What ownership is like, what breaks at what mileage, what the repairs cost, and what to check before you buy one.
← All GMC Sierra 1500 generations
NHTSA complaints per catalog listing run from 0.34 for 2025 (124 complaints across 367 listings) to 2.66 for 2019 (658 across 247). The generation median is 1.73. No year reaches twice the median: the highest, 2019, is 1.5 times it. Our data has no enriched-ad count for 2025 or 2026, and the newest model years have had little time to collect complaints, so their low figures say little yet. The top complaint area is the engine in every year, which lines up with the recalls and lifter reports below.
| Miles | Item | Cost | Notes |
|---|---|---|---|
| some reports within the first 20K miles on 2020+ trucks (Rohnert Park Transmission, Silverado page); others later | AFM/DFM lifter failure on the 5.3L/6.2L (2019 and later) | $2,600-$4,800 on a 2020 Silverado (avturo, independent shop; shared GM platform); $3,000-$4,500 both banks (Capital Motorcars). Rohnert Park Transmission gives no price. Autos of Chicago's 2027 guide covers 5.3L/6.2L trucks from both brands. | Cylinder deactivation is now called DFM (dynamic fuel management) on newer trucks. Listen for a tick at a cold start and scan for misfire codes. Anything under warranty is a dealer matter; ask what coverage is left. |
| Not verified | 10L80 ten-speed automatic: harsh shifts and bulletins | Rebuild $3,000-$4,500 (Transmission Repair Cost, Silverado page; shared GM platform). | Transmission Repair Cost says the unit is too new for a definitive reliability profile and that bulletins suggest harsh-shift complaints similar to Ford's 10R80. Mostly a warranty question on newer trucks. |
| any | 6.2L V8 connecting rod and crankshaft recall (25V274000, 2021-2024) | Free at a GMC dealer when open | GM says connecting rod or crankshaft components on certain 6.2L gas V8 trucks, including the Sierra 1500, may have manufacturing defects that can lead to engine damage and failure. Check the VIN; this applies only to the 6.2L. |
| any | Diesel transmission control valve recalls (24V797000, 26V083000, 2020-2022 diesel trucks) | Free at a GMC dealer when open | The transmission control valve may fail and cause the rear wheels to lock up; 26V083000 (February 2026) covers trucks that may have been repaired incorrectly under 24V797000. Both name the Sierra 1500. Applies to diesel trucks. |
| any | Other recalls: driveshaft (20V650000), fuel pump (19V837000), transfer case (26V289000) | Free at a GMC dealer when open | 20V650000 (2019-2020): a driveshaft joint may not have been properly welded and the shaft can separate. 19V837000 (2020): the fuel pump may be missing a pressure regulator. 26V289000 (2026, 4WD/AWD): a missing transfer case component may lock the wheels. All three name the Sierra 1500. |
No year in this generation was flagged. A year is flagged by our rule only when all three hold: (1) its NHTSA complaints per catalog listing is at least 2.0x the median for its generation, (2) the share of ads that mention a problem is above the generation median, and (3) we track at least 30 listings for that year. The cutoff was fixed before we looked. Ad mentions are not failures, and a flag is a reason to inspect harder, not a verdict on any one car.
| Year | Complaints | Top components | |
|---|---|---|---|
| 2019 | 658 | Engine, Power Train, Service Brakes | |
| 2020 | 484 | Engine, Power Train, Electrical System | |
| 2021 | 598 | Engine, Power Train, Engine And Engine Cooling | |
| 2022 | 603 | Engine, Structure, Power Train | |
| 2023 | 503 | Engine, Structure, Power Train | |
| 2024 | 378 | Engine, Power Train, Engine And Engine Cooling | |
| 2025 | 124 | Engine, Power Train, Electrical System | |
| 2026 | 81 | Engine, Power Train, Electrical System,engine |
source: NHTSA complaints database (api.nhtsa.gov). Complaints are owner reports, not confirmed failures.
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We don't tell you to skip a year; we flag by a fixed rule (see 'Years flagged' in each generation), and no Sierra 1500 year trips it. The closest calls: 1999 has 30.32 NHTSA complaints per catalog listing (758 complaints across 25 listings) against a Gen 1 median of 5.46, but 25 listings is below the 30 our rule needs. 2000 is 2.6 times the median but 8 of 35 enriched ads (22.9%) mention a problem against a 25.3% median, so it fails the second test. 2014 sits at 2.74 per listing against a Gen 3 median of 1.42, 1.9 times, just under the 2.0 cutoff. Ad mentions are not confirmed failures.
It depends on the engine and generation. Gen 1 (1999-2006): rusted brake lines and 4L60E wear. Gen 2 (2007-2013): AFM lifter failure and oil consumption on the 5.3L, and the 6L80 automatic. Gen 3 (2014-2018): the 8-speed shudder, lifters, and recalls for power steering assist and brake vacuum. Gen 4 (2019 on): lifter reports, 10-speed shift complaints, and recalls. Each is priced, with sources, in the generation sections.
Avturo puts a 5.3L/6.2L lifter job at $2,600-$4,800 at an independent shop. Capital Motorcars gives $3,000-$4,500 for lifters on both banks, and Autos of Chicago gives $3,200 for a lifter repair against $7,000+ for an engine overhaul if a ticking lifter is ignored. Those prices come from Silverado-focused pages; the engine is shared, but they are shop figures, not a quote for your truck.
Owners and shops report a shudder under light throttle on 8L90 trucks (2015-2019). Transmission Repair Cost, writing about the Silverado, says GM handled it with bulletins and a class action settlement; the usual fix is the updated fluid and a reflash ($400-$700 dealer, $300-$500 independent), then a torque converter ($1,200-$2,200 independent, $1,800-$2,800 dealer) if it persists. We don't have a failure rate, only these reports. Ask for the VIN's service history.
We don't have a mileage figure we could verify from two sources, so we won't give one. What we can show: lifter failure is reported before 100K miles on some trucks and not on others (Marin Mazda reports owners at 180K-220K with no major issues), and the 6L80 wave plate is reported at 100K-150K miles (one source). Service records tell you more than the odometer.
Mechanically close. CarBuzz and Wikipedia describe the Sierra as the Silverado's twin from 1999, sharing platforms (GMT800, GMT900, K2XX, T1XX) and engines. GMC numbers its generations differently, because the Sierra name began in 1988, so the 1999 truck is its second generation. That is why many of the repair prices here come from Silverado sources.