2025 Gmc Sierra 3500 problems, complaints & recalls
Most-reported problem areas: Service Brakes (3) · Tires:sidewall (2) · Engine (2)
🧭 Reliability snapshot
Compared against other Gmc Sierra 3500 model years — complaint volume vs the model's median year, recalls and severity. How we score →
Safety recalls (1)
Fuel System, Gasoline:delivery:fuel Pump:control/Drive Module 2026-03-05 · campaign 26V129000 · 11,807 vehicles
Defect: 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.
Service bulletins (362)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Unknown Or Other 2026-10-17 · PIC6602Y · Service Bulletin/Repair Instructions
this preliminary information communicates to dealers steps to follow to obtain an iok radio.
Unknown Or Other 2026-10-07 · PIT6110L · Service Bulletin/Repair Instructions
this preliminary information communicates an issue with the ses mil and dtc p062b and engineering is currently investigating.
Unknown Or Other 2026-09-28 · PIT6457C · Service Bulletin/Repair Instructions
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.
Unknown Or Other 2026-09-28 · PIC6540K · Service Bulletin/Repair Instructions
this preliminary information communicates to dealers a procedure to reset the radio.
Unknown Or Other 2026-09-26 · PIT5698F · Service Bulletin/Repair Instructions
this pi provides diagnostics tips on how the lin bus works and how to diagnosis it.
Unknown Or Other 2026-09-21 · PIT6549 · Service Bulletin/Repair Instructions
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.
Showing the 6 most recent of 362 bulletins. Search all of them free at nhtsa.gov.
What owners report
2026-10-05 · Wheels“at approximately 9,000 miles and 9 months of ownership, both front wheelhouse liners on my 2025 gmc sierra 3500hd denali ultimate permanently deformed and sagged into the front tire clearance area. the truck is completely stock, including the factory wheels, tires, suspension, and ride height. no modifications have been made that would affect tire-…”
2026-04-19 · Service Brakes“the electronic part of the truck gave a warning and shut off my trailer brake system while towing a 21k 5th wheel trailer (x2). the truck is available for inspection. any part of the electronics package that has the ability to disable a trailer braking system while towing needs to be removed/disabled immediately. the truck has not been seen by a…”
2026-04-15 · Service Brakes, Hydraulic:foundation Components:disc:caliper“the contact owns a 2025 gmc sierra 3500 used for hauling a 2026 aluminum trailer equipped with a deemaxx: dbi-7k-maxx-ss-kit brake kit. the contact stated that while driving at an undisclosed speed, the brake caliper bracket detached due to insufficient generic quality bolts included in the brake kit. the contact pulled over and had the trailer tow…”
2026-04-01 · Power Train · 40,000 mi“the contact owns a 2025 gmc sierra 3500. the contact stated that the transmission was shifting hard and was jerking while shifting gear. additionally, the vehicle failed to accelerate above 50 mph. the messages “reduced acceleration” and “def low” were displayed. while refueling the vehicle, the fuel gauge failed to correctly display the level of f…”
2026-03-23 · Tires:sidewall“i am reporting a potential safety defect involving goodyear wrangler trailrunner at tires size lt275/65r20. i purchased a new 2025 gmc sierra 3500hd in august 2025. by the time the vehicle reached approximately 1,800 miles, noticeable sidewall bulges appeared on both rear tires. as a 36-year automotive professional, i recognized the serious safety…”
2026-03-08 · Unknown Or Other“randomly when the truck is turned on, the turn signals will stop working, no noise, nothing. when this happens, the infotainment system also stops working. it is unsafe to be driving and not knowing if your signals are working or not. this has been happening since the truck was purchased from the dealer.…”
2026-01-30 · Service Brakes“the truck automatically engages the parking brake only when on an incline, never at any other time. i am so used to engaging the parking brake at all other times i also engage it when on an incline. the problem is the truck disengages the brake automatically after i've engaged it. this has happened multiple times when i've been towing a large bo…”
2025-12-22 · Engine“oil cooler for truck is defective and thus allowed all oil to be mixed with the coolant. gm is stating they will flush engine and replace with exact same part. very common issue and sad to have a $100k truck and it is junk. …”
2025-12-18 · Forward Collision Avoidance: Warnings“picked up vehicle from dealership new, with 12miles on the odometer. during the trip home (over 150+ miles each way) and at 54 miles a "forward collision system unavailable" warning message appeared on the dash. stopped for coffee and restarted the vehicle and the error cleared. it re-appeared at 235 miles, and again at 427 miles along with an obd…”
2025-11-29 · Engine““i own a 2025 gmc sierra with 30,000 miles. the oil cooler failed and caused loss of oil pressure and potential internal engine damage. the dealership acknowledges the failure but refuses to escalate the case or perform a proper inspection. i am being instructed to continue driving the truck even though it may suffer catastrophic failure while driv…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.