It is a 3.1 Liter V6, so it has 6 spark plugs.
ALL gasoline engines have spark plugs. Only diesels don't have spark plugs.
the spark gap for the 3.1 is 60,
They are in the sides of the head where the exhaust manifolds are.
How mcuch does a 2003 Chevy Malibu weigh?
I have a 1998 Malibu and we gap at the middle of .060. Perhaps our cars are similar at this point, check!
A 2003 Chevy Suburban will crank but not start if it has no spark or fuel. Checking for a clogged fuel filter or fouled spark plugs can help to resolve the problem.
go by the recommended mileage in the scheduled maintanence section of the owner's manual.
If it's anything like my 97, you have to unbolt the "dogbone" motor mount plate, then put the car in gear and roll it forwards. This will turn the entire engine allowing access to the rear 3 (assuming its a v6) plugs.
is the 4.2 ar the v12 hemi
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You probably mixed up the firing order.