Does anyone know what code reader works on these pre-96 cars. They are not
listed on the gm code readers, and I have the Check engine light on. Car
still runs fine but would like to know what has/is failing. So that I can
repair it. This car has been fabulous, except for replacing the water pump
and tune ups it has never been out of service, logging 550km per week for
the last 10 years.