I have replaced the front hubs on my 2000 Jimmy 4wd. The sheet from auto zone said to torque the center hub nut to 103 lbs. Every where in the forum they say 180 lbs. Which one should I use?

According to this online service manual it is 103 ft. lbs.

http://www.oplin.org/databases/proxy2/proxy.php?qurl=http%3a%2f%2farrc.epnet.com%2fautoa sp%2fframerq.asp

enter 123456789 for library card number, click submit, click submit on Hudson Library, scroll down to AUTO REPAIR REFERENCE CENTER, click on it and then choose yesr and model.

Hope this helps