Happy Friday everyone;

I ordered two CTS 's with different numbers for my car because both are listed as valid numbers:

LNA1600AA

AND

LRA1600AA

I think I have the LRA number from looking at what is there now, but I won't remove it until both parts arrive

Anyone know how to tell for sure which goes in a particular car?

Thanks

 

In JEPC, it just says that LRA1600AA is "M18" and LNA1600AA is "M12", which I can only assume should mean the thread. However, there's no mention of which VIN ranges each fit. I find that very odd, since the difference in thread size is probably significant: