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what your describing does sound like a cac tube blew off. is there a tune on the truck? 30 psi is high for a stock truck. the 03 should be in the 24 range. did you check the tube under the air filter? that one usually is the second most common to come off and its the hardest to see. i'm assuming you would have noticed the one on the turbo if it was off. another thing to check is your up pipe connection. i've seen a couple times where those have broken from heat enough to cause low boost in the turbo due to not enough exhaust going through the turbo. it doesn't sound like your vanes are sticking. normally that will cause an overboost and lack of power condition. you would have noticed this without the trailer. hope tyhis helps.
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