News Former Holden testing site off the market 14/09/2020 FacebookTwitterEmail The former General Motors Holden Proving Ground in Lang Lang has been sold to a startup Vietnamese car company. 184449_01 By Jessica Anstice The former General Motors Holden Proving Ground in Lang Lang has been sold to a startup Vietnamese car company. Automotive […] Subscribe or Login to see the rest of the content. Username Password Remember Me Forgot Password