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14 hours ago, NHM25 said:

I may have everyone beat on my timeline to frustration. Just purchased new 2020 GMC AT4 from Van GMC Buick in Scottsdale 3 DAYS AGO! The assembly date is June 20, 2020! It ran great the first two days... day 3, won't start. Total of 170 miles on the truck. Same issues that everyone has noted. Came outside, tried to open her up with the key fob and the battery was completely dead. Had to open manually. Push start did not function, no power whatsoever... basically a $65k brick in my driveway.

 

Connected battery to wife's Explorer and got the dash to light up but it wouldn't start. Tons of error messages. Kept trying to start it and it finally lights up... but was running very rough with knocking. This morning, started it up and it ran great. Dropped it off at dealer and they tell me there are no codes, it's running fine, the alternator and the battery look good. So I send them the videos below and a link to this thread... No word yet but will keep you all posted. So incredibly frustrating. Love the truck but now have to worry about this... what happens if it doesn't start when my family and I are in the middle of the woods camping/hunting? Ridiculous. 2020 could not get any worse. 

UPDATE: Dealer thinks they found the problem: Loose UBEC Bolts. There was a recent bulletin posted on 6/26/20 about this that may be the cause for this issue as a whole. Ask for document ID 5628169 or the following title for the GM bulletin: #PIT5756: Various Electrical Concerns (Inspect UBEC Bolts for Being Loose) - (June 26, 2020).

 

Condition: Some customers may comment on any number of electrical related symptoms. The following are some of the known reported ones:

  • no crank
  • no start
  • starter grinds or re-engages after engine starts
  • SES MIL
  • IPC guages sweep/fluctute and/or various IPC warning lights or messages
  • High or low system voltage
  • May have any of the following DTC's: B1325, B2750, B305D, B297B, C0049, P0562, P0700, U0100, U0101, U0102, U3006
  • some of these concerns may be noticed with powertrain movement, like when accelerating or braking. 

 

Cause: These concerns could be caused by the X50A underhood fuse box bolts being loose. The X50A has built in indicators which pop up as the X50A bolts are tightened down, to inidcate the X50A is fully installed. In some cases, even if these green indicators are popped up, the bolts may still be loose. 

 

Correction: Inspect the X50A Underhood Fuse Block bolts and verify they are properly torqued to 53 lb in (6Nm)

 

Dealer stated that my box was indeed loose (that's what she said). Has not been able to replicate issues. Really hoping this is the fix for my truck and all of yours. Will update forum either way. Best of luck. 

Edited by NHM25

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On 7/3/2020 at 5:21 AM, Colossus said:

Very cool.  What type of auto repair shops do you own?  Also, welcome to the forums.  What kind of 13 Dodge did you have?

 

On 7/3/2020 at 5:21 AM, Colossus said:

Very cool.  What type of auto repair shops do you own?  Also, welcome to the forums.  What kind of 13 Dodge did you have?

General repair and maintenance shops but we focus mostly on the repair business. I had a 1500 Big Horn with the 5.7 and 8 speed. It was a great truck overall. 

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On 7/3/2020 at 2:41 PM, Pinnacle said:

Good to see another one from the industry,  Have you seen camshaft scaring on the Hemis from 2009 to 2014?  TIPM was a big problem and still havent been changed out.  

Not 100% sure on the year range but we do see cam/rocker issues on the Hemi engines- usually because people don't maintain their vehicles properly. Full synthetic oil changes every 5k miles will prevent most internal engine problems for the useful life of a vehicle IMO. 

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