Everybody that is using a mixed and matched gauge/sender that says everything is fine just means their motor never blew up. They don't know what oil pressure they have. "pegged" is not a number. Use a LS 6.0 compatible sender (electric) and gauge. Reface gauge for "orig look" or stick it under dash. I don't know if your oil pressure goes thru a computer or not. If you want a tubing style (mechanical), I'm sure you can adapt for that style gauge.
I searched O'Reilly's under 2006 2500 6.0 and they show Electrical and Mechanical gauges but only electrical sender/switch ?????? All are 0-100


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn