Looking at a 2008 Avalanche. Has approximately 4400 hours on dashboard. 11 year old truck with 4400 hours? What's considered too high for my mileage and hours? Truck has 178000 km.
seems that's a lifetime average of about 40 km/hr, which doesn't seem out of line for me. should be a lot of hours left in that motor (depending on the way it was looked after, of course)
If it is a 5.3 with active fuel management just ensure it has had regular oil changes. Some people think that the oil life monitor should be run down to 0% and beyond. I am not a believer of that Maintenance program.