2024-2026 Traverse brake pedal sinks, transmission fails, AWD warning? California lemon law rights explained — free case review.
The 2024 Chevrolet Traverse was a complete redesign — new platform, new turbocharged four-cylinder engine, and an upgraded eBoost electronic brake system meant to deliver more precise stopping feel. For many owners, the first year of ownership instead brought something they did not expect: a brake pedal that sinks toward the floor.
GM confirmed the issue in TSB N242482170, issued December 9, 2024. The bulletin identifies a missing internal cartridge seal inside the eBoost brake master cylinder module as the root cause. Without that seal, brake fluid pressure cannot be maintained properly — resulting in a pedal that may sink or go all the way to the floor during what should be a routine stop. GM flagged all affected VINs for dealer inspection and master cylinder replacement. A class action was filed in federal court in October 2025 (Barron et al. v. General Motors LLC, Case 2:25-cv-05696, E.D. Pa.) alleging that the defect affected 2024-2025 Chevrolet, Buick, and GMC vehicles. The litigation is ongoing.
The brake issue did not arrive alone. Within the first model year, GM also issued at least five separate technical service bulletins addressing the new MF8 8-speed automatic transmission, covering fluid leaks, damaged internal seals, faulty snap rings, and coolant contamination in transmission fluid — some within the first 5,000 miles of ownership. Owners of AWD-equipped models began reporting the 'Service All Wheel Drive' warning light with no permanent fix available. Engine stall after remote start is under active GM investigation as of mid-2026 with no repair procedure released. Consumer Reports removed the 2024-2025 Traverse's Recommended designation in December 2025, citing electronics rated 'Poor' and below-average predicted reliability.
If you are in your first or second year of ownership and your Traverse has visited the dealer repeatedly — especially for braking, transmission, or ADAS issues — California's Song-Beverly Consumer Warranty Act may apply to your situation.
The issues owners report most, ranked by severity — each one verified against a cited NHTSA source.
Brake pedal sinks to the floor or feels spongy during routine braking; sudden, unexpected loss of braking force; brake warning light may illuminate.
Engine unexpectedly stalls after remote start or during cold-weather warm-up; vehicle loses power without warning; requires manual restart.
Transmission fluid leak under vehicle; harsh shifting or no-shift condition; drivetrain warning lights; transmission failure with no drive; DTCs P2817, P0746, P0747.
Dashboard 'Service All Wheel Drive' warning illuminates; AWD system disabled and reverts to FWD only; DTC U3000 Sym 92 stored in K47 Rear Drive Control Module.
Unexpected automatic emergency braking activation in non-emergency situations (phantom braking); Super Cruise system non-functional or showing DTCs; steering wheel oscillation while Super Cruise engaged; front camera replaced multiple times without resolution.
Coolant puddle under vehicle; low coolant warning; overheating risk; sweet smell from engine compartment.
A settled Margarian Law case on this exact model, published with the actual settlement math.
Open any defect for the symptoms and why it matters for a California lemon-law claim. Each is tied to a cited NHTSA source.
Brake pedal sinks to the floor or feels spongy during routine braking; sudden, unexpected loss of braking force; brake warning light may illuminate.
Safety-critical brake failure with pedal-to-the-floor events strongly supports a lemon-law claim, especially with documented repair attempts, parts backorders, and the related class action (Barron v. GM). Multiple repair attempts with no resolution = strong lemon basis.
Replace brake master cylinder assembly under warranty; TSB N242482170 covers all affected VINs.
Engine unexpectedly stalls after remote start or during cold-weather warm-up; vehicle loses power without warning; requires manual restart.
Unexpected engine stall — especially after remote start — is a safety defect. With no permanent fix after multiple visits, owners can document a nonconformity that substantially impairs use, value, and safety.
No permanent fix as of June 2026. Interim: manually restart vehicle after stall. GM engineering investigation ongoing.
Transmission fluid leak under vehicle; harsh shifting or no-shift condition; drivetrain warning lights; transmission failure with no drive; DTCs P2817, P0746, P0747.
Total transmission failure in first-year ownership with multiple documented root causes and multiple repair attempts is a strong lemon candidate. Concurrent TSBs signal systemic assembly defects, not isolated incidents.
Varies by fault: turbine shaft seal replacement; snap ring replacement; pump bolt torque to spec; transmission flush if coolant contamination present. Some vehicles required full transmission replacement.
Dashboard 'Service All Wheel Drive' warning illuminates; AWD system disabled and reverts to FWD only; DTC U3000 Sym 92 stored in K47 Rear Drive Control Module.
Owner purchased AWD vehicle; AWD system intermittently disabled with no available fix. Substantially impairs the use and value for which the vehicle was purchased, particularly in adverse weather. Repeated visits with a battery-reset 'fix' that does not resolve the root cause = eligible repair attempts.
No permanent fix as of June 2026. Interim: disconnect battery for 20 minutes to reset module. GM investigation ongoing.
Unexpected automatic emergency braking activation in non-emergency situations (phantom braking); Super Cruise system non-functional or showing DTCs; steering wheel oscillation while Super Cruise engaged; front camera replaced multiple times without resolution.
Unintended braking is a safety hazard. Repeated camera replacements without resolution and an acknowledged GM bulletin with no available fix establish a nonconformity that cannot be repaired within a reasonable number of attempts.
Steering wheel replacement for B19F2 (TSB N242452110). Rear AEB calibration update (TSB 24-NA-048). No fix for phantom forward AEB activations (PIT6167C).
Coolant puddle under vehicle; low coolant warning; overheating risk; sweet smell from engine compartment.
Coolant leak requiring dealer repair is a documented warranty defect. If repairs required multiple visits or caused secondary damage (e.g., overheating), it supports a lemon claim. Special Coverage confirms GM acknowledges systemic scope.
Drain coolant, replace quick-connect seal. Covered under GM Special Coverage N262546590 (5 years / 60,000 miles). Owners who paid prior to April 1, 2026 may request reimbursement by April 30, 2027.
Electronic owner's manual unavailable in infotainment system; owner cannot access safety and operational instructions through vehicle display.
FMVSS noncompliance recall. Lower standalone lemon relevance, but if owner made multiple dealer visits for this or related infotainment issues, it contributes to repair attempt count.
Dealer resets radio configuration — triggers automatic download of owner's manual. Free of charge.
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Radio not set to correct status during production; electronic owner's manual never downloads automatically to the vehicle infotainment system.
Every item below comes from this vehicle's documented defects. The more you recognize, the more a free case review is worth your time.
California's Song-Beverly Consumer Warranty Act — the state's lemon law — requires a manufacturer to repurchase or replace your vehicle if a defect substantially impairs its use, value, or safety and cannot be fixed after a reasonable number of repair attempts during the warranty period.
For safety-related defects like a brake pedal that sinks to the floor, California law creates a rebuttable presumption that two repair attempts are sufficient to trigger lemon law rights. For other serious defects, the general presumption applies after four attempts or 30 cumulative days out of service in the first 18 months or 18,000 miles.
Importantly, a 'repair attempt' can include a dealer visit where the technician cannot replicate the fault or where GM acknowledges the defect in a bulletin but has no fix to offer. For the 'Service All Wheel Drive' and engine stall issues on the 2024-2026 Traverse, GM has publicly acknowledged both problems through its own investigation bulletins while stating no repair procedure is available — those visits still count.
A buyback under Song-Beverly returns your down payment, all monthly payments made, registration fees, and incidental costs, minus a deduction for miles driven before the first repair attempt. An attorney consultation is free in most California lemon law practices, and the manufacturer pays attorney fees when you prevail.
“Could not duplicate” doesn't mean the defect isn't real. Here's exactly what to do to protect a potential California lemon-law claim.
Document the moment it happens. Photos, video, and screenshots of any warning lights — with the date and the mileage.
Get a repair order every visit — even “found nothing.” That paperwork is the foundation of a claim.
Check your VIN at nhtsa.gov/recalls. Note any recall that has no available remedy yet.
Track your out-of-service days. California law counts the cumulative days your vehicle spends in the shop.
Keep loaner & rental records. Alternate-transport paperwork during long repairs matters.
Save everything in one place. Symptoms, dates, repair orders, and every repeat visit — the intermittent ones especially.
Brake pedal sink is especially dangerous to leave undocumented because it can be intermittent — the pedal may feel normal during a dealer test drive but give way during your next stop sign. Here is how to build a strong record:
Describe the brake pedal symptom precisely every time you write up the service request. 'Pedal sinks' and 'pedal goes to the floor' are very different from 'brakes feel soft.' Use the most accurate description. Note the conditions: was it a gentle slow-down or a harder stop? What speed? Did a warning light appear?
For the eBoost defect, TSB N242482170 directed dealers to inspect all affected VINs and replace the master cylinder. If your dealer has not performed this inspection, ask for it by name and reference the TSB number. If the repair was done and the pedal sink has returned, you need a written repair order documenting the recurrence.
For AWD warnings and engine stalls, note that GM has issued active investigation bulletins (PIT6479A and PIP6102) with no permanent repair procedures. That means a dealer visit that ends with 'no fix available' is still a documented repair attempt in which the manufacturer's own bulletin acknowledges the defect exists. Get the repair order in writing.
For phantom AEB events, record every false braking incident: date, time, location, speed, road conditions, and what was (or was not) in front of you. NHTSA complaint records for the 2024 Traverse already include descriptions of 60 or more false warning events. Your log corroborates and strengthens that pattern.
Keep a running log of all out-of-service days — days the vehicle is at the dealer or is unsafe to drive. California law presumes a lemon after 30 cumulative days out of service within the first 18 months or 18,000 miles.
The 2024 Chevrolet Traverse redesign arrived with an unusually dense cluster of first-year manufacturing defects — five MF8 transmission TSBs in a single model year, a brake master cylinder shipped without a critical internal seal, and driver-assistance systems that GM acknowledges are malfunctioning without yet having a fix to offer. That combination — confirmed defects across brakes, transmission, AWD, engine, and ADAS in a vehicle's first 18 months — is the profile of a vehicle that may meet California's lemon law standard.
The brake issue deserves particular attention. A pedal that sinks to the floor is not a comfort complaint — it is a safety failure, and the TSB and class action record confirm GM was aware of it within the first year of production. If your Traverse has had the master cylinder replaced and the issue has recurred, or if you have been waiting for a parts backorder while driving a vehicle with documented brake problems, that is exactly the situation lemon law was designed to address.
— The Margarian Law team
Has your 2024-2026 Chevrolet Traverse had brake pedal problems, transmission failure, AWD warnings, or any of the issues described above — with more than one dealer visit and no lasting fix? You may have lemon law rights under California's Song-Beverly Act. Contact Margarian Law for a free consultation. If we take your case, the manufacturer typically pays our fees.
GM confirmed this issue in TSB N242482170, issued December 9, 2024. The root cause is a missing internal cartridge seal inside the eBoost brake master cylinder module — a manufacturing defect present from the factory. Without the seal, the master cylinder cannot maintain proper brake fluid pressure, which is why the pedal may sink unexpectedly during a normal stop or travel all the way to the floor. GM flagged all affected VINs and directed dealers to inspect and replace the brake master cylinder assembly at no charge under warranty. If your vehicle has not had this inspection, request it by name. If the master cylinder was replaced and the symptom has returned, document the recurrence with a written repair order — repeated brake failures after attempted repair are strong grounds for a California lemon law claim.
As of mid-2026, the eBoost brake master cylinder issue is addressed by GM TSB N242482170 — a technical service bulletin rather than a formal NHTSA safety recall. The distinction matters for owners: a TSB means GM directed its dealers to inspect and remedy affected vehicles under warranty, but the repair is not always proactively scheduled the way a recall notification would be. You may need to contact your dealer directly and reference the TSB number to ensure the inspection and master cylinder replacement are completed. If NHTSA opens a formal investigation or GM escalates the TSB to a recall, affected owners will receive mailed notices. In the meantime, if your vehicle has shown the pedal-sink symptom or you have had multiple brake repairs, a California lemon law attorney can advise whether your situation qualifies for a buyback regardless of recall status.
Owners of 2024-2026 Traverse AWD models have reported this warning, which disables the all-wheel-drive system and forces the vehicle to operate in front-wheel drive only. GM has acknowledged the issue in its own investigation bulletin (PIT6479A), identifying a software fault in the K47 Rear Drive Control Module as the suspected cause. As of mid-2026, GM has not released a permanent software fix and has explicitly told dealers not to replace the physical module because the root cause is software. The only current guidance is a temporary reset by disconnecting the battery for 20 minutes. If you paid for an AWD vehicle and the system is repeatedly disabling itself with no permanent remedy, that condition — substantially impairing the use and value of what you purchased — may support a lemon law claim in California. A dealer visit that ends with 'no fix available' is still a documented repair attempt that counts toward the lemon law threshold.
Phantom automatic emergency braking — the car activating AEB or throwing a collision alert with no actual obstacle — has been reported by numerous 2024-2025 Traverse owners and is reflected in NHTSA complaint filings for both model years. GM has issued multiple technical bulletins addressing related ADAS issues on the 2024 Traverse: TSB 24-NA-048 covers a rear automatic braking calibration update to reduce false triggers when reversing; PIT6167C acknowledges Super Cruise and adaptive cruise malfunctions with no fix currently available. Some owners have documented dozens of unwanted braking events and camera replacements without a resolution. Unintended braking is a safety hazard. If your vehicle has had multiple dealer visits for phantom AEB or Super Cruise faults without a lasting fix, keep a detailed log of every event and preserve all repair orders — this is the exact fact pattern that California lemon law cases are built around.
It is not normal, but it is unfortunately documented for the first model year of the redesigned Traverse. GM issued at least five separate technical service bulletins covering the new MF8 8-speed automatic transmission within the first model year — addressing a damaged turbine shaft seal (TSB N242473580), defective snap rings (PIP5974E), loose pump bolts causing fluid leaks (PIP6025), and coolant contamination in the transmission fluid. NHTSA complaint records include owners describing complete transmission failure before 5,000 miles and in some cases before 1,000 miles. If your transmission has failed or been replaced under warranty in the early months of ownership — especially if you had to wait for parts or were without your vehicle for an extended period — that history may support a California lemon law claim. Every day the vehicle was at the dealer and unavailable to you counts toward the 30-day out-of-service threshold under Song-Beverly.
California's Song-Beverly Consumer Warranty Act gives you the right to a vehicle repurchase or replacement if a defect covered by your warranty substantially impairs the use, value, or safety of the vehicle and cannot be repaired after a reasonable number of attempts. For the 2024-2026 Traverse, the most common qualifying patterns include: (1) a brake pedal that sinks to the floor on more than one occasion despite a repair attempt; (2) an AWD system that keeps disabling itself with multiple dealer visits but no permanent fix available; (3) repeated transmission failures or extended periods waiting for parts; and (4) repeated phantom AEB events with no resolution after multiple visits. If any of these describe your situation and your vehicle is still within the manufacturer's warranty period, you likely have grounds for a lemon law evaluation. The evaluation is free, and if the case proceeds, the manufacturer is responsible for your attorney fees if you prevail.
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