18149: Customer Satisfaction Program – Possible Inaccurate Fastener Torque – 2018-2019 Chevrolet Corvette

#18149: Customer Satisfaction Program – Possible Inaccurate Fastener Torque – (May 21, 2018)

Subject: 18149 Possible Inaccurate Fastener Torque
Models: 2018–2019 Chevrolet Corvette

Reference Number: N182157470 Release Date: May 2018
Revision: 00
Attention: This program is in effect until May 31, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Corvette 2018 2019

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 and 2019 model year Chevrolet Corvette vehicles may have a condition in which, the front and/or rear spring strap retainer bolts, and the front and/or rear stabilizer shaft clamp bolts may not have achieved the intended torque value. Under-torqued fasteners could result in suspension noise or shortened service life of components.
Correction Confirm the torque of the identified fasteners or replace the fasteners if bolts are one-time use. The Service Procedure below includes VIN specific information on which fasteners must be serviced for each affected vehicle.

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17479: Customer Satisfaction Program – Super Cruise Feature Enhancements – 2018 Cadillac CT6

#17479: Customer Satisfaction Program – Super Cruise Feature Enhancements – (May 21, 2018)

Subject: 17479 Super Cruise Feature Enhancements
Models: 2018 Cadillac CT6

Reference Number: N172132090 Release Date: May 2018
Revision:
Attention: This program is in effect until May 31, 2020.
Make Model Model Year RPO Description
From To
Cadillac CT6 2018 2018 UKL Hands-Free Lane Following (Super Cruise)

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition A software update package is available for the 2018 Cadillac CT6 with Super Cruise.

The enhanced Super Cruise software will improve lane centering and add descriptive instrument cluster messaging that will allow drivers to better understand why Super Cruise is unavailable or why Super Cruise needs to disengage and return control to the driver. We’ve heard feedback from customers that they would like additional information on the operation of the Super Cruise feature and we’ve added new descriptive messaging to address this request.

As a result of the software updates being provided, system performance will be enhanced in the following ways:

  • Easier to Engage Super Cruise. Customers will notice in some situations the Super Cruise symbol now appears more easily when centering their vehicle in the lane allowing them to engage Super Cruise. This includes the ability to more easily reengage Super Cruise after making a lane change.
  • Improved Adaptive Cruise Control. The adaptive cruise control portion of Super Cruise has been enhanced to provide smoother acceleration and braking behavior. Certain 2018 model year Cadillac CT6 vehicles, equipped with Super Cruise, may have a condition in which the vehicle, under certain road conditions may shift left or right while traveling in its lane during Super Cruise operation. Additionally, if the Super Cruise system is not able to be engaged, the cluster messaging only shows “unavailable” without further details on why the system is not available.
Correction Dealers are to update the Super Cruise software, and provide the customer with an owner manual insert that outlines the new available cluster messaging.

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18137: Customer Satisfaction Program – Customers Double Charged for Grille – 2018 Chevrolet Colorado

#18137: Customer Satisfaction Program – Customers Double Charged for Grille – (Apr 20, 2018)

Subject: 18137 — Customers Double Charged for Grille
Models: 2018 Chevrolet Colorado

Reference Number: N182159620 Release Date: April 2018
Revision: 00
Attention: This program is in effect until May 31, 2020.
Make Model Model Year RPO Description
From To
Chevrolet Colorado 2018 2018 PDB Shoreline Special Edition Package

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 model year Chevrolet Colorado vehicles, equipped with the Shoreline Special Edition package (RPO PDB) may have a condition in which a double charge was applied for the optional body colored grille at the time of vehicle purchase.
Correction Provide the customer with a reimbursement check in the amount of $595.

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18135-01: Customer Satisfaction – Loss of Power Steering Assist – 2013 Cadillac ATS

#18135-01: Customer Satisfaction – Loss of Power Steering Assist – (May 2, 2018)

Subject: 18135–01 — Loss Of Power Steering Assist
Models: 2013 Cadillac ATS

Reference Number: N172133990 Release Date: April 2018
Revision: 01
Revision Description: This bulletin has been revised to update the condition statement and customer letter. Please discard all copies of Bulletin 18135.
Attention: All involved vehicles that are in dealer inventory must be held and not delivered to customers, dealer traded, or used for demonstration purposes until the repair contained in this bulletin has been performed on the vehicle.

This program is in effect until April 30, 2020.

Make Model Model Year RPO Description
From To
Cadillac ATS 2013 2013

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2013 model year Cadillac ATS vehicles may have a condition in which power steering software may disable power steering assist within a few seconds after a warm restart, or while idling or driving at very low speeds following a warm restart. If this occurs, a chime will sound and the vehicle’s driver information center will display the following message: “DRIVE WITH CARE & SERVICE POWER STRG.ASSIST”. Restarting the vehicle may resolve the software fault.
Correction Reprogram the power steering control module.

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17386-02: Customer Satisfaction Program – SDGM and BYOM2+ Radio Software Updates – 2017 Chevrolet Bolt EV

#17386-02: Customer Satisfaction Program – SDGM and BYOM2+ Radio Software Updates – (May 21, 2018)

Subject: 17386–02 — SDGM and BYOM2+ Radio Software Updates
Models: 2017 Chevrolet Bolt EV

Reference Number: A172114410 Release Date: May 2018
Revision: 02
Revision Description: A labor time adjustment has been made in the Claim Information Section for Labor Operation 9103688 and an “Important” statement has been added before Step 1 of the Update Procedure. Please discard all previous copies of bulletin 17386-01.
Attention: The reprogramming of the vehicles involved in this field action will be initially attempted by OnStar through in-vehicle prompts from the radio display. The new software updates will enhance the functionality of the vehicle’s Serial Data Gateway Module (SDGM) and the Bring Your Own Media (BYOM) radio. The over-the-air update process will be rolled out to vehicle owners in phases beginning April 2018 through August 2018. However, if the remote vehicle update is unsuccessful or the customer declines this service, dealers will be required to reprogram the vehicle. This program is in effect until April 30, 2020.

All involved vehicles are identified by Vehicle Identification Number (VIN) on the Investigate Vehicle History (IVH) screen in GM Global Warranty Management (GWM) system. During the service write-up process, dealership personnel should check IVH to determine if installation of the new software package has already been completed. If the remote vehicle update has been downloaded or installed, DO NOT install the update via USB. Otherwise, proceed to Update Procedure Using TIS2WEB (USB Download).

Make Model Model Year RPO Description
From To
Chevrolet Bolt EV 2017 2017 IOB BYOM2+ Radio

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2017 model year Chevrolet Bolt EV vehicles need to be reprogrammed with an updated software package. Depending on the vehicle’s configuration, it may require two updates. The software updates will improve phone connectivity, display resolution, rear camera operation, and prevent instances of intermittent screen freezing. The updates will also remove certain video playback functionality and improve the ability to perform software updates to the radio.
Correction OnStar will update vehicles remotely through in-vehicle prompts from the radio display. However, some customers may decline the vehicle update or the update is attempted, but is not successful. In such cases, dealers will be required to reprogram the vehicle with the new software updates.

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