Brand New Yukon - Warning light driving home from dealership

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SCUCREW08

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Proud/Frustrated owner of brand new 2025 Yukon XL Denali with reserve package and air ride (not the capability package with the elocker, just air ride).

Anyways, bought the car on February 28th, picked up the next day on March 1st after detailing. On the ride home, I noticed that the forward "collision warning system unavailable" message was showing up, along with the warning light. Also intermittently it wouldn't flash that the "Rear Pedestrian Warning" was unavailable. The car lane assist wouldn't activate, nor would adaptive cruise, or supercruise. Also I noticed that speed limit signal were not showing up on the HUD. Drove the car for 6 days and brought it in last Thursday for the service appointment and to pick up the GMC all weather mats for all 3 rows.

3 days (business days), 5 calendar days later, and per checking in with them today, they still don't have a clue what is wrong. So frustrating to save for a 100k vehicle only to have it poop the bed on the drive out of the dealership. Not mad at the dealer, they gave me a rental car to use, but frustrated as hell at GM. Sorry to vent, but hoping/not hoping someone else has had this happen and they might have a solution!

Absolutely loved the car and the refreshed interior for the few days I got to drive it!
 

Bigburb3500

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This almost sounds like the truck didn’t have the full PDI service wasn’t done and something/one in the service department did not check all the boxes to turn on all your features?
 
OP
OP
S

SCUCREW08

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Yeah, they have been slowly going through each of the systems. At first they thought it might randomly be related to the rear seat entertainment (no clue how they came to that), but then they were thinking front camera, and then image processing sensor..., so far....we're still at square one....
 

LegalBrief

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They are being guided by the factory… it’s probably a bad module.. or shorted wire (or bad connector)… take time to trouble shot.

You could go talk to the general manager, he may step up (don’t count on it’
 

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