I have been having smoking issues with the driver's side rear brakes on my '06 (about 94,000 km.) so dropped it off at the dealer this morning. Just got a call from the service writer and said it has a sticky actuator (whatever that is). Luckily not a bad caliper problem. They said that the Super Dutys really need to have their rear brakes inspected and serviced about every 30-40K to avoid problems - especially in our salty winter road area of Ontario.