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About tystaples

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  1. I have the same issue, started yesterday on my 2020 Denali 1500 with the 6.2. I purchased the truck new the end of April and it currently has 4900 miles on it. Crank and crank with no start. I did eventually get it to stay running on the 5th or 6th go by pressing the pedal once it started to sound like there was some ignition taking place. CEL came on and I was sent an email from Onstar to get the truck serviced. I drove it another 120 miles with multiple starts and stops with no issues. I made the appointment and brought it in this morning and when the dealer tech was going to drive the truck in to the shop it wouldn't start for him so I had instant validation of the complaint. This is what was relayed to me by the service advisor after 2.5 hours: *This is a known emerging issue they're working on with these vehicles and other GM models though this is the first one my dealer has seen. *The tech had to do extensive electrical testing to send data back to GM engineers. *GM doesn't know exactly what the problem is but the current fix is to replace the ECM and fuel pump assembly. Suspected issue is somewhere in the circuit between the ECM and fuel sender electronics. *The good news is the the ECM is on the shelf. The bad news is the fuel pump is backordered so my brand new $70k truck can't be relied on to start when I need it to. I left it at the shop so it will sit in their way until they get it repaired which could be 5 weeks! I'm a former automotive engineer and manager for OEMs and tier 1 suppliers. I worked in electrical design, product improvement, quality and manufacturing. I currently own 4 auto repair shops as my 2nd career when I got tired of the stress and corporate politics. I'm telling you this because I have a pretty good insider view on how things work when problems happen. I will tell you with 100% certainty that people at GM, Ford, and Chrysler get VERY worked up when there is a problem with the trucks because they are the cash cow that drives sales for the entire brand. I'm sure this is getting a ton of attention to get a fix in place ASAP. I hope it happens soon because I'm pretty disappointed. I love my new truck and want to drive it... FWIW I traded in a 2018 Sierra 1500 SLT and had no issues in 60k miles. My 2013 Ram was basically problem free for 150k miles (only broken exhaust manifold bolts and dead stereo/touchscreen after 120k).
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