decode the rpo codes in the glovebox. lots of info online for how to do it, and what the codes mean. The codes include what the diff ratios are, as well as all the other options the truck was built with. That info is also useful for buying the right parts for that particular truck.
Get a code reader to see what codes are present.
I would keep and fix it. It has relatively low miles, the engine and transmission are very reliable, but not great MPG using it as a DD. Transmission is probably good for another 50-100k, and the engine well over that, assuming they both have had regular maintenance.
Transfer case also works well, it's primary issue is "gm pump rub", where a hole is rubbed in the case and fluid drains out while you are driving, but not generally apparent when stopped, so you find out it happened when it starts making bad noises. You can install a fix for it, it's cheap, but you have to remove/reinstall the TC to do it.
It'll handle the atv's and hauling a trailer, the owners manual includes a table for what it can tow (you'll have to figure out the right entry, based on the options the truck came with). PDF is a free download from GM's website.
I use a '04 3500 extended cab, cab & chassis as a daily driver, hauling a trailer of equipment around, and it does fine and has been pretty reliable, just passed 340k km (211k miles) and still going strong. I installed a rebuilt transmission at about 210k km, but only because I was upgrading the truck to 4wd, the original transmission was still working fine.
Get a code reader to see what codes are present.
I would keep and fix it. It has relatively low miles, the engine and transmission are very reliable, but not great MPG using it as a DD. Transmission is probably good for another 50-100k, and the engine well over that, assuming they both have had regular maintenance.
Transfer case also works well, it's primary issue is "gm pump rub", where a hole is rubbed in the case and fluid drains out while you are driving, but not generally apparent when stopped, so you find out it happened when it starts making bad noises. You can install a fix for it, it's cheap, but you have to remove/reinstall the TC to do it.
It'll handle the atv's and hauling a trailer, the owners manual includes a table for what it can tow (you'll have to figure out the right entry, based on the options the truck came with). PDF is a free download from GM's website.
I use a '04 3500 extended cab, cab & chassis as a daily driver, hauling a trailer of equipment around, and it does fine and has been pretty reliable, just passed 340k km (211k miles) and still going strong. I installed a rebuilt transmission at about 210k km, but only because I was upgrading the truck to 4wd, the original transmission was still working fine.