Where I live you see a lot of Fords, Dodge next, then Chevy/GM in the 3/4 and 1 ton segments. In the half ton market, it seems to be pretty evenly distributed. I give Ford the edge on total sales because of more, larger dealerships. Chevy, overall, probably is second, with Dodge a close 3rd despite having much fewer and much smaller dealerships. The Dodge dealers seem to be more service oriented than the rest. I have a Ford car and a Dodge truck, and and take both to the dealerships for service. The Ford dealership takes anywhere from 1 1/2 hours to 4 1/2 hours for simple service (oil change, wheel alignment), the Dodge dealership in 2 services so far has been about 45 min. I always make service appointments about a week in advance, on the 4 1/2 hour day at Ford I was told that the appointment was just for scheduling drop off, not a guarantee that the vehicle would be serviced at that time.