The vehicle, a Tavera, was on its way to Jammu from Srinagar and it fell into a 300-foot gorge at the Battery Cheshma area of the district around 1.15 am, they said.
GM India said it has already sent individual letters.
With this, the death count in the August 2 night tragedy has gone up to 28, while 12 people are still missing.
General Motors India, 100 per cent subsidiary of General Motors Corporation, on Thursday said the company's entry level Chevrolet Spark has crossed the mark of 3 million customers globally.
The NIA also conducted a raid at the residence of Shiv Sena leader and former 'encounter specialist' of Mumbai Police, Pradeep Sharma in connection with the Antilia bomb scare and Mansukh Hiren murder case on Thursday, sources said.
General Motors India on Tuesday increased vehicle prices by up to Rs 61,000 in order to partially offset the impact of rising input costs and expiry of reduced excise duty concessions.
GM has invested $1 billion in the country since 1996.
Exports in August were up 10.3 per cent to 12,472 units from 11,305 units in the same month of previous year.
During September, Maruti said it dispatched 1,375 units of the soon-to-be-launched sedan Ciaz.