2025 Gmc SIERRA 3500
Problems, Recalls & Reliability Report
Quick Summary
The 2025 Gmc SIERRA 3500 has 25 owner complaints filed with NHTSA — that's 1.0x the segment average of 25. The most common issue is brakes problems (20% of all complaints), specifically: while towing my fifth wheel trailer, the truck intermittently disconnects the trailer brakes while in motion. this results in a sudden loss of roughly 75% of my braking capability, creating an extremely dangerous situation. i have a professional driving background, which has helped me avoid an accid. There is 1 recall issued for this model year.
25
Total Complaints
1
Recalls Issued
—/5
Safety Stars
1.0x
vs Segment Avg
Known Problems(top 5 of 8)
BRAKES
5 complaints- • While towing my fifth wheel trailer, the truck intermittently disconnects the trailer brakes while in motion. This results in a sudden loss of roughly 75% of my braking capability, creating an extremely dangerous situation. I have a professional driving background, which has helped me avoid an accid
- • Hose from power steering pump came off causing truck to loose power steering and brakes. Fortunately we had just exited the interstate and were in a parking lot when this occurred. Truck was towed 90 miles to dealer who confirmed that hose was incorrectly installed by factory
- • 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 happen
“While towing my fifth wheel trailer, the truck intermittently disconnects the trailer brakes while in motion. This results in a sudden loss of roughly 75% of my braking capability, creating an extremely dangerous situation. I have a professional driving background, which has helped me avoid an accid”
— NHTSA complaint filing
Recalls (1)
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.
Estimated Insurance Cost for 2025 Gmc SIERRA 3500
How this estimate is calculated
Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.
Maintenance & Warranty
Recommended Gmc SIERRA 3500 Service Intervals
Uses GM Oil Life System. Full-size trucks may have shorter differential and transfer case intervals if used for towing.
"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.
Gmc New-Vehicle Warranty Coverage
Estimated Repair Costs
Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.
🔍 Pre-Purchase Inspection Checklist
Based on 25 owner complaints for this specific year, here's what to check or ask about:
- ☐BRAKES: While towing my fifth wheel trailer, the truck intermittently disconnects the trailer brakes while in motion. This results in a sudden loss of roughly 75% of my braking capability, creating an extremely dangerous situation. I have a professional driving background, which has helped me avoid an accid
Typically appears around 50K miles. Repair cost ~$500
- ☐ELECTRICAL: Intermittent loss of trailer brake function. While traveling and towing a RV trailer with electric brakes, receive a dashboard alert that trailer brakes have been disconnected. This has occurred since vehicle was new. Trailer brake system has been inspected and trailer is not the issue. Took truck t
Typically appears around 50K miles. Repair cost ~$500
- ☐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 th
Typically appears around 50K miles. Repair cost ~$500
- ☐DRIVER ASSIST/CAMERAS: weekly you will start the truck and have no audio of any kind. No blinker noises no collision warning noises, no radio, no on star noise. No sound at all and sound will never come back on until you turn truck off and wait 20 mins. GMC says it's a known software issue, but this has been going on sinc
Typically appears around 50K miles. Repair cost ~$500
- ☐RECALLS: Verify all 1 recall have been completed — free at any Gmc dealer
- ☐General: Get a pre-purchase inspection from an independent mechanic ($100-$200)
Gmc SIERRA 3500 — Year Comparison
How does 2025 compare to other years? Fewer complaints = more reliable.
NHTSA Safety Rating
No NHTSA safety rating available
At a Glance
- Complaints
- 25
- Recalls
- 1
- Fire reports
- 0
- Crash reports
- 0
- Injury reports
- 0
- Segment avg
- 25
Check a Specific VIN
See recalls for YOUR 2025 Gmc SIERRA 3500