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I had to call OnStar support and they corrected it to 3 years. It must be a common issue because they didn't give me a hard time about it at all. Thanks for the replies!

I have a 25 and mine is 3 years. Even tells me the date when I log into OnStar link that’s included in my monthly vehicle update email. I’ve had mine 14 months and have 22,000 miles.

3 years for me as well

General Motors has begun rolling out a new vehicle software update, GM Update V654.10, dated February 14, 2026, and it brings several behind-the-scenes improvements aimed at battery protection and diagnostic reliability.

According to the official release notes, this update focuses heavily on improving battery health management across temperature extremes. GM has implemented enhancements to better protect the battery in cold weather conditions, as well as fixes designed to improve battery performance and longevity during high-temperature operation.

In addition to battery-related improvements, the update also includes diagnostic system refinements. These changes are intended to reduce unnecessary or false service messages while also improving overall diagnostic responsiveness, which should help both owners and service departments identify real issues more accurately and quickly.

What This Update Improves

• Better battery protection in cold climates
• Improved battery health safeguards in hot temperatures
• Fewer unnecessary service warnings
• Faster and more responsive vehicle diagnostics