Maybe my misunderstanding?
A compression release engine brake
, frequently called a Jake brake
or Jacobs brake
, is an engine braking
mechanism installed on some diesel engines
. When activated, it opens exhaust valves
in the cylinders after the compression cycle, releasing the compressed air trapped in the cylinders, and slowing the vehicle.
From your link on GM Exhaust brake:
What the technology does is assist the truck in stopping while descending down hills to reduce the wearing of the truck’s brakes. It utilizes the diesel engine’s turbocharger back-pressure in an efficient matter, because hey, why let all of that energy go to waste?
Not sure those two are the same thing.......but maybe they are.