Terms

Terms of use

Effective October 27, 2026. By using keeponeight.com you accept these terms.

Information only

KeepOnEight publishes general information about GM cylinder deactivation (AFM and DFM) and the plug-in devices sold to disable it. It is not mechanical, legal or professional advice. Fitment verdicts come from manufacturer statements, product listings, GM documents and owner reports; we do not test products ourselves. Specifications, prices and compatibility change: check the seller's current listing and your vehicle before you buy.

Your vehicle, your responsibility

Installing any device on your vehicle is your decision and at your own risk. You are responsible for complying with the laws of your state, including emissions and inspection rules. These devices are not legal for use on California-registered vehicles. Nothing on this site invites you to tamper with emissions controls or to avoid an inspection.

No warranty

The site is provided "as is". To the extent permitted by law, Trade Regency LLC is not liable for any damage, cost or loss arising from the use of this site or of products it describes.

Affiliate links

As an Amazon Associate we earn from qualifying purchases. Sales are made by Amazon or third-party sellers, not by us: orders, returns and warranties are between you and them. How we make money.

Trademarks

General Motors, Chevrolet, GMC, Cadillac, Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade and the product names mentioned are trademarks of their owners. KeepOnEight is independent and not affiliated with or endorsed by them.

Content and corrections

Text, tables and illustrations are © Trade Regency LLC. Found an error? Write to contact@keeponeight.com: we check and correct it.

Governing law

These terms are governed by the laws of the United States and of the state where Trade Regency LLC is organized.