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2026 GMC Sierra 3500HD

Heavy-duty pickup
0 EPA-rated configurations
Data refreshed 2026-10-26

Safety Signal

89 / 100 from the NHTSA recall record

RecallsNHTSA campaigns 2

Complaintsnone reporting a crash, fire or injury 5

Crash ratingnot rated by NHTSA —

2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016

The 2026 GMC Sierra 3500HD is a pickup truck; vehicles over 8,500 lb GVWR are not certified for fuel economy by the EPA, so this page is built from NHTSA's recall, complaint and investigation records. NHTSA lists 2 recall campaigns for this model year, which gives it a Safety Signal grade of B. Owners have filed 5 complaints, most often about the power train.

GMC Sierra — photograph via Wikimedia Commons — GMC Sierra · Photo: Ethan Llamas · CC BY-SA 4.0 · Wikimedia Commons

Specs & fuel economy

Source: EPA fueleconomy.gov

No EPA fuel-economy record: the EPA does not certify vehicles over 8,500 lb GVWR. Recall, complaint and investigation data below come from NHTSA.

Specifications filed with NHTSA

Source: NHTSA vPIC

Dimensions Exterior

Body style	Incomplete
GVWR class	Class 3: 10,001 - 14,000 lb (4,536 - 6,350 kg)

Engine Basics

Cylinders	8
Displacement	6.6 L
Engine configuration	V-Shaped

Fuel Economy

Fuel	Diesel

Transmission

Drivetrain

4WD/4-Wheel Drive/4x4

Driver assistance

Standard: Anti-lock brakes, Electronic stability control, Forward collision warning

Optional: Parking assist, Rear cross-traffic alert

Filed by the manufacturer with NHTSA under the federal vehicle-identification rule and decoded from the VIN pattern — not a manufacturer press kit, so it describes the configurations we could identify rather than every trim (seen: AT4, Denali, Pro). Figures for the trim you are looking at may differ.

Dimensions & weight

Source: Transport Canada

Length	235.4–266.1 in
Width (body, without mirrors)	81.9 in
Height	79.9–80.7 in
Wheelbase	141.7–172.0 in
Track, front	67.3 in
Track, rear	68.1 in
Curb weight	6,338–7,172 lb
Weight distribution, front/rear	57/43

Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here 14 configurations: Crew Cab L/Box Drw 2WD, Crew Cab L/Box Drw 4X4, Crew Cab L/Box Srw 2WD, Crew Cab L/Box Srw 4X4, Crew Cab M/Box 2WD, Crew Cab M/Box 4X4 …. Where a range is shown, those versions differ. Width is the body without mirrors, which is why it can read narrower than a brochure figure. Before we used it we checked it against the US manufacturer press kits we hold (27 Sep 2026): wheelbase agreed within 1% on every vehicle we could compare, length on 98%, and the curb weight fell inside the manufacturer's range on 96%. Source dataset. Contains information licensed under the Open Government Licence – Canada. Licence.

New-vehicle warranty

Source: manufacturer press kits, make-level

Basic 3 yr / 36,000 mi Powertrain 5 yr / 60,000 mi Roadside 5 yr

As stated in GMC's press kits for the 2026–2027 model years (6 kits); this model year's own kit states no warranty terms, so the make's are shown. Confirm the term for this car with the dealer.

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Recalls (2)

Source: NHTSA recall database

▲high

Fuel System, Gasoline

N262544420

11,807 vehicles 78% reported repaired built Aug 19, 2025 – Mar 4, 2026

Problem 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 fuel to the front tank, causing an engine stall. Risk An engine stall increases the risk of a crash. Fix 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, 2026. Owners may contact GMC customer service at 1-800-462-8782 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is N262544420. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on March 5, 2026.

Filed with NHTSADefect report PDF Owner letter PDF Remedy instructions PDF

NHTSA campaign 26V129000 reported Mar 5, 2026 General Motors, LLC the full filing, and every vehicle covered →

○minor

Equipment

N252540430

5,861 vehicles 74% reported repaired built Dec 9, 2025 – Dec 9, 2025

Problem 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, Escalade IQL, LYRIQ, VISTIQ, Chevrolet Blazer EV, Corvette Convertible, Corvette Coupe, Corvette Convertible E-Ray, Equinox, Silverado 1500, 2500, 3500, Silverado EV, Suburban 1500, Tahoe, Traverse, GMC Acadia, Hummer EV Pickup, Hummer EV SUV, Sierra 1500, 2500, 3500, Sierra EV, Terrain, Yukon, and Yukon XL vehicles. The radio may not have been set to the correct status to download the electronic owner's manual during production. As such, these vehicles fail to comply with the req Risk Without an owner's manual to consult, owners may not know how to safely use and operate the vehicle, increasing the risk of injury in a crash. Fix 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, 2026. Owners may contact GM customer service at 1-866-467-9700, Chevrolet customer service at 1-800-222-1020 or Cadillac customer service at 1-800-333-4223. The manufacturer's number for this recall is N252540430. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 26,

Filed with NHTSADefect report PDF Owner letter PDF Remedy instructions PDF

NHTSA campaign 26V114000 reported Feb 26, 2026 General Motors, LLC the full filing, and every vehicle covered →

These are vehicle campaigns — the ones the automaker filed against this model. NHTSA also records equipment recalls, filed by a parts maker against a component (a tyre, a child seat, an aftermarket part), and those are not listed here or counted above. nhtsa.gov/recalls shows both for a VIN.

Whether any of this applies to one specific Sierra 3500HD

A campaign covers a build range, not a model year, so two identical-looking cars from 2026 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. GMC publishes its own lookup because federal rule 49 CFR 573.15 requires it to, and to keep it current to within seven days.

NHTSA VIN check →GMC’s own VIN lookup →

Hear about a recall before the letter does

The manufacturer’s letter is the last step of a recall: it has up to 60 days after filing to mail owners, at the address on the registration. We email you the day NHTSA posts a recall on the 2026 GMC Sierra 3500HD, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.

Owner complaints

Source: NHTSA complaint database

5complaints filed

0 involved a crash · 0 a fire · 0 injuries · 0 deaths reported

2.9 per 10,000 built · GMC reported 17,468 Sierra 3500HD built (its Early Warning production report to NHTSA)

Filed per year: 2026: 5

Most-cited components

Power Train 2

Wheels 2

Electrical System 1

Fuel/Propulsion System 1

Service Brakes 1

Steering 1

In owners' own words

Filed with NHTSA by the people who own these cars, one per problem area. Quoted as written, with anything identifying removed.

The vehicle was delivered from the factory with a severe size mismatch between its primary rolling stock and its emergency spare tire. The truck features factory-installed 20-inch wheels and tires but was manufactured and shipped with an undersized 18-inch spare tire assembly secured underneath the bed.

Wheels Aug 29, 2026 NHTSA owner report · ODI 11760573

The contact owns a 2026 GMC Sierra 3500. The contact stated that while driving 2 MPH, the steering wheel failed to function as intended. The contact stated that while making a right turn, the vehicle hesitated. The dealer was contacted by phone and made aware of the failure.

Steering at 4,000 miles Oct 6, 2026 NHTSA owner report · ODI 11769352

The contact owns a 2026 GMC Sierra 3500. The contact stated that while driving at 35-40 MPH on the interstate and towing a loaded trailer, the vehicle experienced reduced braking performance. No warning lights illuminated. The local dealer was contacted and informed that the brakes performed differently.

Power Train at 500 miles Jul 8, 2026 NHTSA owner report · ODI 11749030

Have been driving it on four separate occasions and the engine will start running rough and shut off leaving me with no power brakes or power steering. Once when I was going about 30 miles an hour the other three times when I was coming to a stop with a trailer on just took it in Kendall Chevrolet for the first time they are still…

Electrical System Jun 16, 2026 NHTSA owner report · ODI 11744605

The vehicle was delivered from the factory with a severe size mismatch between its primary rolling stock and its emergency spare tire. The truck features factory-installed 20-inch wheels and tires but was manufactured and shipped with an undersized 18-inch spare tire assembly secured underneath the bed.

Wheels Aug 29, 2026 NHTSA owner report · ODI 11760574

Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.

Crash ratings

Source: NHTSA NCAP

NHTSA has not published 5-Star crash ratings for this model year.

Service bulletins & campaigns

Source: NHTSA manufacturer communications

Communicationsfiled with NHTSA 170

Most recentmanufacturer date 2026-10-23

Kindsas classified by NHTSA 160 service bulletins, 9 service campaigns, 1 other

Most often about: Unknown Or Other, Electrical System, Engine, Fuel/Propulsion System, Power Train.

N262572131-01 Service campaign
2026-10-23 · Engine
Customer Satisfaction Program. Certain vehicles listed above may have a condition in which the oil galley in the cylinder head was not drilled properly. Dealers are to inspect and if necessary, replace the engine.
PIC6602Y Service bulletin
2026-10-17 · Unknown Or Other
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
PIT6110L Service bulletin
2026-10-07 · Unknown Or Other
This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently investigating.
PIT6457C Service bulletin
2026-09-28 · Unknown Or Other
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
PIC6540K Service bulletin
2026-09-28 · Unknown Or Other
This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6553 Service bulletin
2026-09-26 · Unknown Or Other
This Preliminary information communicates that Engineering is working on a resolution and no parts should be replaced at this time.
PIT5698F Service bulletin
2026-09-26 · Unknown Or Other
This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
PIT6549 Service bulletin
2026-09-21 · Unknown Or Other
This preliminary information communicates an issue with a service column lock message and DTC U3000. Engineering is working on the issue and in the meantime dealerships are to reset/clear the DTC and perform four sleep cycles to verify the DTC does not return.

A service bulletin is the manufacturer telling its dealers how to diagnose or repair a known condition. It is not a recall, not a finding that the vehicle is defective, and the work is not automatically free — though a bulletin is often what a dealer works from when you describe a symptom, so quoting the document number can save a diagnosis. The count is every communication filed; the list shows the most recent, one entry per campaign, because a single campaign is usually filed as several documents on the same day. The summaries are NHTSA's; the full documents come from the manufacturer.

Diagnostic trouble codes on file

Source: NHTSA manufacturer communications and complaints

Codes documented against this model year in the federal record. A code appearing here does not mean this vehicle will set it — it means the code is part of this nameplate-year's documented history.

Code	What it means	Most often filed under	Where it appears
P062B P062B on GMC →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Unknown Or Other	3 bulletins
U3000 U3000 on GMC →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Unknown Or Other	2 bulletins

Generic codes (the second character is 0 or 2) mean the same thing on every vehicle sold in the United States. Manufacturer-specific codes (1 or 3) mean whatever the automaker assigned, and no honest source can define them for you — which is why the ones here carry the evidence instead of a definition. A code is a link when enough separate federal documents name it across the catalogue to be worth a page of its own; the rest are listed here, where the vehicle is the context that makes them mean something.

Compare the 2026 Sierra 3500HD with

Any vehicle, your weights →

Head-to-head	Verdict
2026 Chevrolet Silverado 3500HD · Pickup truck · grade B	Silverado 3500HD +15.5
2026 Chevrolet Silverado 2500HD · Pickup truck · grade A	Sierra 3500HD +7.2
2026 Ram 2500 · Pickup truck · grade D	Sierra 3500HD +20.7
2026 Ram 3500 · Pickup truck · grade C	Sierra 3500HD +9.1
2026 Ford F-250 Super Duty · Pickup truck · grade D	Sierra 3500HD +19.4

Sierra 3500HD by model year

all years, side by side →

Year Safety Recalls Complaints

2026 this page B 2 5 2025 A 1 17 2024 C 3 50 2023 A 1 28 2022 D 3 32 Park outside 2021 F 5 20 Park outside 2020 F 8 51 2019 F 7 13 2018 F 6 14 2017 F 7 13 2016 F 7 19

Common questions about the 2026 Sierra 3500HD

Source: EPA, NHTSA and manufacturer press kits

Does the 2026 GMC Sierra 3500HD have any recalls?

NHTSA has posted 2 recall campaigns for the 2026 GMC Sierra 3500HD. The most serious on file is 26V129000, covering Fuel System, Gasoline. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.

How safe is the 2026 GMC Sierra 3500HD?

NHTSA has not published a crash-test rating for the 2026 GMC Sierra 3500HD yet. On the recall record WhichTrim grades it B (89/100), which measures open and severe recalls rather than crash protection.

What are the dimensions of the 2026 GMC Sierra 3500HD?

Transport Canada measured it at 235.4–266.1 in long, 81.9 in wide (body, without mirrors), 79.9–80.7 in tall, on a 141.7–172.0 in wheelbase. Curb weight: 6,338–7,172 lb depending on configuration. Those are its measurements of the North American versions; every figure is in the table above.

What do owners complain about on the 2026 GMC Sierra 3500HD?

Owners have filed 5 complaints with NHTSA about the 2026 GMC Sierra 3500HD, most often about power train, wheels, electrical system. Complaints are unverified owner reports, so treat the pattern as a signal and the individual report as an anecdote.

Are there service bulletins for the 2026 GMC Sierra 3500HD?

The manufacturer has filed 170 service bulletins and related communications with NHTSA for the 2026 GMC Sierra 3500HD, most often covering unknown or other, electrical system, engine. The most recent is dated 2026-10-23. A bulletin is not a recall: it is the repair procedure a manufacturer sends its dealers for a condition it knows about, and the work is not automatically paid for. It is still worth knowing — if the symptom matches, quoting the bulletin number at the service desk can save a diagnosis. The document numbers and summaries are listed above.

Is the 2026 GMC Sierra 3500HD better than the 2026 Chevrolet Silverado 3500HD?

The Chevrolet Silverado 3500HD wins clearly, 94.8 to 79.3, on safety. We publish a full side-by-side of the 2026 GMC Sierra 3500HD against the 2026 Chevrolet Silverado 3500HD — specifications by family, equipment feature by feature, safety record and ownership costs. You can re-weight what matters to you and the verdict recalculates.

What we hold, and what an empty row means

Paid vehicle-history reports will not tell you the difference between “nothing happened to this car” and “we never received that record” — both of the big two say as much in their own help pages. Most of what is on this page comes from complete federal registers, so we can tell you which is which, row by row.

Data	Held	Source	What it covers — or what empty means
Fuel economy & configurations	none	EPA certification records	The EPA does not certify vehicles rated over 8,500 lb GVWR, so heavy-duty nameplates have no entry at all.
Emission certificates	none	EPA emission certificates	The EPA published no certificate we could match to a configuration on this page.
Recalls	2	NHTSA recall campaigns	A complete federal register: every campaign covering this model year, with severity and advisory flags.
Owner complaints	5	NHTSA complaint database	Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold.
Crash ratings	none	NHTSA NCAP	NHTSA has not tested this model year. Cars are selected for testing, so untested is not unsafe.
Service bulletins	170	NHTSA manufacturer communications	Everything the manufacturer told its dealers about a defect or malfunction, short of a recall.
Investigations	none	NHTSA Office of Defects Investigation	No defect investigation has been opened.
Driver-assist crash reports	none	NHTSA Standing General Order 2021-01	No report has been filed. Only entities named in the order report, and only crashes they hear of — so this is also what an unequipped car, or a manufacturer without telematics, looks like.
Specifications filed with NHTSA	7 fields	NHTSA vPIC, decoded from VIN patterns	What the manufacturer filed under the federal VIN rule — a configuration, not the full trim ladder.
Measured dimensions	7 fields	Transport Canada, Canadian Vehicle Specifications	Length, width, height, wheelbase, track and curb weight, measured on the North American versions.
Trims, pricing & equipment	none	Manufacturer press kit	We have not transcribed a press kit for this model year yet. This is our gap, not the manufacturer's — the one row here where an empty cell means we are behind.

Rebuilt nightly; this page was generated 2026-10-26. Every figure above is traceable to the source named beside it, and the JSON for this page carries the same values with their identifiers.

Sources & method

Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). The most serious recall counts in full and each further one counts 85% of the one before, because a vehicle sold in millions is recalled more often than a rare one without being more dangerous — and because a flat subtraction bottomed the scale out, scoring a vehicle with 22 recalls within a point of one with six. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Read it as what it counts: recall campaigns on the federal record, weighted by severity. The damping reduces the sales bias by roughly 40% but does not remove it: like our complaint counts, this is not normalized by how many were sold, so a best-seller still scores somewhat worse than an obscure model with the same real risk. NHTSA crash ratings, do-not-drive and park-outside advisories, and the crash, fire, injury and death counts in owner complaints are reported separately on every page and never blended into the letter — a vehicle can hold five stars and a poor letter at once, and where that happens we say so rather than leave you to notice. Because the scale subtracts from a clean sheet, a model year too new to have been recalled, complained about or bulletined scores full marks on an empty record; we label those grades provisional rather than present them as earned.

EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed nightly.

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