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Posted (edited)

I have a 2020 silverado LTZ 5.3 8 speed. 

 

When I have it plugged in it definitely disables the auto-shutoff stuff... But exhaust still sounds like it's going into 4 cylinder mode. 

 

Is there a screen on our console that shows how many cylinders are being used like previous years? 

 

EDIT: More investigation... Appears I have to send it into range and have them update the firmware. This device was previously used on a 2014 so I'd venture to say it's Atleast 5yrs old. Fortunately firmware upgrades are a free service. 

 

My current device is firmware 8.6.  Speaking with Range technical support... 9.0 is necessary for the 2020s.

Edited by Travis Crawford

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