GMC Yukon Denali
6.2L V8, 420 hp, same Gen V architecture as the 5.3 but deeper exhaust note and noticeably more shove. 2021-2024: manufacturing left metal shavings in 597,000 engines — GM's fix was switching to 0W-40 oil. NHTSA opened an investigation into post-recall failures. Same DFM lifter risk as the 5.3. Pre-2021 or confirmed post-recall units with documented oil changes are the buy.
Yukon Denali T1XX 6.2 — IRS luxury, recall cloud
IRS suspension, 420 hp, 15-inch HUD, massaging seats — peak GM luxury SUV. The L87 metal shavings recall (2021-2024) applies. NHTSA investigating post-recall failures. A confirmed post-recall unit is arguably the best full-size SUV value in America. Without that confirmation, it's a $75k gamble.
Engine Weaknesses 4
Manufacturing debris (metal shavings) in engine destroys bearings. 2021-2024 L87. Free engine replacement, 6-8 week wait. NHTSA investigating post-recall failures.
Same lifter issue as 5.3L — cylinder deactivation wears lifters.
Symptoms: Ticking/knocking, misfires, rough running
Piston rings let oil past — 0.5-1 quart per 2,000 miles in severe cases. Also affects 2019-2020 L87 not covered by the machining debris recall. NHTSA investigating these cases separately.
Symptoms: Blue smoke, dropping oil level, fouled spark plugs, positive oil consumption test
Timing chain and guides wear at high mileage — same issue as the 5.3L V8.
Symptoms: Cold start rattle, P0008/P0016 OBD codes
Vehicle Weaknesses 4
GM recalled ~15,000 2021 Yukons with faulty Vitesco fuel pump control module. Engine can stall without warning at any speed. Fix: module replacement.
Same 10-speed shudder as Tahoe/Sierra T1XX. Multiple class actions. Fluid flush with Mobil 1 LV ATF HP helps temporarily.
Digital instrument cluster goes completely dark while driving. Airbag system warnings, speedometer and fuel gauge inoperative. Same issue as Tahoe T1XX.
Defective clearcoat class action: peeling, blistering, microblistering on roof and hood after 2-3 years. Same issue across all T1XX platform GM vehicles.