The GMC Hummer EV and GMC Sierra EV are listed in a new General Motors service update that includes a few tweaks for the vehicles’ high-voltage battery software. The new GM Service Update was issued ...
GM has issued a Service Update that applies to certain units of GMC full-size trucks and SUVs, including the Sierra, Yukon, and Yukon XL, which is related to an ECM software update. For GMC models, it ...
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