If the SDM becomes inoperative, it will not detect a crash or command the necessary air bag deployment, increasing the risk of injury in the event of a crash.

Air Bags — Air Bag/Restraint Control Module

Date Announced

MAY 24, 2018

Vehicles Affected

88,503

GMC Recall #

18179

NHTSA Campaign #

18V340000

Summary

General Motors LLC (GM) is recalling certain 2018 GMC Terrain vehicles. The sensing diagnostic module (SDM) that senses a crash and deploys the necessary air bags may not power down correctly when the vehicle is shut off, causing it to be inoperative when the vehicle is restarted.

Actions

GM will notify owners, and dealers will reprogram the SDM with updated software, free of charge. The recall began June 29, 2018. Owners may contact GMC customer service at 1-800-462-8782. GM's number for this recall is 18179.

Documents (19)

• Recall 573 Report-Amendment 1
• Recall 573 Report-Amendment 2
• Manufacturer Notices(to Dealers,etc) - Date: October 11, 2018 Subject: Reopened Recalls Involving Module Reprogramming Events
• Safety Bulletin - Reference Number: N182155400 Release Date: June 2018 Revision: 01
• Manufacturer Notices(to Dealers,etc) - Date: June 5, 2018 Subject: 18179 01 – Safety Recall SDM Loss of Communication Revised Service Procedure and Warranty Information
• Safety Bulletin - Reference Number: N182155400 Release Date: May 2018
• Recall Acknowledgement
• Defect Notice 573 Report
• Manufacturer Notices(to Dealers,etc) - Date: May 24, 2018 Subject: 18179 - Safety Recall SDM Loss of Communication
• Frequently Asked Questions (FAQs) for Safety Recall 18179 SDM Loss of Communication
• Reopened Recalls Involving Module Reprogramming Events - FAQs
• Recall Quarterly Report #3, 2018-4
• Recall Quarterly Report #4, 2019-1
• Recall Quarterly Report #1, 2018-2
• ISSUED Owner Notification Letter(Part 577)
• Recall Quarterly Report
• Recall Quarterly Report #5, 2019-2
• Recall Quarterly Report #7, 2019-4
• Recall Quarterly Report #6, 2019-3