Phantom AEB braking recall and headlight defects hit the new Canyon hard. Repeated dealer visits may qualify for a CA lemon law buyback. Free case review.
The third-generation GMC Canyon debuted for 2023 as a ground-up redesign — sharper styling, a standard 2.7L TurboMax four-cylinder, and a full suite of advanced driver-assistance technology. Within its first model year on the road, it became the subject of one of the more alarming safety recalls of 2024: phantom braking. The front camera module (FCM) software was improperly calibrated, causing the automatic emergency braking system to engage without any obstacle present. Drivers reported their Canyons suddenly slowing or stopping at highway speeds with no input and no hazard in sight — a dangerous situation when traffic is close behind. NHTSA campaign 24V133 (February 2024) confirmed five verified crashes — four of them in the United States — and 234 owner complaints before the recall was issued. The 2024 model year brought a second wave of safety issues. Headlights on thousands of 2024 Canyons were found to flicker intermittently due to a software defect in the LED driver module, violating Federal Motor Vehicle Safety Standard 108. GM issued a stop-sale order on dealer inventory before the recall (24V673) was formally announced. A separate recall (24V491) addressed fuel tank lock rings that were never fully tightened at the factory — a latent fire risk in a crash. Across 2023–2026, AT4X AEV Edition owners face a further issue: incorrect SDM software that could cause the passenger airbag to over-deploy with excessive force. The cumulative picture is a new-generation truck that shipped with documented safety defects across its ADAS, lighting, fuel, seat belt, and airbag systems. If your 3rd-gen Canyon has been back to the dealer for phantom braking events, persistent headlight problems, or any other recurring defect, California's Song-Beverly Consumer Warranty Act may entitle you to a buyback or replacement.
The issues owners report most, ranked by severity — each one verified against a cited NHTSA source.
Vehicle brakes suddenly and unexpectedly at highway or city speeds with no obstacle present; abrupt stop without driver input; rear-end crash risk from following traffic.
Headlights flicker or flash intermittently while driving at night or while parked; reduced forward visibility; other drivers may misinterpret flashing lights.
No obvious pre-crash symptom; potential fuel odor near vehicle; risk of fuel spillage and fire if vehicle is involved in high-speed crash.
No pre-crash indication; seat belt buckle may shift or detach from seat structure during a collision, failing to restrain occupant properly.
No owner-visible pre-crash symptom; in a crash, passenger-side airbag inflates with excessive force (stage 2 instead of stage 1), increasing injury risk to passenger.
Loud whining or howling noise from transmission area when accelerating or coasting at 25-50 mph; sound most prominent in 4th or 5th gear at 2,000-2,800 RPM; absent in 1st, 2nd, or 6th+ gears.
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.
Vehicle brakes suddenly and unexpectedly at highway or city speeds with no obstacle present; abrupt stop without driver input; rear-end crash risk from following traffic.
Safety recall with documented crashes and injuries. Five verified crashes (four US), 234 owner complaints. Repeated phantom-braking events before recall remedy, or failure of OTA fix to resolve, support substantial-impairment argument. High CA lemon-law relevance.
Dealer reprograms (flashes) the FCM software to corrected calibration at no charge.
Headlights flicker or flash intermittently while driving at night or while parked; reduced forward visibility; other drivers may misinterpret flashing lights.
13,241 units recalled; 272 owner complaints preceded recall. FMVSS 108 noncompliance confirms federal safety standard violation. GM issued stop-sale order on dealer inventory. Persistent nighttime lighting failure strongly supports substantial-impairment claim.
Dealer replaces LED driver module in each headlamp assembly with updated-software unit at no charge.
No obvious pre-crash symptom; potential fuel odor near vehicle; risk of fuel spillage and fire if vehicle is involved in high-speed crash.
Fire risk from fuel leak is a categorical safety defect. Although population is small (2,492 Canyon units), CA lemon law does not require a crash to have occurred — a documented latent fire-risk defect suffices.
Dealer inspects and fully locks (torques) fuel tank lock ring; no replacement parts needed; no charge.
No pre-crash indication; seat belt buckle may shift or detach from seat structure during a collision, failing to restrain occupant properly.
Latent safety-critical defect. While population is tiny (56 Canyon units), if a specific client's VIN is within scope the latent restraint failure is highly relevant to CA lemon-law claim.
Dealer inspects and torques seat belt buckle attachment bolts on both front seats at no charge.
No owner-visible pre-crash symptom; in a crash, passenger-side airbag inflates with excessive force (stage 2 instead of stage 1), increasing injury risk to passenger.
Airbag over-deployment is a serious safety defect even in a narrow trim population. AT4X AEV is a premium variant; owners face heightened injury risk in any crash before remedy. Supports CA lemon-law claim if unremedied before accident.
Dealers update SDM software (OTA for connected vehicles, or in-dealer for others); production fix applied Nov 5 2025.
Loud whining or howling noise from transmission area when accelerating or coasting at 25-50 mph; sound most prominent in 4th or 5th gear at 2,000-2,800 RPM; absent in 1st, 2nd, or 6th+ gears.
TSB-documented drivetrain noise affecting the primary transmission on a new-generation truck. If multiple dealer visits fail to eliminate the noise, this is a strong lemon-law drivability-impairment count under CA Civil Code §1793.2.
Dealer diagnoses per TSB 24-NA-002 procedure (verify gear/RPM condition); may involve transmission inspection, fluid service, or transmission replacement per GM repair guidance.
Check Engine / MIL light on; rough idle or hesitation; possible hard start or extended crank; potential drivability stumble at low load.
Voluntary emissions recall with stop-delivery order. Small population (~232 vehicles total across Canyon and Sierra 1500). Relevant if client's 2023 Canyon experienced persistent MIL, rough idle, or was caught in stop-delivery prior to delivery.
Dealer replaces all four fuel injectors with correctly calibrated units at no charge; stop-delivery order issued for dealer-inventory units.
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Incorrect SDM calibration software may command second-stage passenger airbag deployment in a crash scenario requiring only first-stage (lower-force) deployment.
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The left or right front seat belt buckle attachment bolt was not tightened to specification during assembly by supplier Lear Corporation.
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The LED driver module within the headlamp assembly contains a software defect causing the left and/or right headlights to flicker while driving or in park, failing to comply with FMVSS No. 108.
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The lock ring securing the fuel pump to the fuel tank assembly may not have been fully locked during production, leaving the pump unsecured.
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The front camera module (FCM) software is improperly calibrated and may falsely detect an obstacle, causing the automatic emergency braking (AEB) to engage unexpectedly without any actual hazard present.
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 requires GM to repurchase or replace your Canyon 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 a safety defect — such as phantom braking that caused or risked a crash — California presumes that two repair attempts may be sufficient to trigger the presumption. For a drivability defect like the transmission whine, the standard is generally four or more attempts, or 30 or more cumulative days out of service. If your Canyon qualifies, you may be entitled to: a full repurchase (the amount you paid, minus a mileage offset), a replacement vehicle of comparable value, or a negotiated cash settlement. GM pays your attorney fees if you prevail under Song-Beverly — so most California lemon law cases cost the owner nothing out of pocket. The above is general information only and is not legal advice. Every case depends on its specific facts, dates, and repair records.
“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.
Phantom braking is inherently intermittent — the vehicle may not reproduce the event during a short dealer test drive — and headlight flickering can similarly come and go. Here is how to build a record if your dealer says they cannot replicate the problem: 1. Document the phantom braking event immediately after it happens. Note the date, time, mileage, road type, approximate speed, traffic conditions behind you, and any warning messages that appeared on the display. Dash cam footage, if you have it, is highly persuasive. 2. For headlight flickering, take a video on your phone the next time it occurs — both to show the flickering itself and to show the specific headlamp affected. Note whether it happens while driving or while parked. 3. Ask the service advisor to document on the repair order that you reported unexpected automatic braking (or headlight flickering), including the specific circumstances. Ask them to reference recall 24V133 (phantom AEB) or 24V673 (headlights) by campaign number, and to note whether the remedy was applied or why it was not. 4. If phantom braking continues after the FCM reprogram under 24V133, bring the vehicle in again and ask the dealer to note on the repair order that the same braking behavior is recurring after the prior recall repair. 5. Keep all repair orders, including UTD visits. Under California law every dealer visit for the same complaint counts as a repair attempt.
A brand-new truck generation shipping with a phantom braking defect that caused five crashes — and a separate headlight software defect that triggered a stop-sale order — illustrates why comprehensive recall-disclosure matters for buyers. The good news is that California's lemon law does not require an accident to have occurred. If your 3rd-gen Canyon has been to the dealer more than once for phantom braking, headlight problems, transmission noise, or any other recurring issue, your service records may already tell the story. Verify your VIN's open recall status at nhtsa.gov, preserve every repair order, and consult a California lemon law attorney about your options.
— The Margarian Law team
Has your GMC Canyon braked on its own with no obstacle in the road? Do your headlights flicker at night? Has the dealer visited more than once for the same problem without a lasting fix? If your 2023–2026 Canyon is covered by any open recall — or if you have experienced recurring symptoms that brought you back to the dealer — your repair history may already support a California lemon law claim. The consultation is free. Find out where you stand.
NHTSA recall 24V133 (issued February 22, 2024) covers 9,047 model-year 2023 GMC Canyons for an automatic emergency braking (AEB) defect. The front camera module (FCM) software was improperly calibrated and can falsely detect an obstacle — causing the AEB system to apply the brakes without any hazard actually present. This phantom braking can happen at highway or city speeds and puts following traffic at risk of a rear-end collision. NHTSA confirmed five crashes (four in the US) and 234 owner complaints before the recall. The remedy is an FCM software reprogram at the dealer at no charge; owner notification letters were mailed April 8, 2024. You can confirm whether your VIN is included by entering it at nhtsa.gov. If your Canyon braked unexpectedly before — or after — the recall remedy was applied, document each event and keep your repair orders.
Yes, unexpected automatic braking is a documented safety hazard. When a vehicle brakes suddenly without driver input at highway speeds, any traffic following closely behind may not have enough distance to stop, creating a rear-end collision risk. NHTSA confirmed five crashes attributed to the phantom braking defect covered by recall 24V133 before the recall was officially issued. If your Canyon has done this — even once — you should bring it to your dealer immediately and ask them to check whether the recall 24V133 FCM software update has been applied to your vehicle. Document the date, time, mileage, location, and circumstances of any phantom braking event. If the braking occurred after the recall remedy was already applied to your vehicle, that is an additional repair attempt for the same defect — relevant to a California lemon law analysis.
Yes. NHTSA recall 24V673 (issued September 12, 2024) covers 13,241 model-year 2024 GMC Canyons for a headlight flickering defect. The LED driver module inside the headlamp assembly has a software defect that causes erratic power delivery to the LED elements, producing flickering while the vehicle is driving or parked. This constitutes noncompliance with FMVSS No. 108, the federal lighting standard. Before the recall was announced, GM issued a stop-sale order preventing dealers from selling new Canyons still in inventory that were affected. The remedy is replacement of the LED driver module in the headlamp assembly at no charge; owner notification letters were mailed October 28, 2024. If your headlights still flicker after the recall repair, or if your dealer visit did not resolve the problem, document your ongoing symptoms and keep all repair orders.
Yes. A whining or howling noise from the transmission area during acceleration or coasting at 25–50 mph — most pronounced in 4th or 5th gear at 2,000–2,800 RPM — is documented for the 2023–2024 Canyon in GM Technical Service Bulletin 24-NA-002. The noise is associated with the 8L80 Hydra-Matic 8-speed automatic transmission paired with the 2.7L TurboMax engine. TSB 24-NA-002 directs the dealer to diagnose the vehicle using a specific procedure to verify the gear and RPM condition before performing any repair. No recall has been issued. If your dealer has visited this issue more than once without eliminating the noise, or if the noise continues after a prior repair, each return visit counts as a separate repair attempt for the same defect under California's Song-Beverly Consumer Warranty Act.
It may. California's Song-Beverly Consumer Warranty Act presumes a vehicle is a lemon when the manufacturer has made two or more repair attempts for a safety defect — such as phantom AEB braking that caused or risked a crash, or headlight flickering that violates federal safety standards — without fixing it during the warranty period. For non-safety defects like the transmission whine, the general standard is four or more repair attempts, or 30 or more cumulative days out of service. The 3rd-gen Canyon has been subject to multiple safety recalls across its ADAS, lighting, fuel, seat belt, and airbag systems. If your Canyon has been in for any of these issues more than once — or if a prior recall remedy did not resolve the problem — your repair record may already support a claim. If you prevail, GM pays your attorney fees under California law. This is general information only and not legal advice.
Yes. In addition to the phantom braking recall (24V133) and headlight recall (24V673), the 3rd-gen Canyon has been subject to several other recall campaigns. Recall 24V491 (June 2024) covers 2,492 model-year 2024 Canyons for a fuel tank lock ring that was not fully tightened at the factory, creating a potential fuel leak and fire risk in a crash. Recall 24V703 (September 2024) covers 56 model-year 2023 Canyons for a front seat belt buckle attachment bolt not torqued to specification — a safety-critical defect. Recall 25V856 (December 2025) covers 1,120 Canyon AT4X AEV Edition units from 2024–2026 for an SDM software error that can cause the passenger airbag to deploy with excessive force in a crash. Check all open recalls on your specific VIN for free at nhtsa.gov. Even if a recall repair has been performed, if you experienced symptoms before the remedy was applied, document them.
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