The 2013 Buick Regal has double overhead cam (DOHC).
The 2012 Buick Regal has double overhead cam (DOHC).
The 2014 Buick Regal has double overhead cam (DOHC).
The 2011 Buick Regal has double overhead cam (DOHC).
The 2002 Buick Regal has overhead valves (OHV).
The 2001 Buick Regal has overhead valves (OHV).
The 2003 Buick Regal has overhead valves (OHV).
The cam sensor on a 99 Buick Regal is located behind the rear cam bearing cap. It monitors the rotation of the cam and relays information to the vehicle's computer.
The 2.8 engine doesn't use a cam sensor.
In order to replace the cam sensor on a Buick Regal 3.8L, you must first access the main dash board from the back by either entering the hood or removing the panel, and then crossing the two wires in question.
The 2010 Buick Enclave has double overhead cam (DOHC).
The 2008 Buick Enclave has double overhead cam (DOHC).