EngineHigh
5.3L AFM lifter failure and oil consumption.
Oil leak trace & seal / gasket£180–£700
Inspect · Listen for a tick/misfire; check oil level and history for lifter work.
2014–2018 GMC Sierra 1500 · common fault repair costs
What the known faults on this GMC Sierra 1500 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.
Cost at a glance
- Most expensive fault
- £180–£700
- Top three risks, from
- £540
- Worst case, everything
- £2,550
The single priciest documented job on the 2014–2018 GMC Sierra 1500 is oil leak trace & seal / gasket at £180–£700. Few cars need every repair listed here · treat £630–£2,550 as the full exposure if one arrived with all of them.
Cost per fault
TransmissionMedium
Torque-converter shudder.
Routine repair£180–£700
Inspect · Test-drive at light throttle for shudder.
HVACMedium
AC condenser failure.
Routine repair£180–£700
Inspect · Confirm cold AC.
InteriorLow
Cracking dashboard with age/sun.
Interior trim repair£90–£450
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.
Inspecting a GMC Sierra 1500 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.