Quote Originally Posted by jaros44sr View Post
dont know what a L31 is ... sorry for the confusion
The Vortec 5.7 liter engine used in GM Pickups, Suburban's, Tahoe's, and Express Vans from 1996 ~ 2002 is also known as the L31.

Don't think twice about the confusion. We like to help, but knowing the parts involved is essential.

dave w