Engine Component Description: Notes
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of GENERAL MOTORS CORP.
The 3.5L, 4-stroke, single overhead cam (SOHC) engine is identified as RPO L66 and VIN U. The V6 engine is a 24 valve variable valve timing and lift electronic control design.