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 ...
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 ...
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