Module Programming in
this bulletin.

Passenger Presence Module Programming
Do not attempt to order the calibration number from GM Customer Care and Aftersales. The
calibration numbers required for this service procedure are programmed into control modules
via a Multiple Diagnostic Interface (MDI) with the calibration update. When using a MDI for
reprogramming, ensure that it is updated with the latest software version. Use TIS2WEB on or
after 01/31/13 to obtain the calibration. If you cannot access the calibration, call the Techline
Customer Support Center and it will be provided.
For step-by-step programming instructions, please refer to SI and the Techline Information
System (TIS) terminal.
1.

Verify that there is a battery charge of 12 to 15 volts. The battery must be able to maintain
a charge during programming. Only use an approved Midtronics® PSC 550 Battery
Maintainer (SPS Programming Support Tool EL-49642) or equivalent to maintain proper
battery voltage during programming.

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2.

January 2013

Bulletin No.: 12272

Reprogram the passenger presence module. Refer to SI and Service Programming System
(SPS) documentation for programming instructions, if required.
2.1 Connect the MDI to the vehicle.
2.2 Select J2534 MDI and Reprogram ECU from the Select Diagnostic Tool and
Programming Process screen.
2.3 Select K85 Passenger Presence Module -- Programming from the Supported
Controllers screen.
2.4 Follow the on-screen instructions.

3.

Clear diagnostic trouble codes (DTCs).

WARRANTY TRANSACTION INFORMATION
Submit a transaction using the table below.
Labor
Code
V2747
V2748

Description
Inspect Passenger Presence System – No Further Action Required
Inspect & Reprogram Passenger Presence System

Labor
Time
0.2
0.4

DEALER PROGRAM RESPONSIBILITY
Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your
facility for service in the future, and the vehicle is still covered under the New Vehicle Limited
Warranty, you must take the steps necessary to be sure the service update correction has been
made before selling or releasing the vehicle.

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 tools,
equipment, 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 dealer for information on whether your vehicle may benefit from the information.

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