This was in my appointments list for tomorrow on a 2020 GMC Sierra. I have no idea what the fuck this could be, but I guess I’ll find out!

It's written with a pre loaded op code-

§ 95550. Regulation for Under Inflated Vehicle Tires.

(a) Purpose. The purpose of this regulation is to reduce greenhouse gas emissions from vehicles operating with under inflated tires by inflating them to the recommended tire pressure rating.

(b) Applicability.

(1) This regulation applies to all automotive service providers performing or offering to perform automotive maintenance or repair services in California.

Can read full regulation details here.&bhcp=1)

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