2022

GMC Issues New Service Bulletin For HUMMER EV Center Roof Water Leaks

Water intrusion through the HUMMER EV’s  Infinity Roof Panels has been an ongoing issue, and GMC has just issued a new Service Bulletin with a fix that plans on getting the leaks under control. Released this month (April 2023), Service Bulletin N222378440 is for the 2022 model year GMC HUMMER EV Pickup. The condition: “On… Continue reading GMC Issues New Service Bulletin For HUMMER EV Center Roof Water Leaks