Same issue for me.. 2020 Chevy Silverado 1500 RST.. (16K miles) Second time this has happened to me. Truck motor spins, but will not fire. First time I let it set 15 mins.. then it started (that was about 6 weeks ago) . I am in the waiting time now .. hopefully it will start in a few mins. - This is frustrating... After the first time I took it into the dealership & they checked it.. no problems could be found. Both times it was after I had started it & drove it .. (has not happened on a first start of the day or cold start). It is -5deg this morning in Michigan, but truck was outside & started fine with remote start this morning. I will start tracking this issue.