My 01L seemed to be a little off since new ( now has 2800 miles) it buries the stock guage but the autometer would get to 10#s and that was all. I had been attributing this to the fact that we have so much humidity here in S. Fla and generally "Bad Air" however yesterday I decided to play with the boost actuator and low and behold it was all the way down from the factory. I adjusted it so the arm was just touching the stop ,I played around a little with getting it set, drove the truck and it now makes 11#s of boost and the a$$ometer can really feel the difference...

 

i was thinking about playing around with the boost actuator, but i don't know where to look for it at.

 

Hey Bolt
the actuator is on the drivers side near the firewall next to the blower.http://Home.midsouth.rr.com/lightningpage this page has photos under the tips section