GMC Sierra 3500HD
The GMC Sierra 3500HD is a heavy-duty pickup truck nameplate from GMC, designed for commercial work, towing and hauling. Across its model years, cab and bed choices, engines, drivetrains, payload, towing ratings and equipment can vary substantially. Shoppers should compare the exact year and trim because specifications, features, recalls, known problems and ownership costs can change over time.
What’s New With the GMC Sierra 3500HD
2027 GMC Sierra HD: New Duramax, More Gas V8 Power and Standard Adaptive Cruise
The 2027 GMC Sierra HD gets an all-new 8.3-liter Duramax diesel with 555 horsepower and 1,230 lb-ft of torque, an updated 6.6-liter gas V8 and new steering and braking hardware.…
Latest GMC Sierra 3500HD Coverage
The newest reporting across every GMC Sierra 3500HD topic.
New 8.0L Ford Power Stroke Diesel Coming by 2029 – Many New Clues Say Yes
Ford’s proposed pickup oil specification and EPA27 strengthen my prediction of a larger Power Stroke by 2029. Could the earlier…
Will red-dyed diesel void your diesel truck’s warranty? It’s murky at best.
Could saving money on red-dyed diesel cost you a diesel truck warranty repair? A reader asked whether putting red fuel…
Two DEF Injectors: GM’s New 8.3L Duramax Emissions System Explained
Two DEF injectors. A redesigned exhaust system. Regeneration you can initiate while parked or driving. There is a lot more…
News
News across GMC Sierra 3500HD model years.
New 8.0L Ford Power Stroke Diesel Coming by 2029 – Many New Clues Say Yes
Ford’s proposed pickup oil specification and EPA27 strengthen my prediction of a larger Power Stroke by 2029. Could the earlier…
Two DEF Injectors: GM’s New 8.3L Duramax Emissions System Explained
Two DEF injectors. A redesigned exhaust system. Regeneration you can initiate while parked or driving. There is a lot more…
How GM’s New 8.3L Duramax Stacks Up Against Ford and Ram
GM’s new 8.3L Duramax leads Ford and Ram in rated output. Compare all three HD diesels and see what the…
Comparisons
Head-to-head comparisons featuring GMC Sierra 3500HD.
How GM’s New 8.3L Duramax Stacks Up Against Ford and Ram
GM’s new 8.3L Duramax leads Ford and Ram in rated output. Compare all three HD diesels and see what the…
GMC Sierra 3500HD Videos
Videos associated with GMC Sierra 3500HD model-year coverage.
Recalls
Recent safety campaigns and repair information.
2018-2019 Chevrolet Silverado 1500/2500/3500, GMC Sierra 1500/2500/3500 Recall: 2.7K Roof Rail Airbag Issue
A recall for 2,785 2018-2019 Silverado 1500/2500/3500 and GMC Sierra 1500/2500/3500 vehicles due to an issue with roof-rail airbags. General…
2025-2026 Chevrolet Silverado 3500, GMC Sierra 3500 Recall: 12K Faulty Rear Fuel Pump
A recall for 11,787 2025-2026 Chevrolet Silverado 3500 and GMC Sierra 3500 pickups over issues with rear fuel pump. GM…
Reliability & Engine Coverage
Engine reporting, engineer interviews and ownership coverage.
Will red-dyed diesel void your diesel truck’s warranty? It’s murky at best.
Could saving money on red-dyed diesel cost you a diesel truck warranty repair? A reader asked whether putting red fuel…
Two DEF Injectors: GM’s New 8.3L Duramax Emissions System Explained
Two DEF injectors. A redesigned exhaust system. Regeneration you can initiate while parked or driving. There is a lot more…
2027 GM HD 6.6L gas V8: More power, better cooling and no dipstick
With all the attention on GM’s new 8.3L Duramax, I did not want the gas engine to get lost in…