In December 2016 the trk a 2013 CHU with 505 18 spd fuller was at a service dealer for codes which I cant remember
Come to find out the airdryer was changed on the road because of failure of the original
A regular ad-9 was installed instead of the more advanced ad-9
Anyway while it was at the dealer they run a software or a program upgrade on the trk
After that the driver noticed a loss of power
So after listen to complaits I sent back to the dealer and they said it needed a new set of injectors at the time the trk had 163,000 miles
That was $6000 Still not back to normal Brought it to a different dealer and they put a turbo on it $5500 that seem to bring it back but not fully
It was showing 35 to 37 lb boost it should be 40
Complaints are starting again So I decided to ask about what was done in the computer upgrade or reprogramming
I have sort of hit a brickwall with that question.I was told to have it dyno checked so I might do that and go from there