The Kadett E formed the basis of the Daewoo LeMans (later known as the Daewoo Cielo, Racer and Nexia) in South Korea, Nexia being the hatchback version), which was sold in the United States and New Zealand as the Pontiac LeMans, and in Canada (initially) as the Passport Optima. LeMans sales ended in 1993. The Nexia is still being produced at UzDaewoo plant in Asaka, Uzbekistan. The Cielo was last being produced at Automobile Craiova, a semi-independent (from GM) plant in Craiova, Romania. Their license expired in the fall of 2006.
The GSi's engine mapping had been carried out by Opel tuning specialists Irmscher. A model with the 82 PS (60 kW) 1.4 L multi point fuel injected engine, which was otherwise mechanically identical to the GSi, also became available as the Nova SRi in the United Kingdom. In January 1988, a turbocharged version of the Isuzu diesel engine was introduced, with power increased to 67 PS (49 kW).