Exhaust brake - Chevy and GMC Duramax Diesel Forum
2017-19 GM T-K2 Platform Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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  • 1 Post By Full Time RVing
  • 2 Post By jwcgmc1985
  • 1 Post By hvtexskeeter
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post #1 of 8 (permalink) Old 01-09-2020, 06:25 AM Thread Starter
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Exhaust brake

Has anyone found a way to turn the exhaust brake on and leave it on so you don't have to set it every time you start it?
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post #2 of 8 (permalink) Old 01-09-2020, 06:44 AM
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post #3 of 8 (permalink) Old 01-16-2020, 11:14 AM
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I only use it when Im towing heavy stuff so don't need it all the time....
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post #4 of 8 (permalink) Old 01-16-2020, 05:26 PM
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When you enable the exhaust brake, don't forget to also engage tow/haul mode to maximize it's effectiveness.
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post #5 of 8 (permalink) Old 01-16-2020, 06:12 PM
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Quote:
Originally Posted by Full Time RVing View Post
Has anyone found a way to turn the exhaust brake on and leave it on so you don't have to set it every time you start it?
I can't tell you exactly how to do it but I can give you an idea to look into. I'm pretty sure it's a momentary contact switch that triggers the computer. You need a relay that closes the contacts that engage the exhaust brake, that's triggered by something that you do every time you drive. I'm thinking maybe a micro switch on the shifter that triggers the relay when you take it out of park. You probably want it to trigger momentarily as the shifter sweeps by and not constant contact. Someone more familiar with how the circuit works can advise you on that. As suggested above, I'd also connect it to tow/haul mode.
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post #6 of 8 (permalink) Old 01-16-2020, 06:13 PM
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...or perhaps a custom tune will do it.
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post #7 of 8 (permalink) Old 01-17-2020, 05:11 AM
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I just got in the habit of turning it on every time i start my truck.
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post #8 of 8 (permalink) Old 01-17-2020, 06:42 AM
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When not towing heavy you dont' need it. Just like Tow Haul you activate it each start up. two buttons to push is all.

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