The 2025 GMC Sierra 3500 has 1 NHTSA recall campaign affecting an estimated 11,807 vehicles. Recall repairs are always free at any authorized dealer. Owners have filed 25 complaints with NHTSA, most often about the service brakes. Last updated July 5, 2026.
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.
Consequence
An engine stall increases the risk of a crash.
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, 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…
Complaints by component
SERVICE BRAKES
4
ELECTRICAL SYSTEM
3
ENGINE
2
FORWARD COLLISION AVOIDANCE: WARNINGS
2
TIRES:SIDEWALL
2
UNKNOWN OR OTHER
2
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
1
ENGINE AND ENGINE COOLING
1
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:UREA INJECTION SYSTEM (DEF)
1
EQUIPMENT
1
Total complaints25
What owners report
Verbatim reports filed with NHTSA, lightly edited for readability and with personal
information removed.
“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…”
“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…”
“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…”
“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…”
“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…”
“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…”
“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…”
“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.”
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL,
FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2025 GMC Sierra 3500 as of
July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page
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