I had work done at Rocky Mountain Cummins, last fall. Richard was the shop foreman. They did a good deed by finding the cam issue. However, there were a few problems that arose after the fact. I found that the charge air tubing was not secured completely, clamps swinging loose at the horn and the clamps that were attached were installed in such a way that they are very difficult to remove without removing the battery. I told them to reinstall the oil, and do not touch the oil filter as I had just changed them. They did not follow directions and used new oil and changed out the oil filter with their bottom line filter. If you take your rig there do an item by item check before you fire it up. I did not do that. $108/hour Shop Rate!
If you have electrical issues, D&D Auto Electric in Wheatridge, Colorado is the "Go To" shop. Close to I-70 and Kipling Street.
Central Motive Power, for Injector pump issues. Rocky Mountain Cummins sends their pump work there because C. M. P. is a Bosch Dealer. I have bought parts from them but have not actually utilized their mechanics. However, one of their mechanics helped me through the leaking KSB last summer and provided the schematics that I could post for TDR.
GregH