Stability track and engine light on

[Porter]

I have 2017 3500 Denali when I shift to drive to pull out the D emblem starts flashing and barely moves. Now it want move with the stability trac light is on along with the check engine light on too. When I shift down to manual it shows L6 and want shift down to any other gear. Anyone have any ideas what’s causing this? 

[MaverickZ71]

Almost any powertrain diagnostic trouble code causes a check engine light and stabilitrack error. 

 

If GM installed a transmission fluid dipstick on your model, have you checked your transmission fluid level and condition?

 

If you subscribe to Onstar, push the Onstar button and ask them to run a remote diagnostic and give you the trouble code(s) that you can look up on the internet.  Otherwise, you'll have to have it scanned by a dealer or transmission shop you trust, and hope that a part costing $$ doesn't mean a rebuild costing $$$ or a replacement costing $$$$.  Keep in mind that cheap scanners used by auto parts stores and the like don't always correctly detect all of the control modules or a deeper trouble code.  

Edited March 19, 2021 by MaverickZ71

[Porter]

Thanks MaverickZ71 for the info. 

[DmaxHugh]

Get a cts2 or banks iDash and you’ll always know what’s going on with your truck. If it’s a nothing code you’ll be able to reset it too.


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