K2XX Silverado & Sierra (2014–2018)
The K2XX — 2014 to 2018 Chevy and GMC full-size trucks and SUVs — brought the EcoTec3 5.3L and 6.2L V8s, 6L80/8L90 transmissions, and a more modern truck with its own AFM/DFM concerns. This hub covers engine choice, bolt-ons, wheels, and suspension. Neighboring generations: the GMT900 (2007–2013) and T1XX (2019–present) hubs.
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Engine choice & AFM/DFM
A flashing check engine light on an AFM or DFM truck is worth stopping for, not driving through. Look the code up in the Silverado trouble code index before you assume lifters.- 5.3L vs 6.2L Silverado: Which Engine Should You Choose?
- AFM / DOD in Chevy & GMC Trucks
- AFM Delete Guide for the 5.3: Kits, Cost & Tune
- 5.3 Ticking Noise: How to Diagnose It Before Throwing Parts
Bolt-ons: intake & exhaust
Wheels, tires, lift & accessories
- Best Wheels for Silverado: Bolt Pattern, Offset & Fitment
- Best Lift Kit for Silverado
- Best Tonneau Cover for Silverado
Owner tools for your K2XX
Free, no sign-up. On a K2XX the option list decides half the parts you end up buying.- GM RPO Decoder — type the option codes off your glove box sticker, or photograph the label and let the page read it. Confirms axle ratio, AFM/DFM, trailering package and trim before you order anything.
- GM RPO Code Database — every option code we hold, searchable by code or by plain description, and filterable to your model year.
- MPG Calculator — miles, gallons, engine. You get your number and where it sits against everyone else running the same engine.
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Repair, modification, compatibility and specification information on FullSizeChevy.com is provided for general informational purposes only. Always verify procedures, torque values, parts fitment and safety requirements for your exact vehicle using factory service information before performing work. Repairs and modifications are performed at your own risk.