On an inline six it is the last plug (nearest the firewall. On a V6 usually opposite #5 also near the firewall (usually passenger side).
Number six cylinder/spark plug would be on the passenger side, last one to the back.
The 1996 GMC Sierra six-cylinder spark plug gap, is .009. Most spark plugs are pre-gapped by the spark plug manufacturer.
0.60
if its a four cylinder it has four if its a v6 it has six a spark plug per cylinder
0.060 in.
.035 spark plug gap, .02 point gap.
On the inline six cylinder engine , spark plug # 6 is the rear spark plug On the V6 engine , spark plug # 6 is the rear plug on the drivers side of the engine On the V8 engines , spark plug # 6 is the 2nd plug from the front on the drivers side of the engine
It will be the last spark plug on the rear of the passenger side of the engine.
It should be at 0.O25 on standard spark plugs and O.O35 on resistor on resistor spark plugs.
There would be six spark plugs for a six cylinder engine. One for each cylinder. Unless it is a diesel, then there are no spark plugs.
On a ( 1996 ) Ford F-150 : The only six cylinder engine from the factory was the ( 4.9 liter / 300 cubic inch INLINE / straight six cylinder engine ) Check the Vehicle Emission Control Information ( VECI ) decal in the front of your engine compartment for the spark plug gap and type of spark plug that is used ( I BELIEVE it is .044 inch spark plug gap )
Cylinder one is under the first spark plug on the drivers side of the vehicle. It's one, three, and five same order as the spark plugs (driver side) then, two , four and six in the passenger side.