AFM/DFM lifter failure causing a tick, misfire and lost cylinder.
Inspect · Listen for lifter tick and check for misfire codes; ask about any lifter work.

What the known faults on this Chevrolet Tahoe 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 Chevrolet Tahoe is major mechanical repair at £800–£2,500. Few cars need every repair listed here · treat £2,090–£8,050 as the full exposure if one arrived with all of them.
AFM/DFM lifter failure causing a tick, misfire and lost cylinder.
Inspect · Listen for lifter tick and check for misfire codes; ask about any lifter work.
Harsh ride and knocking over bumps due to Magnetic Ride Control (MagneRide) damper failure.
Inspect · Shine a torch into the wheel arches to check the shock absorber bodies for heavy oil weeping or caked-on dirt. Push down on the vehicle corners to check for excessive stiffness.
Lack of cold air caused by a cracked weld on the A/C condenser.
Inspect · Turn the air conditioning to maximum cold and ensure cold air blows within 60 seconds. Shine a torch through the front grille to look for dark, oily patches on the condenser core.
Water ingress into the cabin due to a degraded roof aerial (shark fin) seal.
Inspect · Press firmly on the headlining around the overhead console and sun visors to feel for dampness or water staining. Test the Bluetooth microphone, as water often shorts the overhead module.
Extremely hard brake pedal at low speeds due to mechanical vacuum pump failure.
Inspect · Start the engine and pump the brake pedal rapidly several times, then hold it. The pedal should remain assisted and not go rock-hard. Listen for a loud ticking from the engine bay.
Oil consumption linked to AFM.
Inspect · Check oil level and consumption history.
6-/8-speed shift quality and shudder.
Inspect · Feel for harsh shifts and shudder.
Cracked dashboard (recall/campaign).
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.