The GMC Sierra 1500 is the upmarket twin to the Chevy Silverado, sharing the L83/L86 V8s and 8L90/10L80 automatics. The 2017-2018 K2XX Sierras are the most refined and least troublesome modern half-ton.
Buy: 2017-2018 Sierra 1500 SLT (5.3L L83 with 8L90)
Avoid: 2014 launch and 2019 T1XX redesign
Scores 1-10 based on NHTSA complaint volume, severity of reported issues, recall history, and class-action exposure. Higher is better.
| Year | Score | Summary | Top 3 Problems | Verdict |
|---|---|---|---|---|
| 2014 | 6.5/10 | K2XX launch. AFM lifter and shift quality issues peak. | · AFM lifter ($2500-4500) 6L80 shift IntelliLink crashes |
CAUTION |
| 2015 | 7/10 | Year 2. New 8-speed brings shudder. | · AFM lifter 8L90 shudder HVAC actuator |
CAUTION |
| 2016 | 7.5/10 | Continued updates. | · AFM Shift shudder Power liftgate |
CAUTION |
| 2017 | 8.5/10 | Best K2XX year. Refined 8L90, mature L83. | · Minor AFM HVAC actuator Battery drain |
BUY |
| 2018 | 8.5/10 | Final K2XX year. Few complaints. | · AC compressor Power liftgate HVAC actuator |
BUY |
| 2019 | 6/10 | New T1XX. MultiPro tailgate problems, infotainment issues. | · Tailgate hinge wear Interior plastics Software glitches |
AVOID |
| 2020 | 7/10 | Year 2 of T1XX. Some updates. | · Tailgate hinge Recall 20V-318 trailer brake Software |
CAUTION |
| 2022 | 8/10 | Refresh year. Interior overhaul. Most refined T1XX. | · Minor electronics 10L80 (improved) Diesel emissions |
BUY |
The L83 with the fully-updated 8-speed automatic is the most reliable Sierra of the modern era. AFM lifter risk is the only real concern, easily mitigated.
More on this issue →Cylinder-deactivation lifters collapse and ruin the camshaft. Aftermarket AFM disabler modules ($150-250) prevent it.
More on this issue →Shudder under light throttle. GM Bulletin 18-NA-355 fluid flush usually fixes.
More on this issue →Hinge pivots wear, gate sags or wont latch. Multiple TSBs issued. Class action filed in 2022.
More on this issue →Same blend-door actuator that affects Silverado/Tahoe. Replacement is straightforward.
More on this issue →Integrated trailer brake controller software issue. Affects some 2020 Sierra/Silverado. Dealer reprograms.
More on this issue →Run a $5.99 AI diagnosis tailored to your exact vehicle. Get the most likely cause, repair estimate, and OBD2 code interpretation in under 30 seconds.
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The 2017-2018 Sierra 1500 is the best used pick. Mature K2XX platform, refined 8-speed, before the 2019 redesign brought new-platform problems.
The 2019 was the first T1XX year and had elevated complaint volume - MultiPro tailgate hinge wear, interior plastic quality, and software glitches. Buy 2022 or later if you want a redesigned Sierra.
Mechanically identical. The Sierra has upmarket trim, the MultiPro tailgate, and AT4 off-road package. Reliability is the same.
A maintained Sierra with the L83 V8 reaches 250,000+ miles. AFM lifter management is the lifespan limit.
Hinge pivots and latches wear early. GM has issued multiple TSBs. A class action was filed in 2022 alleging premature failure.
The L86 6.2L has the same AFM issue but is generally more lightly stressed. It is more durable long-term but more expensive.