2025 Chevrolet Silverado 3500 Lemon Law Case Study: Cash and Keep Settlement in Nevada
A Brand-New 2025 Chevrolet Silverado 3500 HD Duramax Diesel That Spent 320 Cumulative Days Out Of Service Across Seven Warranty Visits: Including an ECM and TCM Update Under GM Bulletin 23-NA-061, a Diesel Particulate Filter Failure With DTCs P2463 and P24A4, a Stuck EGR Cooler Bypass Valve With DTCs P24A5-00 and P245B-00, an Open Technical Assistance Center (TAC) Case With General Motors, and a Final Teardown That Replaced the DPF, All Eight Diesel Injectors, and the EGR Valve
Our client purchased a brand-new 2025 Chevrolet Silverado 3500 HD Duramax diesel in Nevada on November 30, 2024, with just 37 miles on the odometer at delivery. Over the next ten months, this working heavy-duty pickup, equipped with the General Motors Duramax 6.6L diesel powertrain and the full emission control stack (diesel particulate filter, exhaust gas recirculation cooler bypass valve, selective catalytic reduction reductant system), would spend a cumulative 320 days out of service for warranty repair across seven separate authorized-Chevrolet-service-partner visits, with one visit anchored to a manufacturer-issued GM technical bulletin (23-NA-061 on the ECM and TCM update) and a final visit anchored to a Technical Assistance Center (TAC) case with General Motors that ended with the DPF, all eight diesel injectors, and the EGR valve replaced.
The defects centered on the Duramax 6.6L emission control architecture: a diesel particulate filter (DPF) failure at Visit 3 with DTCs P2463 and P24A4 requiring DPF replacement, seal, and pipe; a stuck EGR cooler bypass valve at Visit 5 with DTCs P24A5-00 and P245B-00 requiring complete valve replacement after the valve was found sticking due to an internal fault with a 7% variance between commanded and actual position; recurring DPF regeneration cycles that returned the soot level to 0% only to re-accumulate over weeks; and a final Visit 7 (August 11 to September 10, 2025) where the DPF soot level was found at 255%, regeneration was no longer possible, and, on Technical Assistance Center (TAC) advice, the DPF, all eight diesel injectors across both banks, and the EGR valve were replaced. With 320 cumulative days out of service, and with General Motors’ authorized Chevrolet service network unable to permanently resolve the underlying emission-system breach-of-warranty pattern, a federal Magnuson-Moss Warranty Act claim was the cleanest path to compensation.
What Went Wrong
- Side-sensor impact-sensor false alerts, recurring (Visit 1): Side-sensor impact sensors going off when the towing mirrors were extended for trailer towing. On a Silverado 3500 HD, which is purpose-built for fifth-wheel and gooseneck trailer towing with factory tow-mirror packages, a side-sensor system that triggers false alerts in the most fundamental use case of the truck is a substantial impairment of utility
- ECM and TCM update under GM bulletin 23-NA-061 (Visit 2): Authorized Chevrolet technician updated the Engine Control Module (ECM) and Transmission Control Module (TCM) per GM bulletin 23-NA-061
- Diesel particulate filter failure, DTCs P2463 and P24A4 (Visit 3): Check engine light illuminated alongside a “Cleaning Exhaust Filter” dashboard message. Diagnosis identified two stored diagnostic trouble codes: DTC P2463 and DTC P24A4, indicating a malfunction in the pressure sensor and the reductant system. The repair required a new exhaust particulate filter, a new seal, and a new pipe
- Stuck EGR cooler bypass valve, DTCs P24A5-00 and P245B-00 (Visit 5): Check engine light returned with DTCs P24A5-00 and P245B-00. Documented testing showed the valve responding slowly with a variance of up to 7% between commanded and actual positions. The valve was found sticking due to an internal fault, requiring complete EGR cooler bypass valve replacement
- TAC case, DPF soot at 255%, all 8 injectors replaced (Visit 7): The same check engine light returned with DTCs P24A4 and P2463, and the DPF soot level was found at 255%, far beyond the level at which regeneration is possible. The dealership opened a Technical Assistance Center (TAC) case directly with General Motors. The TAC directed a cylinder balance test, which did not identify a single failed injector, but the EGR valve’s minimum learned position was monitored at 21.5%, close to the 22% limit specified in a separate GM service bulletin. Per the TAC’s recommendation, the DPF was replaced, all eight diesel injectors across both banks were replaced along with all associated single-use parts (with new flow rates and small fuel quantity programmed and reset in GDS), and the EGR valve was replaced
- Cumulative 320 days out of service, 7 documented warranty visits: Approximately 320 calendar days off the road for warranty repair (truck was delivered November 30, 2024; first repair began January 15, 2025 at 7,054 miles; final teardown completed September 10, 2025)
Seven Warranty Visits, 320 Cumulative Days Out of Service, One 2025 Silverado 3500 HD Duramax Diesel
Visit 1: January 15 to August 14, 2025 (recurring side-sensor impact-sensor false alerts)
- Client reported the side-sensor impact sensors going off when the mirrors were extended for towing, an ongoing fault documented from January 15 to August 14, 2025
- On a Silverado 3500 HD, a heavy-duty pickup purpose-built for fifth-wheel and gooseneck trailer towing with factory tow-mirror packages, side-sensor impact sensors that trigger false alerts in the most fundamental use case of the truck is a substantial impairment of utility
- The first repair event began at 7,054 miles (mileage at first repair)
Visit 2: March 14 to 31, 2025 (17 days)
- Authorized Chevrolet technician updated the Engine Control Module (ECM) and Transmission Control Module (TCM) per GM bulletin 23-NA-061
Visit 3: March 24 to April 24, 2025 (31 days)
- Client reported the check engine light and the “Cleaning Exhaust Filter” dashboard message both illuminated
- Diagnosis identified two stored diagnostic trouble codes: DTC P2463 and DTC P24A4, indicating a malfunction in the pressure sensor and the reductant system, specifically related to the exhaust particulate filter
- Repair performed: new exhaust particulate filter (DPF), new seal, and new pipe installed, followed by a test drive to verify the repair
- Job completed under warranty (code WAR): 1.2 hours for filter replacement + 1.0 hour for diagnosis + 1.4 hours of additional labor
Visit 4: April 30 to May 2, 2025 (3 days)
- Technician ran a DPF regeneration to clear the diesel particulate filter and performed a multipoint vehicle inspection
- A return visit within days of a DPF replacement for an additional regeneration cycle is itself a documented sign that the underlying defect was not fully resolved at Visit 3
Visit 5: May 6 to 14, 2025 (9 days)
- Check engine light returned with DTCs P24A5-00 and P245B-00, indicating a stuck Exhaust Gas Recirculation (EGR) cooler bypass valve
- Documented testing per published GM procedures showed the valve responding slowly with a variance of up to 7% between the commanded and actual positions
- Repair performed: technician disassembled the engine per the published service document, removed the failed EGR cooler bypass valve, installed a new EGR cooler bypass valve and gaskets, topped off the coolant, cleared the DTCs, and road-tested the truck to verify the repair
Visit 6: June 2 to 17, 2025 (16 days)
- Technician performed another DPF regeneration, verified test passes, and confirmed soot level returned to 0%
- Customer was advised by the dealership not to let the vehicle idle for extended periods
Visit 7, August 11 to September 10, 2025 (31 days, TAC case, DPF, injectors and EGR valve replaced)
- Check engine light returned with the same codes P24A4 and P2463; the DPF soot level was found at 255%, far beyond the level at which a regeneration cycle is possible
- Induction system checked for leaks and air leakage under load was monitored, no issues found
- Dealership opened a Technical Assistance Center (TAC) case directly with General Motors
- Per the TAC’s direction, a cylinder balance test was performed; no single failed injector was identified
- The EGR valve’s minimum learned position was monitored at 21.5%, close to the 22% limit specified in a separate GM service bulletin
- Per the TAC recommendations, the DPF was replaced (all sensors transferred, system reset in GDS); all eight diesel injectors across both banks were replaced along with all associated single-use parts, with new flow rates and small fuel quantity programmed and reset in GDS; and the EGR valve was replaced. The truck was successfully road-tested
The Legal Basis for This 2025 Chevrolet Silverado 3500 HD Duramax Claim
Nevada’s Lemon Law, codified at NRS 597.600 through NRS 597.680, protects new-vehicle buyers and lessees in Nevada, including owners of heavy-duty diesel pickup trucks like the Chevrolet Silverado 3500 HD with the Duramax 6.6L diesel powertrain. Under NRS 597.630, a presumption arises that a reasonable number of repair attempts have been made if either: (a) the same nonconformity has been subject to repair four or more times by the manufacturer or its authorized dealer and the nonconformity continues to exist; or (b) the vehicle has been out of service by reason of repair for a cumulative total of 30 or more calendar days. Both prongs apply within the protected statutory window of one year from the date of original delivery. Either prong creates the statutory presumption.
This case presented an unusually strong set of legal factors:
- Substantial nonconformity to the express written warranty, emission control system: The Duramax 6.6L emission control system (DPF, EGR cooler bypass valve, SCR reductant system) is one of the most heavily warranted components on any modern diesel pickup, with federal EPA emission durability warranty obligations on top of the GM new-vehicle warranty. A truck that requires DPF replacement, EGR valve replacement, and complete injector replacement inside the first year of ownership is a substantial nonconformity to the express written warranty regardless of any single-defect threshold
- Federal Magnuson-Moss Warranty Act, fee-shifting against General Motors LLC: Repeated unsuccessful warranty repairs on a written-warranty nonconformity also triggered a federal claim against General Motors LLC under 15 U.S.C. § 2310, which independently provides a remedy for breach of express warranty regardless of the state-law presumption period and lets the court award attorney fees against the manufacturer
How Easy Lemon Secured the $12,000 Cash and Keep Settlement
Free Case Evaluation
We reviewed the complete repair history across all seven authorized Chevrolet service-partner visits and confirmed 320 cumulative days out of service. We also identified one GM-issued technical bulletin (23-NA-061) and one Technical Assistance Center (TAC) case on the file.
Documentation & Case Building
Our team compiled every authorized Chevrolet repair order, every diagnostic trouble code (DTCs P2463, P24A4, P24A5-00, P245B-00), every GM-issued bulletin reference (23-NA-061), every TAC case identifier, and every replaced part, including the Visit 3 DPF replacement, the Visit 5 EGR cooler bypass valve replacement, and the Visit 7 repair that replaced the DPF, all eight diesel injectors across both banks, and the EGR valve, into an airtight timeline showing General Motors LLC’s inability to permanently repair the documented nonconformities.
Demand to General Motors LLC
We filed a formal demand against General Motors LLC (the manufacturer of record for the Chevrolet Silverado 3500 HD and the Duramax 6.6L diesel powertrain) citing the federal Magnuson-Moss Warranty Act (15 U.S.C. § 2310), documenting seven warranty repair events, 320 cumulative days out of service, one GM-issued technical bulletin, one TAC case, and the replacement of the DPF, all eight diesel injectors, and the EGR valve.
$12,000 Cash and Keep Settlement
Easy Lemon successfully negotiated a $12,000 Cash and Keep settlement, which combines the payment to our client and the attorney fees, while our client retained ownership of the Silverado 3500 HD Duramax.
$12,000 Cash and Keep Settlement Recovered
Key Case Facts
- Vehicle: 2025 Chevrolet Silverado 3500 HD Duramax (heavy-duty diesel pickup with the GM Duramax 6.6L diesel powertrain)
- Purchased in: Nevada (November 30, 2024)
- Status at purchase: Brand new (purchased new) at an authorized Chevrolet dealership
- Mileage at delivery: 37 miles
- Mileage at first repair: 7,054 miles (Visit 1)
- Current mileage: Approximately 42,000 miles
- Repair attempts: 7 documented warranty repair events at authorized Chevrolet service partners
- Cumulative days out of service: 320 days
- Manufacturer case identifiers anchored to the file: GM technical bulletin 23-NA-061 (ECM and TCM update) and Technical Assistance Center (TAC) case (Visit 7: DPF + 8 diesel injectors + EGR valve replaced)
- Primary defects: Recurring side-sensor impact-sensor false alerts when towing mirrors extended; ECM and TCM update under GM bulletin 23-NA-061; diesel particulate filter failure with DTCs P2463 and P24A4 (DPF replaced); stuck EGR cooler bypass valve with DTCs P24A5-00 and P245B-00 (EGR cooler bypass valve replaced); chronic DPF soot accumulation requiring repeated regeneration cycles and ultimately replacement of the DPF, all 8 diesel injectors across both banks, and the EGR valve on TAC advice
- Manufacturer: General Motors LLC (Chevrolet Silverado 3500 HD and Duramax 6.6L diesel powertrain)
- Settlement type: Cash and Keep ($12,000), client retains the vehicle, manufacturer pays compensation under the federal Magnuson-Moss Warranty Act (15 U.S.C. § 2310)
What Our Clients Are Saying
Attorney on Record
Steven Nassi, Esq.
Managing Partner, Easy Lemon by RockPoint Law P.C.
Licensed attorney whose practice is limited to lemon law. Steven leads the Easy Lemon legal team and has overseen thousands of successful lemon law claims against major manufacturers including General Motors, Ford, Stellantis, Tesla, Audi, Volkswagen Group of America, Porsche, BMW, Mercedes-Benz, Kia, and low-volume specialty manufacturers including INEOS Automotive Limited, Rivian, Lucid, Polestar, Lotus, Karma, and Vinfast.
DPF, EGR, Diesel Injector, or Check Engine Light Problems With Your Chevy Silverado 3500 HD Duramax?
A diesel particulate filter failure (DTC P2463 or P24A4), a stuck EGR cooler bypass valve (DTC P24A5-00 or P245B-00), an ECM/TCM update under GM bulletin 23-NA-061, repeated DPF regeneration cycles, an open GM TAC case, a complete diesel injector replacement, or any chronic emission-system warranty defect on a 2024 or newer Chevrolet Silverado 3500 HD Duramax (or GMC Sierra 3500 HD Duramax) in Nevada that has already been to an authorized Chevrolet service partner multiple times is unacceptable, and you may already qualify for compensation under NRS 597.600 - 597.680 plus federal Magnuson-Moss. Free case evaluation, 30 seconds.
Qualify in 30 Seconds →2025 Chevrolet Silverado 3500 Lemon Law Questions in Nevada
Your Chevrolet May Have a Lemon Law Claim Too
If your Chevrolet keeps going back to the shop for the same problem, you may qualify under your state's lemon law, the manufacturer pays our fees, not you. We handle Chevrolet cases like this one regularly.
See Our Chevrolet Lemon Law Page →Learn More
- Nevada Lemon Law Attorneys
- All Settlements & Case Studies
- Lemon Law By Manufacturer
- Car Lemon Law Guide
- Free Case Evaluation
- Chevrolet Lemon Law
Related Case Results
- 2025 Chevrolet Suburban buyback in Georgia ($119,375)
- 2024 Chevrolet Corvette buyback in Florida ($105,233)
- 2024 Chevrolet Corvette buyback in New Hampshire ($92,019.40)
