Problem Report & Question: 2015 Automatic Trans, HUD & DIC Failures

[Dan_C7]

Sorry my first C7 post is not a good one. I owned a C5, C6, and now a C7 for a few days.

Problem Report & Question: 2015 Automatic Trans, HUD & DIC Failures:

Has anyone with a 2015 experienced these failures at under 500 miles?

1. HUD and DIC speed reading locking at a lower speed for minutes?

Problem description:
12:30 13 Aug 2015, the speed reading locked at 40 mph and the speedometer indicated I was going 55 mph. The HUD and DIC system shut off after a few minutes Once it came back on, the HUD/DIC and speedometer was matching. It did not repeat and no speeding tickets.

2. 8 speed automatic start shifting into 2nd gear so hard the wheel would spin a little with sudden lurching forward as the gear catches?

Problem description:
16:00 13 Aug 2015, I was pulling out of an intersection and nearly lost control with the unexpected hard shifting while turning the vehicle. This was going only into second gear shifts while in car was in touring mode. This issue was repeating in all driving modes. OnStar vehicle check did not indicate any problems and they recommended taking the car in for checks if I could safely drive.

Action Notes:
To limp back to the dealership, I would let off the gas pedal while the transmission shifted and made it safely there. I got the salesman to witness the shifting issue.

Both system issues 1 and 2 are Safety defect issues which could result in catastrophic accidents. I though other owners need situational awareness and/or maybe provide advice.

In additional to the dealership working on this, I contacted Chevy Corp customer service and opened up a case to replace the car.

Nearly a decade ago, I also went through the 2006 C6 defect issue with my car top's glue coming apart on the highway nearly flying off the car. This is another not so good day. My 2003 C5 ran great for 12 years with no major defects so I still have hope for the C7 health to get better or getting a repalcement.

Its been 41 hours since dropping off and no reports back on the root causes from the dealership's Corvette specialist. It is like having a friend in the hospital.

Any questions, comments, or concerns would be appreciated.

Thanks!

[efarley]

From what I've read the transmission issues you're having can be fixed with an ECU update, although I thought all the newer ones already had this update done as this isn't a common problem. I hope they get this worked out before they build mine.

Good luck man, hopefully it's just a computer update.

[purpleRac3r]

With so many computers in our cars the ocassional glitch, as experienced by your HUD, is bound to happen at some point. A simple reset by turning off the car and restarting usually fixes them. Once in a while it takes disconnecting the battery to reset them. On very, very rare ocassions a reflash of the comluters is needed, and is easily done by the dealer under warranty.

The transmission also sounds like it may have a computer glitch in the shift program, and if so should be quickly fixed with a reflash under warranty.

I wouldn't get all upset about no repair with the dealer only having the car for 41 hours - that's less than 2 days, and the Corvette tech could be stuck on a prior job, or waiting for information from GM. To already have filed a case with Customer Care asking for a replacement car is to me a bit premature, considering you haven't given them a decent chance to diagnose and repair the issue. These are the kinds of things the warranty is for. Yes, I do understand your concerns, especially after the C6 top blowing off, but I think you would benefit by taking this a touch more patiently and letting the dealer do what they can first. No car is perfect - with thousands of parts and countless steps handled by hundreds of people, the typical car is quite a complex machine! A few hiccups do happen, and the warranties are thwre for them. Its when a problem is addressed repeatedly with no fix that it becomes an issues for further measures. Good kuck, and hope you get your car back on the road soon!