Hello. today at work a Tahoe came in with what the customer described as "smoke coming from underneath the dash" and truck. After doing some diagnosing it was found the fuel pump was out. that was replaced. went to fire up truck and it ran for about 10 seconds before popping the 30 amp fuse. We traced the short to a box on the frame rail which is obviously part of the whipple charger. It is on the frame rail next to a valve that is connected to the fuel systems return line. If anyone can help in telling me what this box is and what is for (regulating fuel pressure?) and maybe have installed one and has an actual diagram of what all is spliced into I would really appreciate it.