Overall the truck has been good. But 5 injectors and drivers seat adjust mech (under warranty, but still truck is down) instrument panel cluster is a joke. Whole companies are devoted to rebuilding IPC on all makes. So once again truck is down while you get to pay $500 for a rebuilt defective IPC. (GM has announced they will pay for this but we have seen no money). OnStar was good for unlocking doors and diagnosing ground faults on several glow plugs. Once the "free" runs out it is easier to hide an extra key. OS's peace of mind comes at a cost. If you can afford an expensive truck then be prepared for expensive upkeep. It is a good and powerful work truck
Climate control, towing capacity.
An IPC that works more than 2000 hrs. Injectors ($1000 per installed) that work. From new we had problems with injectors. A warranty that demonstrates to loyal customers that GM has confidence in their ability to build a quality vehicle.