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Well over a month ago before I started looking into the whole towing/tuner/turbo breaking option I called my dealer so see if I could add a banks speed break and how it would affect warrenty. The service manager said if something failed it would nto be covered if they could find evidence of the speed break. He then told me he would look into seeing if they could get the Kodiak medium duty exhaust break to my truck:
The exhaust brake is a valve in the exhaust stream that closes to provide back pressure to the engine for the purpose of slowing the vehicle during descents on steep grades. 1) PCM/ECU provides power HSD (High Side Drive) to Exhaust Brake Relay coil if the following criteria are met: (Driver requested Exhaust Brake via Exhaust Brake Switch, TCC (Torque Converter Clutch) engaged,Throttle is low (less than 7%), Engine RPM greater than 1200 RPM, and ABS not Active) 2.)EBC provides ground LSD (Low Side Drive) to other side of Exhaust Relay coil when ABS is Inactive. 3.)TCM (Transmission Control Module) monitors ABS Active signal via serial data bus in order to disengage the TCC when ABS is Active. 4.)A green Exhaust telltale located in TTM (TellTale Module) will be lit when the Exhaust Brake is Active Exhaust brake contains exhaust restrictor RPO (NPE) functionality in that it can be used as a warm-up aid for Family school bus.
My Dealer called me today and wants to put this in my truck next Tuesday, he said it will be the first 08 LMM to have ti done to and if I didn't mind having it done to my truck they would do it for free if I give feed back reports.
I then asked him how this would affet warrenty and he said it will not be of any issues at all due to the fact that Gm is doing all the work and no power is being added to the truck.
As for now I only know that it will be added and will work in conjunction with a togle switch while in tow haul mode.
This could be an answer to what I have been looking for. I will keep you posted and be sure to hook up my 5er on Tuesday night for a trial run.
Any thoughts from you guys would be great.
Later
Phil
The exhaust brake is a valve in the exhaust stream that closes to provide back pressure to the engine for the purpose of slowing the vehicle during descents on steep grades. 1) PCM/ECU provides power HSD (High Side Drive) to Exhaust Brake Relay coil if the following criteria are met: (Driver requested Exhaust Brake via Exhaust Brake Switch, TCC (Torque Converter Clutch) engaged,Throttle is low (less than 7%), Engine RPM greater than 1200 RPM, and ABS not Active) 2.)EBC provides ground LSD (Low Side Drive) to other side of Exhaust Relay coil when ABS is Inactive. 3.)TCM (Transmission Control Module) monitors ABS Active signal via serial data bus in order to disengage the TCC when ABS is Active. 4.)A green Exhaust telltale located in TTM (TellTale Module) will be lit when the Exhaust Brake is Active Exhaust brake contains exhaust restrictor RPO (NPE) functionality in that it can be used as a warm-up aid for Family school bus.
My Dealer called me today and wants to put this in my truck next Tuesday, he said it will be the first 08 LMM to have ti done to and if I didn't mind having it done to my truck they would do it for free if I give feed back reports.
I then asked him how this would affet warrenty and he said it will not be of any issues at all due to the fact that Gm is doing all the work and no power is being added to the truck.
As for now I only know that it will be added and will work in conjunction with a togle switch while in tow haul mode.
This could be an answer to what I have been looking for. I will keep you posted and be sure to hook up my 5er on Tuesday night for a trial run.
Any thoughts from you guys would be great.
Later
Phil