35 and it should say it right on the radiator support bracket, but I could be wrong. I think it's 35 and it should say it on the radiator support bracket, but it could be 45.
a/c delco is the best
8 spark plugs
There are four spark plugs on each side of your 1991 Chevrolet engine. The spark plugs will be near the bottom of the engine.
Every gas burning internal combustion engine has spark plugs. Diesel engines do not. Your Impala is not a diesel, so it has plugs.
3 of the plugs are on top of the mottor and 3 of them are on the bottom side
Remove the spark plug wires from your 1993 Chevy Astro spark plugs. Remove the spark plugs with a 5/8 deep well socket, by turning the socket to the left. Reverse the process to install the new spark plugs.
You can begin by removing the spark plug wires from your 1985 Chevrolet S 10 Blazer spark plugs. Use a 5/8 deep well socket to turn the spark plugs out. Turning the socket to the left will loosen the spark plugs. Reverse the process to install the new spark plugs.
A 2004 Chevrolet Trailblazer that has a 4.2 liter engine will have a spark plug gap of .044 inches. The best spark plugs for this vehicle are iridium spark plugs.
It could be your coil but then again I would have to see it to know.
10
.035
you rotate the engine to get to the rear plugs but the front ones are easy to replace