A reader of yesterday’s post (see here) correctly pointed out that there is a third 4-button remote that has FCC ID L2C0007T on the back. That remote is used on GM U-van models — Chevy Venture, Oldsmobile Silhouette and Pontiac Montana — for 2001-2005. It has lock, unlock, panic and a power sliding passenger-side door button.
See 4-button GM van remote here.
These GM vans used different keyfobs depending on the option package and features installed on a vehicle. Vans used a 2-button remote with just lock and unlock buttons, a 3-button remote which is like the 4-button remote except that it has no anti-theft (panic) button, and a 5-button remote for vans equipped with dual power sliding doors.
See van remotes and other L2C0007T keyfobs at this link.
All vans that used a remote with FCC ID L2C0007T are user programmable.