Hi everyone. I've had a XR4046 for several years now but it's acting up. I too have the same 8 pin (6 active) pigtail on the right lower part of my dash. It took a lot of research and a little luck but I picked up the part today. LS part 40268283 CONNECTOR-DIAGNOSIS (ISO)-TR. I couldn't find this on the LS website part finder but you can order it. It will convert the 8 pin adapter to the round 9 pin diagnostic port for the diesel code readers. I paid around $94. I plan to test it tomorrow.