2026 GMC Sierra

The vehicle's over-the-air (OTA) software update system notifies users of available updates, but the behavior where the radio stays on after delaying the install is not disclosed before purchase. Owne...

GM provides at least six separate privacy statements for US users across different services, making it hard for buyers to navigate and understand the company's overall data practices before purchase. ...

The OnStar Privacy Statement, which details data handling for the connected services system, is not included in main vehicle documents and must be accessed separately. Buyers cannot easily review thes...

The auto start-stop system automatically shuts off the engine at stops to save fuel but reactivates every time the vehicle starts, requiring drivers to manually disable it with a button each drive. Ow...

Auto start-stop unexpectedly shuts down the engine just before takeoff at lights or during maneuvers like parallel parking, startling drivers and disrupting expected behavior.

Super Cruise, GM's hands-free driving system, falsely alerts drivers by vibrating the seat and flashing red when changing lanes safely, alarming them unnecessarily.

The blind spot monitoring system briefly shows yellow warning lights on mirrors at startup but fails to illuminate or alert during highway driving when vehicles are in blind spots.

The door chime dings repeatedly at an excessively loud volume if front occupants aren't buckled before starting, overpowering normal conversation and potentially worsening hearing issues; no simple wa...

Battery-installed devices to disable auto start-stop prevent auto-heated seats and steering wheel from working during remote start.

The GMC Sierra's infotainment system, which controls navigation, audio, and vehicle settings via a large touchscreen, often becomes unresponsive to touch inputs. Owners report volume changing on its o...

The built-in Google Maps navigation in the GMC Sierra's infotainment system loads and responds extremely slowly when searching for locations or starting routes. Owners find it frustratingly laggy comp...

Apple CarPlay, which mirrors iPhone apps like navigation and notifications to the vehicle's screen, fails to connect reliably or show notifications in the 2024 GMC Sierra. Owners also report intermitt...

The infotainment system in some GMC Sierra models refuses to pair with Apple CarPlay or Android Auto, forcing use of the less desirable built-in Android Automotive OS with Google Maps.

Bluetooth audio playback through the GMC Sierra's infotainment system starts clear but becomes muffled over time, degrading the listening experience.

Super Cruise, GM's hands-free highway driving assist, immediately disengages when the driver touches the accelerator pedal to adjust speed. This makes it hard to maintain desired speeds without interr...

During lane changes with Super Cruise active, the system waits until the vehicle is fully in the new lane before resuming acceleration. This causes unnecessary hesitation in passing maneuvers.

Super Cruise applies full throttle power immediately when accelerating during lane changes, which feels too aggressive for the driver's intended speed adjustment.

The auto start-stop feature, which shuts off the engine at stops to save fuel, must be manually disabled via the infotainment screen each time the vehicle starts, as there is no setting to keep it off...

The GMC Sierra's over-the-air (OTA) software updates for the infotainment system often fail to download or install, showing errors like 'Unable to Update' or greyed-out options. Owners report needing ...

When an OTA update is available or after installation, the Sierra's radio and infotainment screen fail to power down after turning off the vehicle, draining the battery or startling owners. This requi...

GM's OTA updates have incapacitated thousands of vehicles including Sierras, leaving radios locked in recovery mode and draining batteries completely. GM is changing procedures due to these widespread...

The infotainment popup for available OTA updates lacks essential buttons like 'install now', 'turn off radio', timers, or permanent dismiss options, forcing owners to endure nagging prompts without cl...

GM's terms allow OnStar or the manufacturer to push OTA software updates remotely without notice or consent, potentially erasing stored user data with no responsibility taken by the company.

Some Sierra owners refuse OTA updates due to suspicion that they primarily benefit GM rather than improve the vehicle, preferring to avoid potential risks.

OnStar Smart Driver is a GM feature that monitors driving habits like speed and braking. Owners complain it shares this data with LexisNexis, leading to higher insurance rates without consent.

GM's Android-based infotainment system collects personal data from vehicle use. Complaints state GM sells this data to Google.

Over-the-air (OTA) software updates allow GM remote access to vehicle software. Owners fear this enables monitoring of driving habits shared with insurers or law enforcement.

OnStar is GM's connected service that collects personal details like name, address, geolocation, biometrics, and sensitive traits. Mozilla reports it gathers this for marketing without clear consent.

GM collects detailed vehicle telemetry including VIN, routes, speed, braking, camera images, and sensor data via OnStar and infotainment. This raises privacy concerns over surveillance.

GM analyzes collected data to infer preferences, psychological trends, intelligence, and abilities. This is used for targeted marketing, per privacy audits.

GM sells and shares personal data with third parties for marketing. Owners and audits confirm this practice without adequate consent.

GM shares location and vehicle data with law enforcement and agencies like ICE upon request. Mozilla notes frequent compliance without user knowledge.

GMC vehicles have interior cameras and microphones active for data collection. Privacy reports warn they enable constant snooping on owners.

GM does not allow easy data deletion for most US owners outside CCPA regions; a consumer privacy request form is available for data access and deletion requests.

The OnStar system and GMC allow remote access to your vehicle's software and systems. Owners complain that the manufacturer can modify, update, or change vehicle software without notice or owner conse...

OnStar is GM's connected service for emergency calls, navigation, and diagnostics; Driver Assist includes features like Super Cruise hands-free driving. Owners report OnStar button turning red and bec...

The infotainment system controls radio, music, CarPlay, and chimes like turn signals. Owners frequently report intermittent loss of all audio—no music, blinker sounds, or chimes—requiring restart, oft...

The built-in Spotify app streams music directly through the infotainment system via OnStar connectivity. A confirmed backend issue caused it to suddenly stop playing for many users, unrelated to the v...

Over-the-air (OTA) updates push software improvements wirelessly to the truck's systems. Owners report updates failing to install over days, causing symptoms like radio staying on after shutdown or in...

The large touchscreen infotainment system runs the radio, navigation, and apps. Older models reportedly develop glitches and eventually fail completely, requiring full unit replacement every few years...

GM previously added ~$1500 multi-year OnStar to sticker prices on some pre-2025 models even if unwanted; 2025+ vehicles including 2026 Sierra include core OnStar features (e.g., remote access, connect...

Wireless Android Auto, advertised as a feature on 2024 Sierra models, stops working after the OnStar trial ends, requiring a paid subscription to restore connectivity. Owners report connection failure...

The built-in map navigation and Heads-Up Display (HUD) integration on 2026 Sierra models require an ongoing OnStar subscription after any initial trial or basic plan period. Features stop working with...

Remote vehicle access via the phone app requires a separate $15/month OnStar subscription after trials end. This contrasts with competitors offering it for free.

New Sierra owners must spend significant time on phone with OnStar to set up Google accounts for basic infotainment features like HUD, creating activation barriers.

OnStar service frequently drops, disrupting built-in WiFi hotspot and infotainment functions like CarPlay adapters multiple times a week on 2025 Sierra.

OnStar sales reps mislead buyers by advertising 'unlimited' internet packages that are actually capped at 2GB/month on new GMC Sierra trucks.