While driving I have noticed a noise from the exhaust.
It happens when I ease off the pedal and start to maintain speed, A loud, deep,humming noise from the exhaust area or rear of the truck.
Anybody else noticed this?

 

This morning I noticed that my heater didn't warm up as fast as it normally does so I started fololing with it on my way to work, never did warm up.
Guess I will take it to the dealer today or tomorrow.

 

Well, took it to the dealer.
The reason the heater wasn't heating was because there was a leak in the radiator hose quick connect and I was 2.5 gallons low on coolant.
They filled her back up and orderd a new hose,said I could drive it till it came in.
I was suprised because when the heater quit I ran the diagnostic computer scan and it said the cooling system was ok.
Don't know about the exhaust yet.

 

Hope it is not your Radiator!

 

YEA, Service man said it was in the hose connection.
I haven't noticed any leaks but my wife has been driving it mainly for the last week or so.
I plan to park it in the driveway when its hot and take a look myself.

 

Well, I found that my coolant had been leaking again so I took it back to the dealer. they said that they were going to order me a new radiator.

When I wen't to have it put on they told me that they were replacing allot of 6.4 radiators but after the second one the were not comoing back.
Haven't had anymore problems since. They also said the noise I'm hearing is normal, I doint know?

 

The radiator is a common problem. I just had one of them replaced on mine too. I guess the plastic cracks on the ends and leaks.