VERDICT · STRONGER TOWING, SAME FAMILY TRAITS AS THE 5.3L
GMC Sierra 1500 6.2L
is it a safe used buy?
The top-trim engine on this Sierra generation — shares its small-block architecture and AFM lifter consideration with the related 5.3L.
GENERATION3rd gen Denali (2014–2018)
ENGINE6.2L
POWER420 hp
USED PRICE$30,000–38,000
How the engine fits this car
The top-trim engine on this Sierra generation — shares its small-block architecture and AFM lifter consideration with the related 5.3L.
Reserved for Denali and similar top trims, which means a fuller features list alongside the stronger engine.
GMC Sierra 1500-specific pros and cons
This is about the car itself — for engine-specific failure points, see the dedicated engine page below.
WHAT HOLDS UP WELL
- Meaningfully stronger towing and payload capacity than the 5.3L
- Shares the proven small-block bottom end and reliability data with the 5.3L
- Reserved for top trims, typically bundled with a fuller features list
- Enormous parts availability given the shared GM architecture
WHAT TO WATCH
- AFM lifter wear, the same concern documented on the 5.3L, applies equally here
- Fuel economy is lower than the 5.3L
- Purchase price runs meaningfully higher
- Rust can appear on frame components in regions that salt roads
Pricing on the used market
Mileage band
Typical price
What to expect
Under 70,000 mi
$35,000–38,000
Later production, often fully loaded
70,000–120,000 mi
$32,000–35,000
Sweet spot, verify AFM lifter history
120,000+ mi
$30,000–32,000
Budget for lifter work if not already addressed
Pre-purchase checklist for this generation
Listen for AFM lifter tapping at idle.
Inspect the frame and underbody for rust.
If used for towing, inspect transmission behaviour under load during the test drive.