The core problem is intermittent or total loss of electric power steering (EPS) assist, which can make steering harder to control, especially at low speeds.
Understanding the problem
EPS systems replace the traditional hydraulic pump with electric components and sensors that determine how much steering assist to provide. When the EPS malfunctions, the steering can become heavier and harder to turn, or the assist can disappear suddenly, which is most noticeable at parking speeds or during maneuvers.
The following list summarizes common causes behind EPS issues seen in GMC vehicles.
- Faulty EPS control module or steering torque sensor
- Wiring harness damage or loose connections in the steering column
- Software glitches or outdated calibration in the EPS software
- Moisture intrusion or corrosion inside connectors or modules
- Mechanical wear in the steering column or rack affecting sensor readings
In short, the problem typically stems from electronics or sensor-related components rather than the hydraulic system, and it can affect a range of GMC models over multiple years.
Symptoms and safety risk
Owners should watch for several warning signs that may indicate EPS trouble. The list below outlines typical symptoms.
- Heavy or stiff steering, especially at low speeds or when parking
- EPS warning light or service EPS messages on the instrument cluster
- Intermittent or complete loss of steering assist
- Unusual noises, such as clicking or clunks, when turning the wheel
- Sudden changes in steering feel during driving
If you notice any of these indications, reduce speed, steer smoothly to a safe area, and seek service promptly. Persistent EPS issues can compromise maneuverability and increase the risk of a crash.
Recalls and service actions
GM has initiated recalls and service campaigns related to EPS faults in various GMC models over the years. Because the exact models and affected VIN ranges change with each campaign, owners should verify status for their specific vehicle.
To determine whether your GMC is affected, consider the steps below.
- Look up your vehicle’s VIN on the NHTSA recall database or the GM Owners portal.
- Check for active or prior EPS-related recalls or service campaigns by model year and trim.
- Contact a GMC dealership or certified technician to request a free inspection and potential replacement of EPS components or software updates.
- Follow official repair recommendations and schedule service promptly if a recall is indicated or if you experience symptoms.
Recall actions are vehicle- and year-specific, and they may cover software updates, wiring repairs, or replacement of the EPS module. Always rely on official notices for exact coverage and remedies.
What to expect during a repair
During EPS-related service, technicians may perform software reprogramming, update calibration data, replace faulty sensors or control modules, inspect and repair wiring connections, or replace the EPS unit. Most EPS repairs are performed with the vehicle supported by the dealership’s diagnostic tools and may be covered under recall or warranty if applicable.
Safety tips and driving guidance
While waiting for service or if you suspect EPS problems, keep these precautions in mind to reduce risk on the road.
- Do not ignore warning lights or persistent stiffness in steering.
- Avoid high-speed driving if steering feel is abnormal; use extra caution in parking lots and during turns.
- Have the EPS system inspected at a GMC dealer as soon as possible.
- Keep your vehicle’s software up to date when prompted by the dealer or GM’s owner portal.
Proactive maintenance and timely recalls help ensure EPS systems provide reliable steering assist and reduce the likelihood of a sudden loss of steering capability.
What owners and buyers should know
If you’re considering a GMC vehicle or currently own one, be aware that EPS-related issues have prompted recalls and service campaigns across multiple models and years. Verifying recall status, staying current with software updates, and seeking prompt dealer service if symptoms appear are the best steps to mitigate risk.
Summary
The GMC power steering issue centers on electric power steering faults that can lead to heavier steering, unpredictable feel, or a loss of steering assist. It has driven recalls and service campaigns across various models and years. Drivers should stay alert to warning lights and steering changes, verify recall status for their vehicle, and seek prompt attention from a GMC dealership for inspections or repairs related to the EPS system. Staying informed through official recall databases and GM’s owner resources is the most reliable way to understand and address any EPS-related concerns.