[Robin Lyn]

I had engine light come on last month. They said something about an EVAP issue. Now a month later engine light is on again! Not too happy. I have a 2020CT4

 

[Submariner409]

Welcome Aboard !!!

Take the car to a parts store and ask them to scan its built-in diagnostic code system. Use the below link to decipher and post any found codes here.

OBDII diagnostics. Trouble codes description for GM

OBDII/EOBD diagnostic code definition. More than 18000 codes for all autos. Trouble codes description for GM

obdii.pro

 

[hcnatureboy]

I had engine light come on last month. They said something about an EVAP issue. Now a month later engine light is on again! Not too happy. I have a 2020CT4

I had the exact same problem ONE DAY after vehicle purchase. I brought it to the service department, they replaced the faulty part (it was a sensor), and I have had no further problems. Good luck with your issue!