Note, I spun this off into its own thread.
Quote:
I and others would be interested as my Duramax doesn't have one.
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His truck, being an '03 is set up different than ours. He has a conventional turbo-charger. Model yr 2004.5 brought out the variable vane turbo. They work different and can have issues with an "exhaust brake".
I have a Banks Speedbrake. It is entirely electronic.
Banks Power | Banks SpeedBrakeâ„¢
some folks like them, some don't. I like ours. Working with our Allison, I have had no issues.