Since its an LLY you need to read the two write ups by Killerbee about Thermal Feedback on the LLY. This is whats causing the heat up at WOT or Higher speeds with more boost.
Read the two attached files in this link from Killerbee, you will be amazed with how much better your truck performs with the couple of free fix's in a very bad design on the LLY intake. Performance, Intakes, Thermal Feedback, LLY Mouthpiece
__________________  08 Chevy Silverado 2500HD Crew 4x4
6" Fabtech Lift, Pro Comp 35" Tires Extreme A/T & wheels
ATS Extreme Trans w/CoPilot
Quadzilla Stealth 2
4" Turbo Back Silverline System
BD-Performance Exhaust Manifold
Kennedy Diesel Air box Mod & Resonator plug
6k/8k HID Headlight Upgrade |