General Motors has officially announced the second battery-related recall on its big Hummer EV truck. After first dealing with high-voltage battery connector issues, GM is concerned that the battery pack may not be adequately sealed, potentially allowing water to get inside.
And yes, water is probably the last thing you want anywhere near the battery packs inside any EV, let alone the massive Hummer EV battery. GM says that select flanges and seals on the enclosure for its high-voltage battery “may not have been properly primed or electro-coated, inhibiting proper adhesion of the urethane sealant.”
According to the official NHTSA report, GM must recall roughly 735 of the 824 Hummer EVs produced between November 2021 and September 2022. For those wondering, that’s almost every vehicle delivered to date.
Furthermore, the NHTSA states that “vehicles equipped with high voltage battery pack enclosures produced outside of the supplier’s suspect manufacturing window are not included in this recall.” Meaning that a select few owners will be ok.
Judging by the recall notice, GM is aware of three instances where this problem caused water to enter the Hummer EV battery pack. In two of those situations, the electric truck would no longer start, while the third ended with a loss of propulsion while driving.
Thankfully, GM reported no injuries, crashes, or fires due to the situation. Unfortunately, the automaker didn’t announce any fix, a solution, or when repairs begin. Instead, it sounds like GM started alerting dealers this week, with notices going out to owners around the end of November. We’re hopeful it’s a quick fix, but we’ll have to wait and see.