Short answer: The biggest problems with the 2023 GMC Sierra are engine problems, electrical system issues and transmission problems.
Engine problems are the most common while electrical system issues and transmission problems aren’t as common.
Some of these problems have even resulted in recalls: GMC has issued three in total, one for engine failure, one for a defective low brake fluid warning light, and one for daytime running lights.
The 2023 GMC Sierra is a popular choice for consumers seeking a capable and comfortable truck. While many Sierra vehicles deliver on that promise, some unfortunately fall short due to defects.
In this article, we summarize the most commonly reported defects so that you can be a better-informed owner or potential buyer.
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Common 2023 GMC Sierra Problems
2023 GMC Sierra Engine Problems
Owners of the 2023 Sierra reported sudden engine failure, knocking, and stalling. These issues can disrupt driving and may signal deeper mechanical defects that should be addressed quickly.
Sudden Engine Failure
- Severity: Moderate to severe; depending on where the engine fails, this could leave drivers stranded or at risk of an accident.
- Manufacturer’s Response: GMC issued recall 25V-274 for engine issues connected to manufacturing defects in the connecting rod and/or crankshaft engine.
- Fix: Dealers will inspect the engine, and if it fails inspection will repair or replace it; vehicles that pass inspection receive higher‑viscosity oil, a new oil fill cap, and a new oil filter at no charge.
Engine Knocking, Stalling
- Severity: Moderate; knocking noises or stalling are usually less immediately dangerous but can signal internal engine defects that should be addressed.
- Manufacturer’s Response: The 25V‑274 recall applies to engine defects that may include knocking or power loss before failure.
- Fix: Have the engine inspected and potentially replaced per the named recall.
2023 GMC Sierra Electrical System Issues
The most common electrical complaints involved the tailgate opening unexpectedly and instrument cluster malfunctions. These issues may affect driver visibility or vehicle control.
Tailgate Opens on its Own
- Severity: Slight to moderate; depending on when or where the tailgate opens, cargo could escape the vehicle and create obstacles for others on the road.
- Manufacturer’s Response: GM has a Technical Service Bulletin 23‑NA‑112 covering unwanted tailgate opening due to water intrusion into the tailgate switch.
- Fix: Replace the tailgate release switch or related hardware per the TSB instructions.
Instrument Cluster Issues
- Severity: Slight to moderate; losing access to the speedometer and other warnings can make it difficult for the driver to make accurate driving decisions.
- Manufacturer’s Response: GMC issued TSB PIT6028A to address blank or inoperative instrument panels by reprogramming the cluster.
- Fix: Reprogram or update the instrument panel cluster software per the TSB.
2023 GMC Sierra Transmission Problems
Drivers reported trouble shifting gears, a problem that can affect drivability and may indicate internal transmission wear or calibration issues.
Trouble Shifting Gears
- Severity: Moderate; difficulty shifting can affect acceleration and control, although not typically as dangerous if gradual.
- Manufacturer’s Response: There are multiple TSBs for various Sierra transmission or power‑train diagnostics, but none directly address a known systemic defect for 2023 Sierra gear‑shifting issues.
- Fix: Dealers should perform a full transmission inspection including fluid level/condition and internal components; replace or repair parts as needed.
What Sierra Owners Say
“The check engine light is illuminated. Diagnostic information from the OnStar system indicates a fault within the engine cooling system. The engine cooling fan remains engaged continuously, suggesting a possible malfunction with the cooling system components or related sensors.”
“The valve body in the transmission failed at 28,000 miles. My name is attached to an additional same exact vehicle where transmission failed. These transmissions should be recalled due to loss of propulsion. The dealership service lots are full of vehicles with the same failed transmission.”
“2023 GMC 1500 Sierra Denali Ultimate tailgate opens without being commanded. This has happened approximately three (3) times in the last two months while being driven with the most recent incident occurring today, 04/27/2025. There are no warning lights indicating when a tailgate opens while the vehicle is being driven.”
Protecting Your Consumer Rights with the Lemon Law
The lemon law process usually begins when a vehicle shows a defect that keeps resurfacing despite repeated repair attempts.
Once an issue becomes persistent, especially if it affects safety, drivability, or the value of the vehicle, the owner should keep detailed records of every visit to the dealership, including repair orders and the number of days the car spent in the shop. These documents form the foundation of any potential claim.
After gathering the paperwork, the owner can have a lemon law attorney review the history to determine whether the vehicle likely qualifies.
If it does, the attorney will send a formal demand to the manufacturer asking for a remedy such as a buyback, a replacement vehicle, or compensation.
Most cases resolve through negotiation, but if the manufacturer refuses to cooperate, the attorney can file a lawsuit to enforce the consumer’s rights.
Although the process may seem intimidating, having proper documentation and legal guidance makes it manageable.
Lemon laws exist to protect consumers when a defective vehicle can’t be fixed, and a well-supported claim can lead to a fast and meaningful resolution.
| Affected Model | Average Lemon Law Settlement (1.75x) |
| 2023 GMC Sierra | $96,498 |
*Please note, the figures presented in the chart are approximations based on past case results and should not be interpreted as a prediction or guarantee. Each case is unique and requires personalized legal guidance.
Get Back on Track with the Lemon Law Experts
The lemon law process is designed for consumers to have a route for getting back on the road after they are sold a defective vehicle.
Like any other legal process, it can feel complicated and stressful at times. Having the right attorney by your side can make the whole process much smoother.
The Lemon Law Experts are here for you and would love to assist you in bringing your claim: contact us today by calling (877) 885-5366 or by filling out a form online on our website.
