Could be several things, however, it is probably an exhaust leak, or in the valve trane. I would start by checking the oil, however, as this is a warning sign, of it being low.
under the hood
check the engine block casting number
it's on the front of the engine block below the water pump
look captain obvious its in the REAR of the block
A faulty sensor in the engine block.
No
The starter on a 2006 Chevy Impala is located on the lower driver's side of the engine, near the transmission. It is typically mounted to the engine block and can be accessed from underneath the vehicle. To reach it, you may need to remove the protective cover or some components for better access.
18436572 clockwise
On the engine block. where on engine block?
The small block chevy turns in a clockwise rotation.
Yes. Bolts right in.
It was for heavy duty use. Trucks, and the Caprice/Impala.