"Out of an abundance of caution, customers should continue to park their vehicles outside immediately after charging and not leave their vehicles charging overnight," GM warned.
"They just want to get them going," Mike Van Boekel, chairman of Unifor Local 88, which represents about 1,500 hourly workers at the Canadian plant, said of the decision to use Kuka. "The orders are coming through so strong."
The pan-European STOXX 600 index rose 0.4pc to a new closing high of 452.57, having earlier hit an all-time high of 452.71. It added 0.8pc for the week.
Also, new applications for US jobless benefits fell below 400,000 for the first time since the pandemic started, while a service sector index came in at an all-time high in May.
The company reported $4.4 billion in operating profit for the first quarter. The new guidance indicates second quarter pretax profits will exceed $1.1 billion.
GM shares rose more than 2% in early New York trading after the announcement.
GM said it is restarting operations at four plants in the United States, Mexico and Canada starting next week. Two plants in Mexico will resume production next week that build the Chevrolet Equinox, GMC Terrain and Chevrolet Blazer.
The Detroit automaker released a series of new goals in its 2020 sustainability report, including reducing how much energy it takes to build vehicles and using returnable packaging.
The company said it wants to make packaging 100 percent returnable or made from mostly sustainable content by 2030. It did not have comparable numbers from 2020.
The automaker said its BlueCruise technology will be offered on its 2021 model year F-150 pickup trucks and the Mustang Mach-E electric crossovers equipped with its Co-Pilot360 driver assistance package.
Rivals General Motors Co and Tesla Inc also offer similar driving assistance technologies called the 'Super Cruise' and 'Autopilot', respectively.
Tesla's rivals and Chinese partners of General Motors, Toyota and Honda also follow NIO's lead to develop cutting-edge batteries that can allow automobiles to achieve the 1000km driving range on a single charge.