U1064 on Chevrolet: How to Diagnose & Fix
Lost Communication With Body Control Module (Manufacturer-Specific)
1 Chevrolet model · 1 documented issue · $300-$1,200 repair
U1064 on Chevrolet by model: symptoms, diagnosis and fix
Owners of the 2004-2007 Malibu frequently report erratic gauges, warning chimes, power door lock issues, retained accessory power problems, and intermittent no-crank or lighting anomalies tied to BCM or cluster-related electrical faults. Symptoms can appear randomly and may worsen with low system voltage, poor grounds, or internal module failure. In some cases the instrument cluster itself develops intermittent operation or false readings, while in others the BCM causes multiple unrelated body electrical complaints at once.
Common Symptoms
- Erratic or dead gauges
- Random warning lights
- Door locks cycling or not working
- Accessory power staying on or shutting off incorrectly
- Intermittent no-crank
- Chimes sounding unexpectedly
How to Fix
Diagnosis should begin with battery and charging-system testing, followed by inspection of grounds and connector condition at the BCM and cluster. Scan for body codes and verify communication before replacing modules. Repairs may include BCM replacement/programming, cluster repair, connector pin tension correction, or ground cleaning depending on the exact failure point.
Sources for this issue (1)
U1064 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 U1064 mean on a Chevrolet?
U1064 stands for "Lost Communication With Body Control Module (Manufacturer-Specific)." U1064 is a manufacturer-specific network code that, on GM-family vehicles, indicates a module has lost serial-data communication with the Body Control Module (BCM). Each module is expected to send periodic 'I'm alive' messages, and when those messages stop arriving from the BCM for several seconds the code sets. Because the BCM controls many body and convenience functions, losing it can cause a range of electrical and feature problems. On Chevrolet it is documented across 1 model: Malibu.
What are the most common causes of U1064?
The most common causes of U1064 are: Corroded or loose BCM ground connection, Damaged Class 2 / data bus wire (chafed, pinched, broken), Faulty Body Control Module, Loose or corroded BCM connector pins, Low or unstable battery voltage, Water intrusion at connectors or module, Blown fuse feeding the BCM. The specific cause varies by vehicle.
How much does it cost to fix U1064 on a Chevrolet?
Published repair estimates on Chevrolet range from $300 to $1,200 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 U1064 on a different make?
View U1064 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.