Mack Granite (Gu), Mack Gu, Mack Leu, Mack Mru, Mack Pinnacle (Chu), Mack Pinnacle (Cxu), model years 2011 to 2012. Filed by Mack Trucks, Inc and reported to NHTSA on 3 May 2011. 1,524 vehicles potentially affected.
What the notice says 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 …
Is your vehicle included? Check with your VIN at NHTSA, or ask a dealer. This page is an independent copy of the notice, kept so you can see what changed after it was published. It is not the authority, and the authority’s own text is the one to act on.
The maker's own number for this recall: SC0352. That is the number on the owner letter and on the dealer paperwork. 11V272 is the number NHTSA gave the same campaign, and the number this page is filed under. They are one recall, written two ways.
What owners ask about this recall
- Which vehicles does recall 11V272 cover?
- Mack Granite (Gu), Mack Gu, Mack Leu, Mack Mru, Mack Pinnacle (Chu), Mack Pinnacle (Cxu), model years 2011-2012.
- What is wrong with them?
- 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.
- What can happen if it is not put right?
- SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE CRASH.
- Is there a fix yet?
- Yes, and it is free. 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.
- What should I do now?
- Check your own vehicle by its VIN with NHTSA, which is the record to act on. The maker calls this recall SC0352, which is the number on the owner letter and the dealer paperwork.
Answered from the register this site holds. NHTSA is the record to act on.
What the authority says can happen if this is not fixed: “SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE CRASH.”
affected
in the notice
caught
| Campaign | 11V272 |
|---|---|
| Filed by | MACK TRUCKS, INC |
| System at fault | Service Brakes, Air:Slack Adjusters:Automatic |
| Reported to NHTSA | 3 May 2011 |
| Model years | 2011-2012 |
| Vehicles named | MACK GRANITE (GU), MACK GU, MACK LEU, MACK MRU, MACK PINNACLE (CHU), MACK PINNACLE (CXU) |
What the notice says today
The consequence
SLACK ADJUSTERS WITH THIS FLOW NOTCH COULD CRACK UNDER NORMAL BRAKING CONDITIONS CAUSING LOSS OF BRAKING WHICH COULD RESULT IN A VEHICLE CRASH.
The remedy
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.
What it said before
This campaign is in the register but not yet in the dated wording archive, so we cannot yet say whether its text has moved. It enters the archive on the next pass.
This is one of 353 notices in the record whose component field names service brakes, air. Across that group the median wait before owners were written to was 43 days.
Last checked . No change has been recorded in the wording.
The models named here, across their whole recall history
- Mack Granite (Gu) recalls: 29 US campaigns
- Mack Gu recalls: 5 US campaigns
- Mack Leu recalls: 13 US campaigns
- Mack Mru recalls: 15 US campaigns
- Mack Pinnacle (Chu) recalls: 20 US campaigns
- Mack Pinnacle (Cxu) recalls: 41 US campaigns
How to cite this record
Quoting the wording on this page means quoting a version, so the date belongs in the citation:
CarsMultiverse, recall 11V272, wording as read on 17 September 2026. https://carsmultiverse.com/recall/11v272/
The cross-border matches used on this site are deposited as a citable dataset: doi:10.5281/zenodo.22087136. The recall wording itself is published by the national authority named above and is theirs, not ours.
The recall record and its wording are published by the US National Highway Traffic Safety Administration and are US Government public domain. The dated archive, the comparison and any before-and-after above are CarsMultiverse. How fresh every engine behind this page is, is public on the status page. To check a specific vehicle, use NHTSA’s own VIN lookup.
The fingerprint of this notice
We take a SHA-256 of each of the three blocks of text the authority publishes and keep the first eight characters. As we last read campaign 11V272 on 17 September 2026, they were:
- Defect summary
d7516753 - Consequence
4a400ad0 - Remedy
f7cee188
We first read this notice on 21 August 2026. It has not moved since. If it ever does, these characters will not match, and the change will be dated here.
The wording we hold for 11V272 · how the whole register is watched
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