no. All that white and blue wire is just like a 12v power wire, except it turns off with the key. Your proably confuisng this with the high idle mod, in which case you will need the resistor.

i was in the same boat with not using the upfitter switch. This has worked for me for 2 weeks with no problem. If you are doing GPS be careful on your voltage. If any doubt I would just wire the cig lighter in and then you can always upgrade the GPS without hardwiring it all over again.