A check engine light is always caused by the same thing; the computer has detected a fault (some kind of problem) and is instructing you to connect a code scanner to read the code. That's the only way to know WHAT the computer is trying to tell you.
The 2006 GMC Savana has a V6 engine.
The 2006 GMC Savana-Cargo has a V6 engine.
The 2006 GMC Savana has a 4.3 L base engine size.
The 2006 GMC Savana's engine produces 195 hp @ 4600 rpm.
The 2006 GMC Savana-Cargo has a 4.3 L base engine size.
The 2006 GMC Savana's engine produces 260 ft-lbs. @ 2800 rpm.
The 2006 GMC Savana-Cargo's engine produces 195 hp @ 4600 rpm.
The 2006 GMC Savana-Cargo's engine produces 260 ft-lbs. @ 2800 rpm.
On the bottom of the engine mounted on the oil pan.
The 2006 GMC Savana has 12 valves.
The 2006 GMC Savana has overhead valves (OHV).
The 2006 GMC Savana has a 4-speed automatic.