2007 Dodge 2500 Mega Cab No Heat, AC, Defroster, Vent fan

The light is flashing because there is a problem in the system controls for the 4 wheel drive. You now need to have the control module scanned for fault codes and the correct diagnostics performed for the codes received to repair the problem.

PROBLEM COULD BE IN THE 4WD SWITCH IS FAULTY OR THE SWITCH WIRING SHORTING TO GROUND

Give me some more information about this problem. May be i can help.

i have never done one to be honest but i would imagine that you will need to remove the headlight to gain access as is common with a lot of new vehicles

fan controler is bad .

CHECK FOR BROKEN WIRES BETWEEN DOOR AND DOOR POST..THERE WILL BE A RUBBER BOOT IN BETWEEN DOOR..WIRES TEND TO GET BROKEN IN THESE FROM DOORS OPENING AND CLOSING..THIS WHERE I WOULD START LOOKING

The difference in chasis means you can tow more or haul more, the truck is better equiped with a heavy duty suspension componets, heavy duty transmission, etc, Look through your owners manual for service requirments and intervals. If the vehicle has a warrenty make sure the dealer does the service to keep it inline with the warrenty, some things you can do to the vehicle yourself, others must be done at the dealer unless of coarse the vehicle isn't under warrenty.

the fan belt has broke,sorry serpentine belt

everything i know about the truck indicates they dont have one

it should be about 35 gallons