Chevrolet of Watsonville: the $1 Tahoe
A dealership ran a ChatGPT-powered support bot on its website. A tech entrepreneur injected his own instructions and had it agree to sell a 2024 Tahoe for one dollar as a legally binding offer, in the bot's own words, with no takesies backsies. The post drew roughly 20 million views, copycats swarmed the bot, and the vendor pulled it within days. No car changed hands and the offer had no legal force. The lesson survived anyway: there was nothing between the model and a commitment.
What the verified record says.
- Organizations
- Chevrolet of Watsonville; Fullpath (chatbot vendor)
- When
- December 2023
- Failure class
- Prompt injection or supply chain prompt-injection-supply-chain
- Discovered by
- A member of the public public Not caught by the organization running the AI
- Missing control
- Output validation. Rule-based checks that parse what the model produced before a customer sees it. Full definition and the other incidents in this group → Watch this kind of control catch a planted failure → A recorded run of a certificate gate refusing a bad document →
- What would have caught it
- A deterministic pricing floor between the model and any commitment, so no prompt can make the bot agree to a price a person never set.
- Sources
-
- VentureBeat primary
- Verification
- Adjusted: the incident is real, and details were corrected against the primary source before publication. The buyer was a tech entrepreneur running a prompt-injection stunt, not a customer. The no-takesies-backsies line was his own injected instruction, the offer had no legal force, and no car was sold. That the bot came down within a day is not sourced; within days is. Verified against the primary source on August 12, 2026. Published on this site August 13, 2026, updated September 1, 2026.
This record is one of 26 in The receipts, each checked against a primary source before it is published. How the list is built →