Check this thread it has a discussion and includes some part numbers from various places the Autozone part number is stated to be 2488. IF that the one you purchased an it's wrong then the problem is worse that we thought.

This thread is mostly about the problem of the 01 part number being listed incorrectly in nearly every parts catalog, including Isuzu's.
http://www.vehicross.info/forums/showthread.php?t=15129