Chevy Silverado & GMC Sierra Problems by Year (2007 to 2026): 5.3 AFM Years to Avoid

The Chevy Silverado and GMC Sierra years to avoid are 2007 to 2009 and 2012 to 2013, mainly because of 5.3L AFM lifter failures and transmission shudder. A failed AFM lifter typically costs $4,000 to $5,000 to fix, and more if the engine needs a rebuild. For a used truck, 2015 to 2016 and 2020 to 2022 are the safer buys.

The Silverado and its GMC twin, the Sierra, share the same engines and transmissions, so every problem below applies to both. This guide covers each generation from 2007 to 2026, what the common repairs cost, and how to lower your risk before you buy.

5.3L AFM/DFM Lifter Failure: Why It Happens and What It Costs

Lifter failure is the most expensive common problem on these trucks. Starting with the 2007 Silverado and Sierra 1500 with the 5.3L V8, GM used Active Fuel Management (AFM), which shuts off half of the cylinders at light load to save fuel. In 2019, GM replaced it with Dynamic Fuel Management (DFM), which can shut off more cylinder combinations.

The hydraulic valve lifters that run this system wear and can collapse, especially when oil changes are skipped or the wrong oil is used. A collapsed lifter can bend pushrods and damage other engine parts.

Typical repair cost: $4,000 to $5,000, and more if the engine needs a rebuild.

Failures peaked on 2007 to 2014 trucks with the AFM 5.3L. GMC Sierras with the same engine have the same risk. Early on, GM often blamed owner maintenance when owners filed warranty claims, so oil change records matter when you buy or sell one of these trucks.

2007 to 2013 Silverado & Sierra: AFM Lifters and Transmission Shudder

The first AFM trucks, built from 2007 to 2013, have the highest rate of lifter failures.

They also suffer from transmission shudder in the 4-speed automatic paired with the 5.3L, usually between 80,000 and 120,000 miles. A fluid flush and reprogramming fixed it for some owners. Others needed a full transmission overhaul or replacement, which costs $2,000 to $3,500.

Fuel pump failures are also more common on 2007 to 2012 trucks. The 2007 to 2009 trucks are the most troubled of all. If you are looking at one, have the transmission inspected and ask for proof of regular oil changes.

2014 to 2018 Silverado & Sierra: Oil Consumption & Lifter Updates

GM revised the 5.3L for 2014. Lifter failures dropped but did not disappear.

The new complaint was excessive oil consumption. Some owners had to top off the oil every 2,000 to 3,000 miles with no visible leak. GM traced it to piston rings that did not seat properly in some engines. Trucks under factory warranty got the fix. Out of warranty, the ring repair or an engine replacement costs $3,500 to $4,000.

The 8-speed automatic arrived in some 2014 and later trucks. Early units had programming problems that caused harsh downshifts and shudder, and dealer software updates fixed most of them.

2015 and 2016 are the strongest years of this generation. AFM problems were less common, oil control was better, and the transmission programming was refined.

2019 to 2026 Silverado & Sierra: DFM, the 10-Speed and Newer Trucks

In 2019, GM replaced AFM with Dynamic Fuel Management (DFM), which can shut off more than 4 cylinders. The 10-speed automatic replaced the 8-speed and has been a solid performer.

Some 2019 to 2021 trucks with the 5.3L had engine knock (pinging) complaints, even on 91 or 93 octane fuel. GM linked it to fuel quality and tuning in some trucks and released software updates. If you own one, use Top Tier gasoline (Shell, Chevron, Mobil, Costco) to reduce knock, and ask a dealer whether the updates were done.

The 2020 to 2022 Sierras were especially well received, with fewer documented problems overall.

Trucks from 2023 to 2026 have updated engines and fewer inherited issues so far. Many of them are still young, so check how much factory coverage the truck you are looking at has left.

The 6.2L V8: Fewer Lifter Problems, Lower Fuel Economy

The 6.2L V8 has far fewer AFM/DFM problems than the 5.3L. It is larger, has stronger internal parts, and its cylinder deactivation has held up well in 2019 and later trucks. Pre-2019 6.2L engines had lifter failures too, but at a lower rate than the 5.3L.

The trade-off: fuel economy is usually 2 to 3 MPG worse than the 5.3L, and 6.2L trucks cost more to buy used. If reliability is your priority, the 6.2L is worth the extra cost.

Silverado & Sierra Years to Avoid and Best Years to Buy

Years to Avoid

• 2007 to 2009: the most AFM lifter failures, early transmission problems and uneven build quality.
• 2012 to 2013: continued AFM lifter failures, and transmission shudder is common.

Years to Check Carefully

• 2010 to 2011: the same AFM 5.3L and 4-speed automatic as the years above. Buy only with full service records and an inspection.
• 2014 and 2017 to 2018: oil consumption on some 5.3L engines and early 8-speed shift problems. Look for records of the piston ring fix or normal oil use.
• 2019 to 2021 with the 5.3L: engine knock complaints. Confirm the software updates were done.

Best Years to Buy

• 2015 to 2016: refined AFM system, fewer oil consumption complaints, solid transmissions.
• 2020 to 2022: mature DFM and a proven 10-speed, with fewer documented problems. They cost more, but bring fewer surprises.
• 2023 to 2026: updated engines and fewer inherited issues. Check how much factory coverage is left.

In any year, a 6.2L V8 carries a lower lifter risk than the 5.3L.

Silverado & Sierra Repair Costs to Budget For

Use these ranges to plan a repair budget for the truck's model year and mileage:

Protect the big repairs. Engine and transmission failures like these are what a CoverageX plan is for. The Essential plan covers the engine, transmission and drivetrain, including seals and gaskets, and CoverageX pays the repair shop directly once a claim is approved. Problems that exist before coverage starts are not covered, so the time to get a plan is while the truck still runs well. Enter your truck's year, make, model and mileage to get a quote, or call sales at 1-800-258-3413.

Maintenance That Lowers Lifter and Transmission Risk

Most Silverado and Sierra problems can be prevented or delayed with regular maintenance:

• Change the oil every 5,000 miles, not 10,000, using the oil grade listed in your owner's manual.
• Clean the fuel injectors once a year.
• Change the transmission fluid every 60,000 miles.
• Replace the spark plugs before 100,000 miles.

On a pre-2015 truck with the AFM 5.3L, some owners install an AFM disabler, which keeps all eight cylinders running. It can lower the risk of lifter failure, but it does not fix lifters that are already worn. Check how it affects any warranty or service contract on the truck before you install one.

How to Protect a Used Silverado or Sierra

Even a good year can surprise you with a lifter or transmission failure. A $5,000 lifter repair on a $15,000 truck makes it a $20,000 truck.

• Pick the right year and engine. 2015 to 2016 and 2020 to 2022 have the fewest known problems, and the 6.2L has a lower lifter risk than the 5.3L.
• Have a mechanic inspect the truck and ask for the oil change records.
• Set aside a repair budget based on the cost table above.
• Decide whether a vehicle service contract makes sense for you.

An extended car warranty (legally, a vehicle service contract) is worth a look for a 2015 or older truck with the 5.3L, or any truck past its factory warranty, if one $4,000 to $5,000 repair would strain your budget. It is usually not worth it if the truck still has factory coverage, if you have savings set aside for repairs, or if the truck already has a lifter problem, because problems that exist before coverage starts are not covered.

With CoverageX, you can file claims once coverage is active, 30 days after purchase and after the truck has been driven 1,000 miles. You can use any licensed repair shop, the shop gets approval before work starts, and CoverageX pays the shop directly. Plans range from Essential (engine, transmission and drivetrain) to Executive, which covers everything except the parts the contract lists as excluded. Compare CoverageX auto protection plans, see how to file a claim, or read our guide to extended warranty options for high-mileage vehicles.

Bottom Line: Which Silverado or Sierra to Buy

The Silverado and Sierra are among the best-selling trucks in America, and most years hold up well with good maintenance. Skip 2007 to 2013 unless the price is very low and the records are strong. For a used truck, 2015 to 2016 is the value pick, and 2020 to 2022 is the better choice if your budget allows.

Judge the specific truck, not only the year. Get a pre-purchase inspection, check the service records, and price the big repairs before you sign. The money you save on an older, cheaper truck can disappear with one lifter failure.

Cross-shopping? Compare Ford F-150 common problems by year and Dodge Ram 1500 problems by year, or see our list of the best used trucks.

Found the right truck? Get a quote to see which CoverageX plans fit it, or call 1-800-258-3413.

Silverado & Sierra Problems: FAQ

Which 5.3 AFM years should you avoid?

Avoid 2007 to 2009 and 2012 to 2013 Silverado and Sierra trucks with the AFM 5.3L, unless the price is low and the records are strong. Lifter failures peaked on 2007 to 2014 trucks. From 2015 the system was refined, and failures are less common when the oil was changed on time.

Which Silverado years have AFM lifter problems?

Every Silverado and Sierra with the 5.3L AFM or DFM engine can have lifter problems, but the risk is highest on 2007 to 2014 trucks, where failures often show up between 80,000 and 150,000 miles. On 2015 and later trucks the risk is low if the oil was changed on schedule.

Are GMC Sierra transmissions reliable by year?

Mostly, yes, from 2015 on. The 2007 to 2013 trucks with the 4-speed automatic often develop shudder between 80,000 and 120,000 miles. Early 8-speed units from 2014 had shift problems that software updates mostly fixed, and the 10-speed used from 2019 has been solid. See what a transmission replacement costs.

What is the most expensive repair on a Silverado or Sierra?

The AFM/DFM lifter replacement is the most expensive common repair, at about $4,000 to $5,000, and more if the engine needs a rebuild. Next come the oil consumption repair on some 2014 to 2018 5.3L engines, at $3,500 to $4,000, and a transmission overhaul, at $2,000 to $3,500.

Is a Silverado with 100,000 miles still worth buying?

It can be, if it is one of the better years and has been maintained. Lifter failures on pre-2015 trucks often appear between 80,000 and 150,000 miles, so ask for the oil change records, get an inspection and keep a repair budget. Read what to expect from a used car with 100,000 miles before you decide.

Is the 6.2L V8 more reliable than the 5.3L?

Yes, when it comes to lifter problems. The 6.2L has stronger internal parts and fewer AFM/DFM failures, and its cylinder deactivation has held up well in 2019 and later trucks. The trade-off is fuel economy that is usually 2 to 3 MPG worse and a higher used price.

Does an AFM disabler prevent lifter failure?

No, but it can lower the risk. A disabler keeps all eight cylinders running, so the system does not switch cylinders off. It will not fix lifters that are already worn, and oil changes every 5,000 miles still matter most. Check how it affects any warranty or service contract before you install one.

Is an extended warranty worth it on a used Silverado or Sierra?

It can be for a 2015 or older 5.3L truck, or any truck out of factory warranty, if a $4,000 to $5,000 repair would strain your budget. It is not worth it if you have repair savings, the truck still has factory coverage, or it already has a lifter problem, since pre-existing problems are not covered. The CoverageX Essential plan covers the engine, transmission and drivetrain. Compare plans.