AFM/DFM lifter failure with tick and misfire.
Inspect · Listen for lifter tick and scan for misfire codes.

What the known faults on this GMC Yukon typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
The single priciest documented job on the 2015–2020 GMC Yukon is major mechanical repair at £800–£2,500. Few cars need every repair listed here · treat £1,250–£4,350 as the full exposure if one arrived with all of them.
AFM/DFM lifter failure with tick and misfire.
Inspect · Listen for lifter tick and scan for misfire codes.
Oil consumption from AFM.
Inspect · Check oil level and consumption history.
Automatic shudder / harsh shifts.
Inspect · Feel for shudder on light throttle.
Cracked dashboard.
Inspect · Inspect the dash top for cracks.
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.