swathdiver
Full Access Member
Is the 5.3L worth considering. I will not be towing anything, but do go into the Colorado mountains a fair amount. I am more concerned about reliability and longevity than power.
Well, there are no 5.3 Denalis and all 5.3s in SUVs in those years have AFM. If you're that concerned with AFM, budget to delete it. Many of us have it turned off in the tune but the parts are still there. Some have deleted it entirely, usually after failure.
You can get a nice SLT with a 5.3 in the later models and save quite a bit over a Denali. Most Denalis are AWD, a very few are 2WD. Have you driven both the Denali with the 6.2 and anything else with the 5.3?