Webat my store, you have seven days to come pick up your order. So i would just call and let them know your situation. Most of the time, nobody picks up from my store at the time. Webeverything starts with you placing an order online at walmart. com or in the app. According to a walmart. Webif you find yourself running late for walmart grocery pickup and your pickup window has passed, you still have until the end of pickup service to pick up your order,. Webif there's a delay in your scheduled delivery, you may get a text message or push notification inviting you to reschedule your delivery order or change to a pickup order. Webif you are late to your scheduled pickup, and the pickup window is prior to 8 p. m. , you can still check in by 8 p. m. Local time on the pickup date. If you are late to check in for your pickup order and it is after 8 p. m. , you should reschedule or cancel and reorder. Webif there's a delay in your scheduled delivery, you may get a text message or push notification inviting you to change your delivery order to a pickup order. The orders don’t normally get picked until a couple hours before pick up.