Fault code 2754 - CM2250

[Waterloo]

Get the iMap and the exhaust back pressure sensor. If you have not replaced the fuel doser at the turbo, do that too! There is a core deposit on the doser, so remove before taking to dealer, and you will have to drain off around 8 gals of coolant to remove. You need a vacuum set up to refill coolant properly.

Here is the vacuum set up I use with my Cobalt 90psi compressor, https://amzn.to/2F0V6Br
There are other setups for half the price on amazon. They all do the same thing, just need a homeowners compressor to use. A 20 gallon unit will get her done. Like this... https://amzn.to/2EZA0TS