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Network/ United States/ Mack/ 26V139000

Mack · United States · Mod

Mack Terrapro (Te): Engine and engine cooling — software

Affects Mack Terrapro (Te) · 2022–2027 — about 775 vehicles.

The hazard

Starting the vehicle while in gear may cause unexpected vehicle movement, increasing the risk of a crash or injury.

What to do

Dealers will update the ECU software, free of charge. Owner notification letters were mailed April 14, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0492. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov March 18, 2026.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational