Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2026 Sierra 3500 HD.
The 2026 GMC Sierra 3500 HD represents the latest iteration of the brand's heavy-duty pickup, a model whose owner feedback history stretches back to 1999 and forward through the current model year, encompassing a complaint range from a peak of 108 issues in 2014 down to just one in 2001. With only two owner complaints recorded for the 2026 model year, this generation demonstrates a marked improvement in customer satisfaction compared to the model's historical average, suggesting meaningful refinement over its predecessors despite carrying forward the same platform designation. The top reported concern areas—service brakes, hydraulic, and power train—alongside two recall notices, indicate that while the Sierra 3500 HD has achieved a notably low complaint volume this model year, buyers and fleet managers should monitor these specific systems for any emerging issues, as they represent the primary areas where this vehicle generation has required attention from the manufacturer.
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 3500 HD dominate in one area — the service brakes, hydraulic,power train, 1 of 2 reports (50%), well ahead of the next concern. That matters, because the service brakes, hydraulic,power train are also the target of recall 26V-114 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 0 of the reports describe a crash and 0 a fire — a small share of the total, but worth weighing against the service brakes, hydraulic,power train 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 2 complaints on record, top 2 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 2 of 2 campaigns on record for this vehicle.
General Motors, LLC (GM) is recalling certain 2025-2026 Chevrolet Silverado 3500, and GMC Sierra 3500 vehicles with gasoline engines and dual fuel tanks (RPOs L8T and N2N). The rear fuel pump may not transfer adequate… Remedy: The vehicle's engine control module (ECM) will be updated by a dealer or through an over-the-air (OTA) update, free of charge. Owner notification letters were mailed April 8…
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 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.