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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11If your Cadillac or Chevrolet EV will not charge, first check the vehicle’s charging status and indicator, then verify the charge schedule, connector, and station. A light or message can point toward delayed charging, a station problem, or a vehicle fault—but the correct meaning and fix depend on the model year. Use the owner’s manual for your exact vehicle, and treat persistent high-voltage warnings as a service issue rather than trying parts or resets.
Start with the charging light and vehicle status
Check the dashboard charging indicator and the vehicle display or app before changing settings or disconnecting equipment. Cadillac’s published indicator guidance distinguishes these states:
- Solid blue: connected, but charging has not started.
- Pulsing or flashing blue: charging is delayed or scheduled for later.
- Flashing green: charging is in progress.
- Solid green: charging is complete.
- Flashing red while connected: an error involving the vehicle or charging station.
A red theft-deterrent flash while the vehicle is disconnected is a different condition from a red charging error. Check the specific vehicle’s manual if the indicator pattern differs or is unclear. Cadillac’s charging-status indicator guide explains the published patterns.
Plugged in, but charging does not start
Check the schedule and charge settings
A connected vehicle may be waiting for its scheduled charge time. Review “Charge Later,” the home charging schedule, or the equivalent setting in your vehicle or app. If you want charging to begin immediately, select the appropriate immediate-charge setting for your model.
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Reconnect the cable and confirm the station is ready
- Put the vehicle in Park.
- Stop any active session, then disconnect and reconnect the coupler, seating it fully in the inlet.
- Complete the station’s activation or payment steps, including any steps required in its app.
- Check the vehicle and app status again to see whether charging has started or an error is shown.
On public charging, try another compatible stall if one is available. If the problem follows one stall or station, contact the charging network using the support details shown in its app or on the station; contacts can change. Cadillac’s public charging guidance also recommends checking the schedule, reconnecting, and contacting the network when the station may be at fault.
For a home charging fault on a 2018 Chevrolet Bolt EV
The 2018 Bolt EV owner’s manual says to check that the vehicle is set to Immediate charge and to check the breaker for a residential 240-volt charging station. It also describes comparing the result with the portable charging cord or a different 240-volt station. If another charger works, the original station or its circuit may be the problem. This is model-specific guidance for the 2018 Bolt EV, not a universal procedure for every Cadillac or Chevrolet EV. Consult the 2018 Bolt EV owner’s manual, or use the manual for your exact model and year.
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Red charging light or a high-voltage warning
A flashing red charging indicator while connected means the vehicle or station has reported an error; it does not identify the failed component by itself. If the display also shows “Unable to Charge” or a high-voltage warning, follow the instructions for that exact message in your owner’s manual.
Cadillac’s warning guidance includes limited reset steps for certain situations, but cautions that the vehicle may not restart after it is switched off, depending on the error. Park somewhere safe before following any such procedure. If the warning persists or the vehicle still cannot charge, arrange dealer support. If it cannot be put in Drive, have it towed to a dealer. Do not treat a reset as a repair for an unresolved high-voltage or battery-cooling fault. Cadillac’s dashboard warning-light guidance gives the relevant safety cautions; the exact instructions vary by vehicle.
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NACS adapter does not work
First confirm that the station is a supported public DC fast charger and that the adapter is approved for your vehicle and that station. GM service bulletin PIT6353, dated March 24, 2025, describes some NACS-adapter charging failures and says the GM NACS adapter is for public DC charging, not home charging or Level 1/Level 2 equipment. The bulletin states: “The GM NACS, Tesla adapter is only designed for public DC charger, not home use or level 1,2 chargers.”
An adapter does not guarantee that every NACS station will work: Cadillac notes that some stations may not be compatible with GM EVs or adapters. Check current station availability and requirements in the vehicle app and follow the current manufacturer instructions. Do not use the DC fast-charging adapter as an AC home-charging adapter. Read GM bulletin PIT6353 and Cadillac’s public charging guidance.
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Charging is slow or stops before the battery is full
A slower rate does not necessarily mean the car or charger has failed. Charging power can vary with battery temperature, station output, vehicle settings, and state of charge. Cadillac says charging slows as the battery fills, with a significant reduction around 80%; charging near full is also slower. A station may also change available power through dynamic power sharing.
For DC fast charging, Cadillac advises starting battery conditioning about 30 minutes before arrival. On vehicles with built-in Google Maps, navigating to a DC fast charger can start conditioning automatically. These behaviors are not proof of a fault on their own; check the vehicle’s charging display and manual for its features and settings. Cadillac’s public charging guidance describes charging rates and battery conditioning.
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Charge cable will not release
- Stop charging through the station, vehicle display, or mobile app.
- If the session has stopped but the cable remains locked, consult the owner’s manual for the secondary release procedure and its location.
Cadillac says the secondary release cord under the hood can release a locked cable after charging has stopped. The location and procedure are vehicle-specific, so do not pull or force a release mechanism based on instructions for another model. See Cadillac’s public charging instructions.
How to narrow down whether the vehicle or charger is at fault
When more than one explanation fits, compare where the failure follows. Change only one factor at a time where practical, and use equipment compatible with the vehicle.
| What to compare | What the result may indicate |
|---|---|
| Another compatible public stall | If the vehicle charges there, the original stall or network session may be at fault. If it fails at multiple compatible stations, check vehicle settings and alerts. |
| Another compatible home charger or circuit | If another charger works, the original station or its circuit may be involved. For a 2018 Bolt EV, follow that manual’s specific breaker and comparison checks. |
| AC Level 1/Level 2 versus public DC fast charging | A failure limited to one charging type can help isolate the equipment, adapter, or compatibility involved. A GM NACS DC adapter is not for AC home, Level 1, or Level 2 charging. |
| Immediate charging versus a scheduled session | If immediate charging works, a schedule or delayed-charge setting may explain why the vehicle initially appeared not to charge. |
| Vehicle alerts and indicator state | A routine delayed-charge status differs from a persistent red error or high-voltage warning, which calls for the vehicle’s warning-specific instructions and possibly dealer diagnosis. |
Compatibility depends on the vehicle’s model year, inlet, charging equipment, adapter, and station. For a Chevrolet or Cadillac manual, use the official owner-support materials for the exact vehicle rather than applying another model’s procedure. The Chevrolet manuals and guides include model-specific documents; Cadillac’s charging and warning pages are linked above.
When to contact a dealer—and when to check for recalls
Arrange Chevrolet or Cadillac dealer support if the vehicle continues to show a high-voltage or battery-cooling warning, cannot charge with equipment confirmed compatible for that vehicle, or remains unable to charge after basic setting and connection checks. If it cannot be put in Drive, have it towed rather than attempting to drive it.
A no-charge symptom alone does not establish that a recall applies. Recall eligibility is specific to the vehicle and campaign. Use your VIN to check for open recalls through NHTSA’s recall lookup; do not infer recall eligibility from a general charging problem.
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