There’s a recent announcement from General Motors, saying that it will extend the warranty coverage of Corvette Z06s (2015 to 2018 model years). According to the automaker, the reason for this is that the C7 Z06s “may have a condition where the vehicle may overheat and enter a reduced power mode when driven on a track at sustained high speeds in high ambient temperatures.”
Since they rolled out in 2015, many C7 Corvette Z06 units have experienced overheating when they are on track. GM addressed this problem in 2017 by altering the design of the cooling system and hood intake vents. But this effort did not yield significant results.
The extended warranty will cover all 2015 to 2018 Z06s for 7years or 72,000 miles–whichever comes first. It will be inclusive, regardless of who’s the current owner of the Z06. Furthermore, customers who have already dealt with the repairs are qualified to receive refunds.
GM said the way to fix the cooling problem is by installing a newly-updated radiator package. It also encouraged the owners to update the shift point calibration of their car. Interestingly enough, GM will not charge the Z06 owners if they can show proof that an overheating problem did occur to their beloved vehicle (via video, images, or diagnostic codes).
It is not only an automatic transmission Z06s that suffered from this problem. Even the 7-speed manual transmission units have encountered overheating problems, too.
The overheating issues plaguing the C7 Corvette are not a secret. It has been a subject of different class-action lawsuits. Meanwhile, equipped with a supercharged 6.2-liter LT4 V8 engine that generates 650 horsepower and 650 lb-ft of torque; makes the C7 Z06 more powerful than a base C8 Corvette.