U0028 on Chevrolet: How to Diagnose & Fix
Vehicle Communication Bus A
1 Chevrolet model · 1 documented issue · $300-$1,500 repair
U0028 on Chevrolet by model: symptoms, diagnosis and fix
The MyLink infotainment system on 2013-2018 Camaros can suddenly go to a blank/black screen with total loss of audio, touchscreen, and backup-camera functions. The typical stored code is U0028 (communication bus / serial data fault), pointing at the HMI (Human-Machine Interface) module, the central computer of the MyLink system. Voltage spikes from a dead/replaced battery or a jump-start commonly damage the HMI. Beyond the loss of features, the fault can keep modules awake and cause a parasitic battery drain. GM technical bulletin PIC6073E addresses U0028 on this platform.
Common Symptoms
- Black or blank infotainment screen
- No audio from the radio
- Backup camera not displaying
- Unresponsive touchscreen
- U0028 stored code
- Battery drain / dead battery overnight
How to Fix
Start with a soft reset (hold Home + fast-forward ~10 seconds until the screen goes dark). If the screen stays blank and U0028 is stored, the fix is usually HMI module replacement; the module is VIN-locked and must be programmed by a dealer or a specialized module shop. Check for chafed/corroded wiring and ensure a healthy battery to avoid repeat failures. A rebuilt/programmed exchange HMI is a lower-cost path.
Sources for this issue (1)
U0028 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U0028 mean on a Chevrolet?
U0028 stands for "Vehicle Communication Bus A." A general communication fault on Vehicle Communication Bus 'A' — a manufacturer-assigned data bus designation (which may be CAN or another protocol depending on the vehicle). A module set this code because expected messages on Bus A are missing, corrupted, or the bus is not communicating normally. On Chevrolet it is documented across 1 model: Camaro.
What are the most common causes of U0028?
The most common causes of U0028 are: Open, shorted, or corroded Bus A wiring/connectors, Bad or loose connector at a module on Bus A, Failed control module dragging Bus A down, Poor power or ground to a networked module, Out-of-spec bus termination. The specific cause varies by vehicle.
How much does it cost to fix U0028 on a Chevrolet?
Published repair estimates on Chevrolet range from $300 to $1,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for U0028 on a different make?
View U0028 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.