DEF Speed limiter

[Mitco39]

You and your retrofits! I remember seeing your work all the time when I hung out on diesel place and duramax forum. Not enough time in the day to spend as much time on there as I like. But if someone can figure it out I am sure its you.

[GMPX]

Guys, please take note of the warning......

You would normally only alter this table for engine conversions where different vehicle platforms require different messages to be enabled or disabled or engine swaps where no other GM modules are present.
** IMPORTANT ** DO NOT ALTER THIS TABLE IF YOU ARE UNSURE WHAT YOU ARE DOING, RESULTS OF SHUTTING OFF OR ENABLING MESSAGES MAY RESULT IN UNPREDICTABLE VEHICLE OPERATION.

[dansdieselp]

Maybe a ZF6 swap

[rcr1978]

Just figured I would update this, it's been a while since I've messed with this truck but it has been trouble free for 1500+ miles with no codes or speed limiters. I turned everything off related to scr/dpf ect....... still had speed limiters at 150-175 miles. If I remember correctly the trouble was the NOX sensor settings in the vehicle options folder that finally fixed it. Thanks to everyone that had any input if someone is struggling with this I will gladly help.

[catman3126]

Maybe a ZF6 swap

Now that would be badass

[HeavyD]

Newbie to this forum,,, please forgive me if this might be covered somewhere else... I had a 2013 LML tuned recently and now I have a message on the DIC stating that the Emissions System needs to be checked -175 miles to 65 mph. It counts down as I drive it but resets to 175 miles once the truck sits for a while. Also when flashing the truck, the code is gone while driving the first time post flash. Once you turn the key off for approximately 2-5 minutes and then turn back on the message is back on the DIC. Any suggestions or help would be greatly appreciated. Thanks!!

[dansdieselp]

Newbie to this forum,,, please forgive me if this might be covered somewhere else... I had a 2013 LML tuned recently and now I have a message on the DIC stating that the Emissions System needs to be checked -175 miles to 65 mph. It counts down as I drive it but resets to 175 miles once the truck sits for a while. Also when flashing the truck, the code is gone while driving the first time post flash. Once you turn the key off for approximately 2-5 minutes and then turn back on the message is back on the DIC. Any suggestions or help would be greatly appreciated. Thanks!!

We ran into this same issue on a 14. We fixed it by leaving egr valve and throttle controls enabled and unplugged every dpf, egr, and nox sensors and the 9th injector solenoid and the throttle valve. So anything relating to emissions unplug it. Don't forget the nox sensor on the firewall. Not sure what killed it, but no issue since then.

[HeavyD]

Thanks! Will give that a try and let you know!!

[Mitco39]

We ran into this same issue on a 14. We fixed it by leaving egr valve and throttle controls enabled and unplugged every dpf, egr, and nox sensors and the 9th injector solenoid and the throttle valve. So anything relating to emissions unplug it. Don't forget the nox sensor on the firewall. Not sure what killed it, but no issue since then.

I narrowed it down to the throttle valve. Keep that enabled and you're good to go.

[HeavyD]

Thanks guys,, much appreciated! We'll try reflashing it tomorrow and I'll post how it goes...