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The 2021 Yukon is much less reliable than other cars from the same model year.
The Reliability score is based on our latest subscriber survey of 2021 GMC Yukon owners. The owner comments describe problems respondents experienced with this vehicle.
Transmission rebuild or replacement, torque converter, premature clutch replacement.
""after 78000 miles, loud whirring noise""
Anonymous, IL (2021 GMC Yukon Denali 6.2-L V8)"My transmission had a sudden failure at just over 100,000 miles out of warranty. It went out suddenly and needed a brand new one due to metal contamination in the pan. The transmission was mainly used for interstate driving."
Anonymous A., LA (2021 GMC Yukon SLT 3.0-L 6 Cyl diesel)Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
"Engine failed while driving in March 2025. Engine was replaced in June 2025."
Anonymous, GA (2021 GMC Yukon Denali 6.2-L V8)"When "active fuel management" was engaged a major vibration was evident in the steering wheel and the drivers seat while the engine was trying to exit "active fuel management" mode. Once the exit was completed the vibration stopped."
Anonymous A., MD (2021 GMC Yukon SLT 5.3-L V8)Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.
""Software update failed, had to replace unit at the cost of $871.00.""
Anonymous A., NY (2021 GMC Yukon SLT 5.3-L V8)AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.
"started 6/1/24 resolved 6/20/24 only once"
Anonymous, MA (2021 GMC Yukon Denali 6.2-L V8)Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.
"I had issues with the check engine lights the dealer could never fix for the life of the vehicle. The main one was an exhaust sensor."
Anonymous A., LA (2021 GMC Yukon SLT 3.0-L 6 Cyl diesel)Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.
Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.
Windows, locks and latches, doors or sliding doors, tailgate, trunk or hatch, mirrors, seat controls (power or manual), seat belts, sunroof, convertible top, glass defect.
Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.
Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.
Alternator, starter, hybrid battery replacement, hybrid battery related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, spark plugs and wires failure, auto stop/start.
Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.
Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.
Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.
Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, USB ports, alarm or security system, remote engine start, heated or cooled seats, heated steering wheel, headlights, automatic headlights, automatic wipers, wireless charging pad.
Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.
GMC Yukon
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"started 2/1/22 not fixed until 4/20/22 would not shift into reverse"
Anonymous, MA (2021 GMC Yukon Denali 6.2-L V8)