why won't the motor crank over when the ignition key is turned

i only see 2 different ones.that's because if it's a 3.0L or a 3.9L.but you didn't say in your question.you only said 6 cylinder,they both are 6 cylinders.call local trusted repair shop for quotes,see what they say,compare prices.

you say 2 different modules. 1 for the 3.0 and 1 for the 3.9? what are these "modules" and what do they have to do with cranking the engine?

i read your post wrong!i thought models,you say modules!sorry