RE: Remove 90MPH top speed limitation off of 2008 Silverado
With a high axle ratio like 410 or 456, the manufacturer is probably just trying to protect the drivetrain. Assuming you have a 373 or a 342, and you're not redlining your tach, what's the practical purpose of making a pickup truck go over 100MPH? Is there an Autobahn in the US somewheres which I don't know about?
Many jurisdictions add a reckless endangerment or reckless driving summons to your speeding ticket at those velocities, so beware. Word to the wise, radar detectors ain't foolproof protection.