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Chevy Silverado and GMC Sierra Surge/hesitation

jackouejackoue Posts: 5
edited March 12 in Chevrolet
I have an 03 Silverado 2500hd crewcab long box 4x4 with a 6.0L and aut trans
When the vehicle is loaded with the camper 2200lbs it has a buck/surge/hesitation between 2100-3000 rpm when the torque converter is locked.
The torque converter has just been replaced by the dealer...it has new plugs,plug wires, fuel filter, air filter, the trans was serviced.
The dealer now says its a normal caracteristic of the truck when the torque converter is locked...
I dont believe it....
I've owned other vehicles and hauled stuff..this is one uncomfortable ride when hauling
Any opinions or ideas...
Please and thank you

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