NHTSA Recall 15V644000: Fifth wheel assembly (trailer hitches)
Mack Trucks, Inc. reported this safety recall to NHTSA on , covering an estimated 448 vehicles. It affects 2 models including the Mack Pinnacle (chu).
| NHTSA campaign | 15V644000 |
|---|---|
| Manufacturer campaign | SC0395 |
| Component | TRAILER HITCHES › FIFTH WHEEL ASSEMBLY |
| Report received | October 13, 2015 |
| Owner notification | November 18, 2015 |
| Initiated by | NHTSA Office of Defects Investigation |
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.
Safety 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.
Remedy
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.
Notes
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.
Vehicles covered by recall 15V644000
| Make and model | Model years |
|---|---|
| Mack Pinnacle (chu) | 2011, 2012, 2013, 2014 |
| Mack Pinnacle (cxu) | 2011, 2012, 2013, 2014 |
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.