Maruti's dominance, small car bias & global issues make India a tough market for big auto MNCs
Look at Volkswagen, Skoda, FORD, FIAT and Nissan - their combined market share is only 7% where the top two (Maruti Suzuki and Hyundai) control 65%.
An interesting article from The Economic Times.
GM will shut down its plant in Halol in Gujarat. It has been struggling in India, selling only 26.000 cars in 2016-2017.