According to the first statement (below) obtained by Autoblog from GM, the issue stems from the HVAC system in Hummer H3 models. The connector module for the blower motor has, in certain cases, overheated, melted the surrounding plastic, and started a fire. 42 such cases have been reported, including three instances of occupants citing minor burns.
GM confirms that two of those three cases lead to the vehicle being destroyed in the fire, but states that no crashes or fatalities have resulted. The issue affects 196,379 examples of the 2006-10 H3 wagon and the 2009-10 H3T pickup, with 164,993 estimated to be in the United States. In order to fix the issue, dealers are being instructed to replace the relevant parts of the connector and harness.
In a second, unrelated campaign, GM is also calling in 50,731 Chevy Spark and Sonic small cars – 45,785 of them in the US – due to a software glitch. In those affected vehicles fitted with the base radio and OnStar system, the audio system may not be able to switch out of turn-by-turn direction mode, causing the display to go blank and all sound to mute – including key safety warnings. In addition, the system may not switch off, draining the battery. GM states that no crashes, injuries, or fatalities have resulted from this issue, and all that dealers will need to do in this case is reflash the software.
General Motors is recalling 45,785 2014-2015 model year Chevrolet Sparks, and 2015 model year Chevrolet Sonics in the U.S. In certain vehicles with base radios and OnStar, the radio software may cause the radio to lock up in the OnStar Turn-by-Turn Directions mode. If this occurs, the radio display will go blank and all audio functions will cease, including vehicle chimes related to warnings for a key left in ignition and driver safety belt not in use. In addition to the vehicle chime malfunction, the radio may not turn off. This could drain the battery and possibly prevent the vehicle from starting. Dealers will reflash the radio software. GM is unaware of any crashes, injuries or fatalities related to this condition. Total population of the recall, including 4,568 vehicles in Canada, is 50,731.