The spark plug gap needed is for a 4cyl dodge caravan and not a grand caravan if it makes any difference. Thanks The answer to your question is printed in the owner's manual and is listed on a placard under the hood or on the radiator frame.
Fallow the plug wires!
The torque specification is 13 foot pounds or 130 inch pounds for the spark plugs on a 2007 dodge caravan 3.3 liter
Need to replace rear spark plugs
They are screwed into the engine at the ends of the spark plug wires.
The spark plug gap is .050 inch.
1.1 mm or about .042
spark plug gap on your van is .048-.053
Check spark plugs, plug wires, do a compression test
The gap is .050