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  • Location
    Southeast PA
  • Drives
    2015 GMC Denali HD LML

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jhplak325's Achievements


Enthusiast (5/11)




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  1. I had the same problem back in the middle of April after the dealer installed the illuminated sills, after some communication with GM about the issue, they released new installation instruction end of April and where you tap into for power is a different location. Dealer changed the location and have not had a problem since. illuminated sills 4-28-21.pdf
  2. 2019’s won’t fit and Chevy accessories website shows 84998769 for the rear wheel liners.
  3. Dual batteries on a gas engine is not part of the plow prep package.
  4. The trailer tire pressure sensors are an option from factory. If ordered from factory, the price is $50.00 for 4. If you buy them over the counter, then price is $150.00 for 2.
  5. Some info - https://www.gmupfitter.com/files/media/photo/1466/UI Bulletin_170.pdf
  6. Military, Educator and First Responder discounts are now only $500. Prior to this month they where the same as Supplier.
  7. Thanks and you have a sweet setup also! Really impressed with the 10 speed and how smooth it shifts. Definitely like the turn signal cameras, but my biggest thing is getting used to them.
  8. No difference in height between an AT4 and Denali on the HD’s.
  9. I just got this a month ago and pulled the camper for the first time this past weekend, unloaded and loaded it rides a lot better than the 2015 GMC Sierra 2500 Denali HD I had. Really impressed with this truck. 2021 GMC Sierra 3500HD on stock tires.
  10. Did you check the fuses? Park lamp left and park lamp right fuses are in the engine bay fuse box.
  11. Here is someone that has attempted the 2nd battery install.
  12. Looks like someone else has the same issue and posted about it yesterday
  13. Something came out the other day, but no detail on why the change on certain 2020 1500’s. https://gmauthority.com/blog/2021/04/gm-to-replace-towing-labels-on-certain-2020-chevy-silverado-gmc-sierra-pickups/ Ford went through something similar on 2020 Super Duties a couple of months ago and payload capacities.
  14. Here is some info - Just measured my 3500HD long bed and 22.5” to the center of hitch.
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