EGR cooler bad????

[aeIAzdLZ]

I just pic up truck from the shop and didn't have time to check DPF and DOC
have to make short trip from Fl to Atlanta and will be back on weekend to do that.
When I pic up truck they did forced regen after installing EGR Cooler.
They told my they will use OEM cooler but look little different from old one
Is any way to check EGR Cooler if it's original?
I've checked after treatment history and that shows 3.0.3.8 4.0 3.6 and last one 1.2
Can you judge by that DPF and DOC conditions?
Also truck start to make wistle sound right before shift gears up ( no sound if it's shift on lower then 1500 rpm) transmission is autoshift. Check all clamps and they looks good