EngineCritical
AFM/DFM lifter failure with tick and misfire.
- Typically appears
- 80,000+ miles
- What to inspect
- Listen for lifter tick and scan for misfire codes.
2015–2020 GMC Yukon · common problems & known faults
The 4th-gen Yukon shares GM's 5.3L V8, so the AFM lifter and oil-consumption checks are the priority.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed July 2026
Quick answer
The most commonly reported faults on the 2015–2020 GMC Yukon are AFM/DFM lifter failure with tick and misfire, Oil consumption from AFM and Automatic shudder / harsh shifts. Of the documented issues, 1 rated critical and 1 rated high · these are the ones worth inspecting first. Full inspection points, onset mileage and what to check are listed below.
Reliability snapshot
Based on the documented faults on this page for the GMC Yukon.
6.2/ 10
- Critical
- 1
- High
- 1
- Medium
- 1
- Low
- 1
Guidance only · reflects reported patterns, not a specific car's condition.
Known faults to check
EngineHigh
Oil consumption from AFM.
- Typically appears
- 70,000+ miles
- What to inspect
- Check oil level and consumption history.
TransmissionMedium
Automatic shudder / harsh shifts.
- Typically appears
- 90,000+ miles
- What to inspect
- Feel for shudder on light throttle.
InteriorLow
Cracked dashboard.
- Typically appears
- Age-related
- What to inspect
- Inspect the dash top for cracks.
Inspecting a GMC Yukon?
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Check this exact carFrequently asked questions
Is the Yukon reliable?
Durable, but the 5.3L AFM lifter risk is the key concern.
Should I disable AFM?
Many owners fit AFM disablers preventatively; ask if one is installed.
Is the 6.2 V8 better?
The 6.2 is stronger and also uses cylinder deactivation; check history regardless.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.