We Tested 5.3, 6.0 & 6.2 After 200,000 Miles — A Clear Winner

📘 THE 500,000-MILE GMC BLUEPRINT The complete maintenance system for making your gmc last past 500,000 miles. Protect against the $7,000 AFM lifter failure, service your transmission the right way, and decide repair-or-replace with cold math. No mechanic required. 👉 https://everythinggmc.gumroad.com/l/o... ━━━━━━━━━━━━━━━━━━━━━━━━━━━ I'm Dale, twenty-eight years on the bench, and I've had gmc's 5.3, 6.0, and 6.2 apart at 200,000 miles more times than I can count. One of them is barely broken in at that mileage. Another is often already dying. This is what the teardown actually shows. The catch nobody tells you: at 200,000 miles it's not the displacement on the badge that decides what survives — it's the generation underneath it. Two engines wearing the same 5.3 badge can be opposite stories. The early LM7 5.3 and the LQ4/LQ9 6.0 are Gen III iron with no AFM — survivors. The AFM 5.3s and the Gen V direct-injection 6.2s carry the failure modes that end engines early. I'll give you the honest verdict on all three — the clear longevity winner, why the 6.2 still wins on power, why the 5.3 wins on value — plus the one VIN trick that tells you exactly which engine you're holding. Which one's under your hood? Drop it in the comments. Subscribe for the truth the dealer won't tell you — every week. #GMC #GMCTrucks #GMCSierra #LS #6_0 #5_3 #6_2 #AFM #EngineReliability #EverythingGMC