Cruise control issues and re gear

[Unknown Traveler]

Hello, I have a 2019 3500 l5p. I did a gear change from 373 to 410. Now my cruise control will not work over 51mph . I bought the Edge pulsar programmer , and that fix the speedometer calibration but not the cruise control issue. So has anyone else had this issue and what is the fix for it. Thank you

[MCSarge]

On 6/28/2021 at 3:12 PM, Unknown Traveler said:

Hello, I have a 2019 3500 l5p. I did a gear change from 373 to 410. Now my cruise control will not work over 51mph . I bought the Edge pulsar programmer , and that fix the speedometer calibration but not the cruise control issue. So has anyone else had this issue and what is the fix for it. Thank you

When I did that in my Jeep I had to change the speedometer and also input the new gear ratio with my programmer.  If your Edge unit won't let you change gear ratio's the dealership should be able to reprogram it for you as 4:10 should be a common ratio for that size truck.  

[Unknown Traveler]

Actually I took it to the dealer. And I was informed that Chevrolet will not release info on the l5p Duramax to reprogram computers. If you know a dealership that will do that on a l5p in Southern California please let me know. Because I will go to them.