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.
- Typical repair
- Major mechanical repair · £800–£2,500
Is the 2015–2020 GMC Yukon reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
2.9/ 10
Buy with cautionOn our documented-fault scoring the GMC Yukon rates 2.9 out of 10 · buy with caution. We hold 8 known faults for it and 1 of them are rated critical and 3 high, so a bad example can be expensive. The weak points cluster around engine, transmission and interior. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Walk unless the history is spotless
What the score is built from
- Critical
- 1
- High
- 3
- Medium
- 3
- Low
- 1
Weak points cluster around engine, transmission, interior, suspension.
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Check this carThe faults that decide it
EngineHigh
Oil consumption from AFM.
- Typically appears
- 70,000+ miles
- What to inspect
- Check oil level and consumption history.
- Typical repair
- Oil leak trace & seal / gasket · £180–£700
SuspensionHigh
Extremely harsh ride and bouncing due to Magnetic Ride Control (Magneride) shock absorber failure.
- Typically appears
- 50,000-80,000 miles
- What to inspect
- Look behind the wheels at the shock absorbers for heavy oil residue. Push down firmly on the front wings; a lack of rebound or excessive stiffness indicates failed, locked-up dampers.
- Typical repair
- Suspension refresh (per axle) · £250–£1,100
BrakesHigh
Hard brake pedal and loss of braking assistance at low speeds caused by mechanical vacuum pump failure.
- Typically appears
- 60,000-100,000 miles
- What to inspect
- Start the engine and pump the brake pedal several times rapidly at idle. If the pedal becomes rock hard and loses servo assistance during these low-speed manoeuvres, the pump is failing.
- Typical repair
- Brakes (discs, pads, caliper) · £200–£800
TransmissionMedium
Automatic shudder / harsh shifts.
- Typically appears
- 90,000+ miles
- What to inspect
- Feel for shudder on light throttle.
- Typical repair
- Routine repair · £180–£700
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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