Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_41 ( co_drivers VARCHAR, pos VARCHAR, class VARCHAR )

### Question ###
Who was the co-driver in the DNF position in the GT1 class?

### Accurate SQL ###

SELECT co_drivers FROM table_name_41 WHERE pos = "dnf" AND class = "gt1"