The Chevy Silverado has been the second best-selling truck in America for decades, but the 2014-2018 5.3L L83 V8 has one of the most expensive failure modes in modern truck history: AFM lifter collapse. Knowing which years to avoid can save you $4,000-8,000.
The 2014-2018 5.3L L83 V8 with Active Fuel Management (AFM) is the most problematic Silverado engine ever - lifter failures are catastrophic and expensive. The 6.2L L86 is far more reliable.
The Active Fuel Management lifters collapse, destroying camshafts and sometimes the entire engine. The most common Silverado complaint by a wide margin. AFM disable tuners and lifter replacement kits are common workarounds.
View P0300 Diagnosis →Earlier AFM-equipped 5.3L engines burn oil at an alarming rate due to piston ring design and AFM oil pressure relief valve issues. A class-action settlement was reached.
View P0521 Diagnosis →The 8-speed automatic shudders on light acceleration. GM fluid flush bulletin helps, but some require full transmission service or replacement.
View P0700 Diagnosis →Common AC condenser leak around 50-80K miles, often affecting the entire AC system. Symptoms: gradual loss of cooling, low refrigerant.
Run free diagnosis →Sun exposure causes the dashboard to crack on GMT900 Silverados. Cosmetic but very common. Aftermarket dash covers are the popular fix.
Run free diagnosis →Slide pins seize in the calipers, causing uneven pad wear and pulling under braking. Common in salt-belt states.
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2014-2018 with the 5.3L L83 (AFM lifter failure is a $4,000-8,000 risk), 2010-2014 5.3L AFM (oil consumption class action)
2019+ with the 5.3L L84 (AFM/DFM redesigned and more reliable), or any year with the 6.2L L86 V8 (avoids AFM issues), and the new 6.2L L87 in 2019+.
Expect $800-1,300/year for maintenance, plus a major repair (lifters, transmission, or AC) likely once during ownership. Lifetime non-routine: $5,500-12,000.
If your Silverado is throwing a check engine light, these are the codes most often associated with the problems above. Click any code for full diagnosis steps and typical repair costs.
Only if you avoid the 2014-2018 with the 5.3L L83 V8 unless lifters have already been replaced. The 6.2L L86 V8 versions are excellent. The 2019+ redesigned trucks have improved AFM reliability.
For value: a 2019+ Silverado with the 5.3L L84 (DFM redesigned) or the bulletproof 6.2L L86. For older trucks, look at 2007-2009 with the 6.0L (no AFM issues) or any year with the 6.2L V8.
Active Fuel Management deactivates 4 of 8 cylinders to save fuel. The lifters that enable this fail catastrophically, destroying the camshaft and often the engine. Repair runs $4,000-8,000+. Disabling AFM with a tune is a popular preventive measure.
The 2014-2018 5.3L L83 has serious AFM issues. The newer 5.3L L84 (2019+) and older 5.3L LMG (2007-2013, non-AFM) are much more reliable. Avoid the 2014-2018 unless lifters have been redone.
A Silverado without AFM issues can hit 250,000+ miles. With AFM lifter failure, the engine often does not make it to 150,000 without major work.