on the other hand there could be nothing wrong with it, last year I picked up a Dodge Caravan with 205,000kms that was sitting for 4 years, took it to a friends place cleaned it up, removed the rear wiper install it on the front, pulled the wheels, looked at the brakes, bought a couple of hoses, a new house battery, and a new belt, changed the oil and flushed the rad and took off for Alaska, replaced a tire in Whitehorse, drove another 18,000kms then replaced the water pump $34.00 at the same time i installed that new belt as well as one of the hoses, this year I replaced the rad and replaced the other hose, so you never know it could be perfectly alright and not need anything for awhile. there is no reason to rebuild the whole truck because it sat for awhile a lot depends on where it has been sitting and what kind of climate it is sitting in, good luck.