How many miles do you have on the truck? With a load on you should be able to hit at or near 20psi of boost anytime you put your foot in it while in the top 3 gears. When mine was stock I would ALWAYS hit 20psi at full throttle REGARDLESS of the load/grade/ temp/any other reason while in 5th or 6th. If you have clean air and fuel filters, you DO have a problem. If your dealer won't help you, go to a different dealer. I pulled my 38ft 5th wheel a couple times while stock and never had to drop below 4th (8% grade) I could pull most hills in 5th.
Jerry
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2001 Quad Cab Dually, 6 speed ETH, SLT Plus, Isspro Pyro & 50lb Boost, Dual Fuel Pressure Guage, EZ Box, 275 injectors, Banks Power Pack, custom airbox, amsoil dual bypass, 4" DD exhaust, Horton fan, Ceramic clutch, Air Lift airbags.
'94 SLT 4x4 V-10, straight pipes and a K&N (can't find anything else
Jerry
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2001 Quad Cab Dually, 6 speed ETH, SLT Plus, Isspro Pyro & 50lb Boost, Dual Fuel Pressure Guage, EZ Box, 275 injectors, Banks Power Pack, custom airbox, amsoil dual bypass, 4" DD exhaust, Horton fan, Ceramic clutch, Air Lift airbags.
'94 SLT 4x4 V-10, straight pipes and a K&N (can't find anything else
