Join Date: Feb 2006
Location: Ft Worth
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If the truck is totally stock, then 15-17 should be around the max, however if your getting an SES light that goes right back out, that is prolly an overboost situation and should be setting a soft code. What are you using to pull the codes with?
Check the wastegate line to make sure its plugged in, its the red line running from the intake spyder back around to the turbo, if its off it will let it boost higher, but still that shouldn't be happening with a stock truck, you may have a chip on it or a tuner installed that you don't know about.
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05 King Ranch with some stuff on it.