2003 duramax with 267xxx miles. Have done a lot of work to it. Has a new alternator, power steering pump, ac compressor and accumulator, fan clutch, updated tranny cooler lines so no more of the leaky metal to hose lines, thermostats, coolant flush, new tranny oil and filter at 260xxx, had it in to get the 4wheel drive fixed which encased in new encoder motor and front diff actuator, new brake fluid, and just changed the oil. And new batteries. Can send a video of no blow by it wont let me upload it.