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I am reaching out to our community. If you own a model year 2020 Silverado/Sierra 2500/3500 DURAMAX Please attach a video clip of the instrument cluster while traveling down a grade(hill) and applying the brake briefly to activate the Auto grade brake feature. I am really looking for early production vehicles here but any and all that are MODEL YEAR 2020 will help, the earlier the better. This will not take long and your help will be GREATLY appreciated!! Please note the production date of your vehicle this can be found on the B-pillar placard. Also if the vehicle has been into the dealership for any service/recall/SIB that required your vehicle to programmed(updated software) please note that as well. THANK YOU!!!!!!

Edited by JRSPerf.
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