It is on the right head, It's the first spark plug in the front of head.
Firing order is 1-5-3-6-2-4
Right head front to rear is 1-3-5
Left head front to rear is 2-4-6 This is you standing in front of engine.
When standing in front of vehicle 2 4 6 is on left side 1 3 5 is on right.
1st cylinder up front on the drivers side.
In the cylinder heads.
If standing in front of the car look in space after fans and before engine it is a round cylinder shaped part at bottom of engine. it has cable running to battery. hard to miss
Standing in front of engine, It will be on the bottom LEFT rear SIDE of the engine.
Standing in front of the engine, It will be on the left rear side of the engine towards the bottom.
I have a Chevy 2004 Colorado V3500 5 cylinder engine. Filter is on the passenger side at the front of the engine. Easy to get too.
Standing in the front of the engine it will be on the bottom right rear SIDE of the engine.
Number one cylinder is the first one on the left or passenger side if you are standing in front of the vehicle.
Standing in the front of the engine, It will be on the back bottom left side of the engine. You will have to lay under the engine to see it.
Coolant sending unit is located at the front of the left cylinder head
Standing in front of the engine, It is in the right head in the back beside the last spark plug.