The GMT800 generation of General Motors’ fullsize trucks and SUVs is one of the most popular among truck enthusiasts—and for good reason. They’re thoroughly modern vehicles, but still relatively easy ...

A few months back we detailed the buildup and testing of our street 4L60E trans with help from our trans man Jimmy Galante and parts from Sonnax and TCI Automotive. But that was only half the battle.

Cheap(er) gasoline yep, it is a reality and the lower cost is certainly comforting after crude oil prices sat at record highs for many years. New sources for American oil, which exploration began ...