Recall check: 151 Mack medium-duty electric trucks for a false hill-start assist message
NHTSA says an incorrectly enabled dashboard message can lead to unexpected rollback on an incline; dealers will update the software and the owner's manual free of charge.
Mack Trucks is recalling 151 of its 2024-2026 Medium-Duty Electric (MDe) trucks because they were built with the hill start assist message turned on when it should not have been.
According to the report Mack filed with the National Highway Traffic Safety Administration, a false hill start assist message can lead to unexpected rollback on an incline and raise the risk of a crash. NHTSA lists the campaign as 26V719000. Mack's number for the recall is SC0502.
The filing covers model years 2024, 2025 and 2026 and identifies the vehicles as Mack MD (Electric). It does not say owners must park the trucks or keep them outside, and it does not describe the remedy as an over-the-air update.
What dealers will do
Dealers will update the dashboard notification software and add a correction to the owner's manual, at no charge. Owner notification letters are expected to be mailed December 28, 2026.
Owners can contact Mack customer service at 1-800-866-1177 and refer to recall SC0502. The filing says vehicle identification numbers involved in the recall were to be searchable on NHTSA.gov beginning November 5, 2026.
NHTSA received the report on October 29, 2026. The agency's recall record lists the component as the owner's or service manual, matching the plan to correct the manual along with the dashboard software.
What fleets should do
The campaign is small, at 151 trucks, but it applies to a specific electric medium-duty model. A truck's model year alone does not prove it is included. Fleet managers should check each VIN in NHTSA's lookup and with a Mack dealer, then keep the repair order once the software update and manual correction are done.
Drivers who see an unexpected hill start assist message, or who notice rollback on an incline, should treat that as a reason to have the truck checked rather than waiting for the mailed letter.