2011–2014 Mack Pinnacle (chu), 2011–2014 Mack Pinnacle (cxu) Recall: Affected trucks are equipped with Fontaine Ultra LT Fifth Wheel…
NHTSA campaign 15V644000 · Trailer Hitches · filed Oct 13, 2015 · verified Jul 30, 2026
The defect
Mack Trucks, Inc. (Mack) is recalling certain model year 2011-2014 Pinnacle (CHU and CXU) trucks manufactured September 10, 2010, to June 17, 2013. The affected trucks are equipped with Fontaine Ultra LT Fifth Wheel connectors, which, due to cumulative damage to the fifth wheel and its locking mechanism, have a locking mechanism that may fail to operate or to properly engage.
The risk
If the fifth wheel and locking mechanism are sufficiently damaged, the locking mechanism may fail to operate as intended and the trailer may unexpectedly detach from the tractor, increasing the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Mack will notify owners, and Fontaine dealers will replace the fifth wheel with an Ultra NT model fifth wheel, free of charge. The recall began on November 18, 2015. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0395.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Affected vehicles
Related recalls
More Mack Pinnacle (chu) recalls
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- 2018–2022 Mack Anthem (an) and 5 other models — Vehicles may not stay in their lane at certain speeds
- 2020 Mack Anthem (an) and 2 other models — Castle nuts and cotter pins used to connect the steering…
- 2020 Mack Anthem (an) and 3 other models — Conspicuity reflectors at the back of the cab may be…
- 2018–2019 Mack Anthem (an) and 2 other models — Service Brakes, Air
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 15V644000 (manufacturer number SC0395). Data last verified Jul 30, 2026.