Engine/Drivetrain hard stutter at highway speed

[Ziggo]

Today I was driving from my home in Brownsville, TN to Southaven, MS with my family to attend a cheer competition for my two daughters. Driving at around 70mph, the typical instrument cluster/heads up display going dark issue happened, but this time the entire truck violently jerked as if the engine shut off but the drive train, considering everything was still locked into gear, pushed the engine over until the power came back on a split second later. That was the first incident. Three other times after that, the instrument cluster and heads up display went dark and came back on as if power was removed and it rebooted (individual objects on the display coming back on as the data from the CAN bus was received). 

 

Anyone else experienced the drive train jerking? Not good...this is a 2019 GMC Denali Ultimate for what it's worth...

 

Z

[PhantomSierra16]

5 hours ago, Ziggo said:

Today I was driving from my home in Brownsville, TN to Southaven, MS with my family to attend a cheer competition for my two daughters. Driving at around 70mph, the typical instrument cluster/heads up display going dark issue happened, but this time the entire truck violently jerked as if the engine shut off but the drive train, considering everything was still locked into gear, pushed the engine over until the power came back on a split second later. That was the first incident. Three other times after that, the instrument cluster and heads up display went dark and came back on as if power was removed and it rebooted (individual objects on the display coming back on as the data from the CAN bus was received). 

 

Anyone else experienced the drive train jerking? Not good...this is a 2019 GMC Denali Ultimate for what it's worth...

 

Z

So I had this issue with my 2016 GMC Sierra 5.3L, it happened maybe 3 times total within 2 years of ownership. I had told the dealership that such had happened, but they couldn’t diagnose it at first. 

 

Fast foward a month later, I’m about to leave my friends apartment underground garage, when all of a sudden my truck died. It wasn’t the battery, because the truck was able to start and stay on for a good 20-30 seconds before abruptly shutting off again! Had it towed to the dealer, turns out the “chassis module” had completely failed. I’m assuming it’s that module that could be the issue, it’s a vague diagnostic but it fixed my issue. I haven’t had such thing happen since.