Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
I changed my thermostats. I had a CEL and an error code(on torque app).
I removed radiator shroud, removed air resonator, unplugged A/C and moved compressor.
Afterwards, I have a CEL light with no error codes.
I clear "absent" code and start truck directly, no pause for glowplugs and it starts...