2026 GMC Terrain

The 2026 GMC Terrain does not come with a physical owner's manual in the vehicle. Dealerships charge $50+ for a copy or direct buyers to download it via the infotainment system, which often fails, lea...

Owners report dealerships charging high fees like $700 for mandatory software updates that must be performed on-site, with no clear indication these costs are required post-purchase.

The infotainment system's Bluetooth in some Terrain models only supports phone calls, not music streaming, despite higher trims offering full functionality including Pandora integration.

GM scatters privacy information across at least six separate hard-to-navigate statements, making it difficult for buyers to understand data collection, sharing, and connected services practices before...

The automatic emergency braking system, designed to detect obstacles and stop the vehicle, activates unexpectedly without any cars or hazards present. This causes sudden tire-squealing halts at speeds...

The brake assist system alerts appear erroneously on the dashboard, often after auto stop/start or while driving. These pop up alongside parking assist or steering warnings, causing owner concern with...

The auto stop/start feature shuts off the engine at stops but fails to restart, often with a click sound and no cranking. This strands drivers in traffic, especially after low fuel or short drives, re...

Lane keeping assist fails to alert or steer correctly despite activation, showing only a yellow light or gray line on the dash. It doesn't vibrate the wheel or correct path even above 40 MPH on highwa...

The auto stop/start system reactivates every drive, lacking a permanent disable option. Owners find it annoying and seek aftermarket plugs or hope for software updates to keep it off.

The Terrain's center console USB ports often fail to recognize phones for media or CarPlay, preventing the media option from lighting up on the screen. Owners report error messages like 'liquid detect...

Bluetooth connectivity in the Terrain frequently cuts in and out, especially in the first few minutes of connection, or fails entirely for media streaming despite working for calls. This affects vario...

The 2026 Terrain requires using the touchscreen to control headlights, with no physical button available. This touchscreen dependency adds friction during driving.

Drive mode icons on the 2026 Terrain's touchscreen resemble push buttons but do not activate, instead redirecting users to a separate mode selector. This misleading design confuses users expecting dir...

The 2026 Terrain's hill descent control fails to engage immediately, allowing the vehicle to roll several feet downhill first. Users must accelerate into the hill to compensate, creating unsafe fricti...

The 2026 Terrain's all-wheel drive system defaults to two-wheel drive and does not engage automatically even with slippage, requiring drivers to manually push a button. This extra step risks users for...

The 2026 Terrain Denali lacks a sport mode in the drive mode selector, despite having 20-inch wheels that could benefit from it.

The 2026 Terrain's 360-degree camera system has subpar graphics and resolution quality, reducing its effectiveness for parking and maneuvering.

The 2026 Terrain lacks release levers for folding down rear seats, forcing awkward reaching over seats to access them.

The 2026 GMC Terrain receives over-the-air (OTA) software updates via the myGMC app or infotainment system to improve features and fix issues. Owners report frequent failures where updates fail to dow...

The GMC Terrain's connected systems, including OnStar, myGMC app, cameras, microphones, and sensors, collect extensive personal data like geolocation, biometrics (fingerprints, faceprints, voiceprints...

OnStar automatically shares owner location and other data with law enforcement and government agencies like ICE without user consent in many cases. This raises privacy concerns for surveillance by aut...

GM sells and shares personal and vehicle data with third parties like SiriusXM, insurers, and marketers for advertising and other business purposes, often qualifying as 'sales' under privacy laws. Use...

Most users cannot delete their collected data from GM systems or the myGMC app, with deletion only possible in regions like CCPA or GDPR; otherwise, data is retained indefinitely for business and lega...

In 2022, GM suffered a major data breach exposing customer names, addresses, favorite locations, mileage, and service history, highlighting security risks for stored personal and vehicle data.

The infotainment system, which controls navigation, audio, climate, and cameras, frequently goes black or displays a blank screen while driving or at startup. This leaves drivers without access to key...

The central infotainment screen unexpectedly reboots or requires full resets during drives, temporarily disabling controls for audio, AC, CarPlay, and profiles. Owners report monthly resets on new 202...

Apple CarPlay and phone connections drop randomly, preventing use of navigation, music, or calls until a full system reset. This affects both wired and wireless connections, with iPhone crashes report...

Individual speakers or all audio intermittently cut out, affecting music, calls, and navigation sounds, even after replacements and software updates. Single speakers fail randomly, while full audio lo...

The SD card slot errors out, disabling navigation and CarPlay, while front USB chargers and aux ports stop working. Dealerships suggest costly receptacle replacements without guarantees.

The infotainment screen glitches or distorts when releasing the brake after stopping. This occurs alongside other highway noises but is tied to screen display issues.

The vehicle's OnStar telematics module, which powers GPS navigation, emergency calling, and location tracking, fails shortly after purchase. Dealership requires replacement, disabling SOS and app conn...

Remote start and other app features like locking require an active OnStar subscription fee. Owners of newer models lose access after trial ends or service cancellation.