2012 Mack Granite (gu), 2011 Mack GU, 2011–2012 Mack Leu and 3 other models Recall: Service Brakes, Air
NHTSA campaign 11V272000 · Service Brakes, Air · filed May 3, 2011 · verified Jul 30, 2026
The defect
MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2011-2012 CHU, CXU, GU, LEU AND MRU TRUCKS MANUFACTURED FROM OCTOBER 15, 2010, THROUGH JANUARY 31, 2011, AND EQUIPPED WITH GUNITE AUTOMATIC SLACK ADJUSTERS. DUE TO AN INCOMPLETE "KNITTING" OF THE IRON AT THE TIME OF CASTING, INADEQUATE STRUCTURAL INTEGRITY OF THE SLACK ADJUSTER HOUSING CAN OCCUR, WHICH COULD CAUSE THE HOUSING TO BREAK AT THE HANDLE UNDER NORMAL OPERATING LOADS.
The risk
SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE 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 TRUCKS WILL NOTIFY OWNERS AND DEALERS WILL REPLACE THE SUBJECT SLACK ADJUSTERS FREE OF CHARGE. THE SAFETY RECALL BEGAN ON AUGUST 24, 2011. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-528-6586.
OWNERS MAY ALSO CONTACT THE NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION'S VEHICLE SAFETY HOTLINE AT 1-888-327-4236 (TTY 1-800-424-9153), OR GO TO <A HREF=HTTP://WWW.SAFERCAR.GOV>HTTP://WWW.SAFERCAR.GOV</A> .
Affected vehicles
Related recalls
More Mack Granite (gu) recalls
- 2010–2016 Mack Granite (gu) — Vehicles remedied under Recall 15V804 (SC0398) may have had…
- 2019–2025 Mack Granite (GR) and 1 other model — Tires may not have been DOT tested and confirmed to be…
- 2015–2023 Mack Granite (GR) and 1 other model — Turn signals may be positioned incorrectly, reducing their…
- 2020–2021 Mack Granite (gu) — Lower rear pivot cap screws may not be long enough to…
- 2021–2022 Mack Anthem (an) and 5 other models — Hubcap compression spring can cause the hubcap to separate
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 11V272000 (manufacturer number SC0352). Data last verified Jul 30, 2026.