Looking at 2015 GMC Denali with 93,000 miles. Are the later versions as trouble some as the earlier models? I have already had a 2010 that had lifters replaced. Found a real nice truck I am a little hesitant about the engine.
The newer generation seems to do a bit better, we don't see as many of them come into the dealership with AFM issues. You could always get a Range AFM disabler, they work well and a lot of people say it actually improves fuel mileage. They just plug into your OBD2 port to work, if you want to use your AFM system again you just unplug it.
A forum community dedicated to all General Motors truck owners and enthusiasts. Come join the discussion about performance, lift kits, wheels, tires, modifications, troubleshooting, maintenance, and more!