Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2026 Sierra 2500 HD.
The 2026 GMC Sierra 2500 HD is a heavy-duty pickup in GMC's long-running Sierra 2500 HD line, a range tracked from 1999 through 2026, and early owner feedback records just six complaints and one recall, with the Electrical System standing out as the top reported concern. That complaint total is among the lowest in the model's documented history, which spans from a high of 147 complaints in 2015 to a low of one complaint in 2024. With so few reports on file, the 2026 model currently sits near the bottom of the Sierra 2500 HD complaint range, meaning there is little owner-reported trouble data to flag at this stage.
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 2026 GMC Truck Sierra 2500 HD dominate in one area — the electrical system, 2 of 6 reports (33%), well ahead of the next concern. None of this vehicle's 1 recall campaigns target the electrical system, so those reports read as owner-reported wear-and-tear rather than an acknowledged defect. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the electrical system pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 6 complaints on record, top 5 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 1 of 1 campaigns on record for this vehicle.
General Motors has decided that certain 2027 Chevrolet Bolt EV, 2025-2026 Cadillac OPTIQ, Chevrolet Colorado, Equinox EV, GMC Canyon, 2026 Buick Enclave, Envision, Cadillac CT5, Escalade, Escalade ESV, Escalade IQ… Remedy: Dealers will reset the vehicle radio, which will facilitate automatic download of the electronic owner’s manual, free of charge. Owner notification letters were mailed April 16…
Showing 5 of 146 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| PIT6473F | 2026-07-17 | Unknown Or Other | This PI was created to help avoid unnecessary front camera module replacements |
| PIT6532 | 2026-07-06 | Unknown Or Other | The purpose of this PI is to inform dealer technicians of a normal cab pressure relief… |
| PIT6531 | 2026-06-29 | Unknown Or Other | This preliminary information communicates an issue with aftermarket LED lighting causing… |
| PIT5544J | 2026-06-24 | Unknown Or Other | This Preliminary information communicates information on a hydraulic rush type noise from… |
| PIT5966F | 2026-06-23 | Unknown Or Other | This Preliminary information communicates an issue with an OTA pending message still… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Cross-vehicle references for the kinds of data on this page.
NHTSA lists 1 recall campaign(s) for this model year. Check your specific vehicle by VIN.