Why won't my EV charging session start? / Chevy Bolt owner (or renter) stuck on 'Unable to charge' or 'initiating' at DC fast chargers

Chevy Bolt owner (or renter) stuck on 'Unable to charge' or 'initiating' at DC fast chargers

What people actually reported
Stuck on initiating; open HPCM2 calibration update found
“Mine does the same on a 2020, stuck on "initiating" until it times out. I pulled my calibration IDs with an OBD dongle and ran the VIN on the AC Delco TDS site. The HPCM2 shows out of date, and the Chevy warranty site lists an open HPCM2 calibration update.”
@tbrennick
Cut out mid-session, then stopped charging everywhere
“Mine would cut out partway through sessions, sometimes after 15 to 30 minutes, on Blink and ChargePoint DC, and eventually it stopped charging everywhere.”
@paul_arnett
Quit after 10 s; Error 57 persisted after replug
“One stall said "Initializing," started charging, then quit about 10 seconds later with no error at all. Another threw "Error 57: Communication Error" and it stayed after I unplugged, waited, and replugged.”
@ron_pascoe
Needs 2-3 tries at public chargers; "Unable to Charge"
“I usually need two or three tries at public chargers. Scan the QR, plug in, wait on the handshake, get "Unable to Charge," unplug and retry, and it normally starts the second or third time.”
@lmorrow_
2 of 4 attempts never completed; others needed a support call
“Four attempts, two never completed, and the other two only worked after I downloaded the network's app and called the number on the charger.”
@dmoreau_19