Looking for color codes for red interior 66 442 convertible, I understand there are four codes in all. Does anyone have the codes?

 

985, strato bucket seats. No other code for red in 3867 model.

 

The red interior trim code with all vinyl seats is 15, the 1 is for vinyl and the 5 is for red, from the 1966 GM recommended interior color combinations chart in the Sullivan 442 resto guide.
Are you looking for the interior paint color codes?
If so TCP Global has an auto color library with pics of the original paint chip sheets, interior paint codes are on the reverse side.
They changed the search some at TCP, instead of going to Oldsmobile on the dropdown list go to "gminterior" then your year.
Some brainiac at TCP figured it would be better not to have the list in alphabetical order now too.

http://www.tcpglobal.com/autocolorlibrary/default.aspx#