Because the 2026 Sierra EV normally turns off when it detects the driver exiting in Park, use Keep Vehicle On After Driver Exit by setting Park and the parking brake and then pressing the timer control on the infotainment display.
Check that your vehicle has it.
Verified in the 2026 Sierra EV owner manual for the electric Elevation, AT4 and Denali model family with Hands-Free Start and driver-exit detection.
- Retail trim / version
- 2026 Sierra EV Elevation, 2026 Sierra EV AT4, 2026 Sierra EV Denali
Does the documented scope match your car?
This check combines the verified year, any source-supported powertrain scope, source-named trim/package and required equipment. It does not read a VIN or factory build record.
Published availability and qualifications
Verified in the 2026 Sierra EV owner manual for the electric Elevation, AT4 and Denali model family with Hands-Free Start and driver-exit detection.
Know what kind of control to look for.
This original category diagram is an orientation aid, not a picture of your exact trim. Use the written labels and your vehicle manual to identify the real control.
Step by step.
- 01
Stop on a suitable level area, press P and keep the brake applied until Park is confirmed.
- 02
Set the electric parking brake before preparing to leave the driver seat.
- 03
Press the Keep Vehicle On timer control on the infotainment display and note the time interval shown.
- 04
Keep the vehicle attended; press the timer control again if the manual-supported interval needs to be restarted.
- 05
Return before the timer expires, or listen for the horn chirp that indicates the truck has turned off.
Important limits
- The official manual says this timer should be used only while the vehicle is attended.
- Keeping the vehicle on consumes high-voltage battery energy; confirm adequate charge before activating it.
Quick checks.
- ✓If the truck turns off as the door opens, Park, parking-brake or timer activation was not completed before driver exit; restart and repeat in order.
- ✓If the timer control is unavailable, verify the truck is in Park with the parking brake set and no power-mode warning is active.
What happened on your vehicle?
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2026 GMC Sierra EV Owner's Manual — Keep Vehicle On After Driver Exit
Relevant section or page: 195-196. We use the written official source to determine the steps and applicability shown above.
Reviewed with a visible trail.
Scope and steps were checked by Car Cheat Codes Editorial Review. A guide is narrowed or corrected when the source does not support a broader claim.
- Published
- Last modified
- Source checked
Guide change history
- Initial verified publication.