GM issued a document to dealers this week indicating it had implemented the new extended warranty coverage on 2015, 2016, 2017 and 2018 model year C7 Corvette Z06 models. The document says these vehicles “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.”
The special coverage looks to address this issue and “covers the condition described above for a period of 7 years or 72,000 miles, which occurs first, from the date the vehicle was original placed in service, regardless of ownership.” The document also indicates that vehicle owners or lessees who paid for repairs referenced in this special coverage warranty are eligible for reimbursement.
To correct the overheating issue in affected vehicles, dealers are instructed to install an updated radiator package, along with updated shift point calibration software for automatic vehicles. These repairs will be made at no cost to the customer, although the customer must provide proof of the overheating problem in the way of a diagnostic code, photos or video.
The C7 Corvette Z06 overheating issues are well-known and widely publicized, as GM has already faced a number of class-action lawsuits over the problem. Chevy implemented some small changes on the 2017 model Corvette Z06 to help remedy the overheating issue, which included revised hood intake vents and a reworked cooling system, among more, but some owners still reported experiencing cooling issues with the vehicle.
The C7 Corvette Z06 is powered by a supercharged 6.2L LT4 V8 engine producing 650 horsepower and 650 pound-feet of torque, which is paired with a standard seven-speed manual or optional GM eight-speed automatic. These cooling issues have been experienced by owners of both automatic and manual transmission vehicles.