A064F766 | Genuine Cummins® Inlet Catalyst Module 15L ISX/QSX GMC Terrain and relays are in one

and relays are in one place:

Coolant loss with no visible leak

Purpose of using A028Y792:

The vehicle may speed up or slow down unexpectedly

A064F766 | Genuine Cummins® Inlet Catalyst Module 15L ISX/QSX GMC Terrain and relays are in oneDescription: An Inlet Catalyst Module A064F766 is a component in a vehicles exhaust emission system that helps reduce harmful gases coming from the engine before they reach the rest of the exhaust treatment system. Part Number: A064F766 Condition: New Manufacture Brand: Cummins Fits A064F766 For EPA21 15 liter ISX QSX Purpose of using A064F766: Transmit pressure to a sensor It carries pressure from a system (like exhaust or air) to a pressure sensor