On 9/30/2016, a thermal event occurred while the bus was in the shop for routine maintenance. As the bus was being moved (backed-out) of the service bay and smoke was seen escaping from the CNG tank storage compartment at the rear of the bus. Location: 4127 elm St., dallas, tx 75226 a dallas area rapid transit (dart) employee quickly opened the compartment and extinguished the small flame. Damage was limited to the CNG fuel tank solenoid (melted) and the connecting harness (melted). This vehicle has a high pressure electronic shut-off solenoid valve mounted directly to the on-board CNG fuel tank(s). Note: If there is a fuel leak or other combustible material in the vicinity, there is a risk of ignition. Dart has a total of 123 ea., 2012 model year GM 6.0L chev express shuttle buses which were purchased from national bus sales & leasing by dart. Prior to delivery, the buses were modified by arboc and converted to dedicated CNG operation by impco automotive in union city, in. Each vehicle is configured with (2 ea.) Lincoln 21' X 80' CNG cylinders fitted with omb solenoid valves mounted inside an enclosed storage compartment behind the passenger area. There were similar occurrences documented under other recall notifications (GM bulletin #: 13139 and impco automotive #: 13V-225); where the oem identified root causes and corrective actions. Under those GM and/or impco reports and/or defect recalls reported to NHTSA, similarly, the connector to the CNG fuel tank experienced high-resistance short in the connector and caused overheating or in some instances a self-extinguishing flame.

- Dallas, TX, USA

Engine was at idle had pulled into gas station. Alarms went off check engine light came on, stable track error, multiple tones. After 20 seconds engine stalled. Would not crank. After talking to people and couple tries fix took to dealership as it was diagnosed to be the engine control module shorted. I had gone thru rain earlier and a couple storms passed thru while at station and eating. Dealer replaced engine control module and programmed it. This could of happened while driving and would of lost engine power and power steering. Since just module replaced and ben told it is know to short out when wet it could happen again.

- Belleville, MI, USA

The contact owns a 2012 Chevrolet Express. When the brakes were depressed and released, the vehicle began to shake violently. The contact mentioned that the stabilitrak activated independently after being turned off without warning. The vehicle was taken to dealer. The technician was unable to diagnose the failure. The manufacturer was not made aware of the failure. The approximate failure mileage was 47,000.

- Danville, WV, USA