This vehicle should have platinum fine tip or iridium plugs, neither need a gap setting
It is right after the 4th spark plug on drivers side
"Where is the oil plug located for a 2008 Chevy silverado ext cab?"
The radiator drain plug on a 1989 Chevy C1500 Silverado is on the bottom of the radiator.
gap is 0.60,
Try this link: http://www.etrailer.com/faq_cbc.aspx
That would be the 3ed spark plug from the front of the head on the drivers side.
On a 1999 Chevy Silverado, the radiator drain plug is typically located at the bottom of the radiator on the driver's side. It may be a plastic or metal petcock that you can turn counterclockwise to open. Make sure to place a container underneath to catch any coolant that drains out. Always ensure the engine is cool before attempting to open the drain plug.
0.060 Plug gap.
Yes.
0.060 in
.40 gap
.060