I am looking at upgrading my 2015 Silverado 5.3l with 190,000 km’s(118,000 miles) without any issues . I have come across 2 trucks that I am interested in. A 2025 elevation with the 3.0 Duramax, with 20,000 km(12,500 miles) and a 2024 elevation with 10,000 km(6000 miles). I see lots of posts praising the better fuel efficiency of the 3.0, but what about longevity? I keep my vehicles for 10-12 years and average 200,000kms. I know the 5.3 is tried and true, but has some lifter issues. Will the Duramax last me 10-12 years? I am fairly meticulous with routine maintenance ( oil changes, transmission fluid changes). Any input on the longevity of these engines would be appreciated.
I drive about 20,000 km per year. About 50/50 city/ highway, my daily commute to work is 25 km( 15 miles) each way.