Hey everyone:
I realize I have not posted very much on the forum, but I always enjoy reading the experiences and tales of other members. I guess I need the collective wisdom of all of you to help figure out what is going on.
I have a 2015 C7 auto with 59000 miles on it. As you can see, I love to drive it.
Since I have owned it, I have had three instances of overheating, each with the same scenario. After a fairly long drive at Corvette speeds, we encountered a massive traffic jam: twice getting in to New York City, once at the Canadian border in Windsor, Ontario. Each time, the temp gauge pegged at 260, the warnings came on, and I shut it down to cool off. In Canada, no problem, the car started normally after cooling down, and it did not recur. However, the two NYC breakdowns resulted in extended service at a dealer in Paramus, New Jersey.
Most recently, the car refused to start or crank after it cooled down and had to be towed.
It is, at present, at the dealer in Paramus NJ, where they have yet to tell me what was wrong with it, only to say it is fixed and running normally. Am I doing something incorrectly? Is this a common problem with 2015 cars? I have seen some threads on the forum that appear to address this issue, but cannot find anything definitive which may offer a solution so it does not happen again.
I love this car, as I have loved my previous three Corvettes (one C5, two C6s,) and I would hate to go to the expense and trouble of trading it in before it is paid off.

Any ideas???
Thanks!!

 

For overheat conditions that ONLY occur in stop-and go traffic conditions, I believe the most common root-cause reported in this forum has been an intermittent radiator fan motor.

A C7 that only overheats in stop-and-go traffic conditions can be caused by:
- Bad radiator fan motor
- Bad control module for the fan motor (located next to the fan motor)
- Bad 80A fuse for the fan motor (I think this is a bolt-in fuse (not a regular plug-in fuse)) located in the Aux Power Distribution/Fuse panel, which is located between the regular underhood fuse/relay panel and the coolant tank. It has a white plastic cover.
- Bad ground wire connection, or +12V feed wire connection, to the fan control module & fan motor.
- A bad PCM, which sends the fan speed control signal to the fan control module, or a bad wire connection of this signal to the fan control module. The PCM sends the fan speed control signal based on the engine coolant temp sensor, but if the sensor fails, the PCM commands the fan to full-speed, as a fail-safe strategy.

A bad thermostat, or low coolant level, or blocked radiator airflow (debris) will cause the car to overheat in all driving speed/conditions.