Owners of 2020 to 2022 model year Chevy Equinox and GMC Terrain vehicles may notice an unpleasant odor emanating from the vehicle’s climate control system. This typically occurs shortly after the engine has been switched off and then switched back on via the automatic start/stop system, although it may also be noticed at any time while the car is in operation if the passengers have a particularly sensitive nose.
This problem, GM says, can be traced back to the calibration of the electronic climate control module, which allows the evaporator temperature to drop below zero degrees Celsius or 32 degrees Fahrenheit. In this case, the air may have an odor as the evaporator is warming up during the engine stop process. To address the problem, GM has developed a calibration update for the electronic climate control module that prevents the evaporator temperature from dipping below freezing.
This problem is being addressed under a Service Bulletin, so customers that experience this problem will have to take their car into their dealership to have the repairs completed. Technicians will be instructed to perform the electronic climate control module update. These repairs will be performed under warranty for eligible customers/vehicles.
The 2022 Chevy Equinox and 2022 GMC Terrain, which ride on the same GM D2 platform, are only available with the turbocharged 1.5L I4 LYX gasoline engine, rated at 170 horsepower at 5,600 rpm and 203 pound-feet of torque at 2,000 rpm. The crossovers are produced exclusively at the GM San Luis Potosí plant in Mexico. While GM previously produced the Equinox at its CAMI plant in Canada, that facility is currently being retooled to build the new BrightDrop electric delivery vans.