A shock absorber not only is one of the hardest-working components on your truck, it also is one of the most misunderstood. But heres one thing we all understand: Upgrading your trucks shocks is almost always a very good thing to do. With that in mind we got in touch with Explorer Pro Comp and obtained a set of that firms ES 3000 shocks, which we installed on a 72 Chevy ¾-ton pickup that was wearing four worn-out shocks up front.