Chevrolet Silverado: 6.2 V8 lifter failure — ticking, misfire and in the worst cases a new engine

The 6.2 V8 in this Silverado has a well-documented lifter problem. The cylinder deactivation system shuts down cylinders to save fuel, and the lifters involved collapse or wear, which upsets the valve timing and produces a ticking or knocking from the valve train, misfires and sudden power loss. Symptoms frequently appear early — within the first 30,000 km on affected trucks — rather than at high mileage, so a low-kilometre example is not automatically safe. At the severe end, NHTSA documentation describes engines failing outright from debris in the oil passages and out-of-specification connecting rods and crankshafts, with some requiring a replacement block. The gap between "replace some lifters" and "replace the engine" is enormous, which is why a ticking noise on one of these is worth stopping for rather than negotiating around.

• Ticking, tapping or knocking from the top of the engine
• Misfire, or the engine shuddering and losing power
• Engine warning light, often with random misfire or oil pressure codes
• Noise worsening with mileage rather than settling
• Excessive oil consumption between services

Be there for a stone-cold start and stand at the front with the bonnet up — this is the check that matters and a warm engine masks it. Listen to the first ten seconds for a ticking or tapping from the top of the engine, then keep listening as it settles, because a tick that persists once warm is the finding rather than one that clears. Let it idle to full temperature and listen again with the bonnet up, moving from one side of the engine to the other. On the drive, accelerate gently and firmly in turn and note any shudder, misfire or momentary loss of power. Watch the dash throughout for an engine warning light and treat a flashing one as a reason to stop. Check the oil level and colour, and ask how much oil the truck uses between services. Ask directly whether the lifters, camshaft or engine have ever been worked on and ask to see invoices — on this engine that is a normal question, and a documented repair is worth real money. If a workshop inspection is possible: have the stored misfire counters and oil pressure data read before agreeing a price.

$3,000 to $15,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Is there any ticking from the engine, cold or warm?”
• “Have the lifters, camshaft or engine ever been repaired or replaced?”
• “How much oil does it use between services?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.