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.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
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.