Vehicle recall 08V177000 · April 17, 2008
2009 Mack GU
The molded valve body has an incorrect core pin in the injection mold causing the valve body to be oversized in the double check valve area.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Mack is recalling 66 my 2009 gu trucks equipped with bendix MV-3 dash control valves. The molded valve body has an incorrect core pin in the injection mold causing the valve body to be oversized in the double check valve area. This condition can allow the rubber double check valve to become lodged in the body opening under certain circumstances.
- Consequence
- If the double check valve becomes lodged, in the event of a primary reservoir failure, air pressure can leak past the lodged double check valve thereby depleting the secondary reservoir, causing reduced ability for modulating the service emergency brakes increasing the risk of a crash.
- Remedy
- Dealers will inspect the MV-3 dash valve for the production date code. Valves in the affected production lots will be replaced free of charge. The recall began on may 9, 2008. Owners may contact mack trucks at 1-800-528-6586.
- Notes
- Mack trucks recall no. SC0339.CUSTOMERS 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 http://www.safercar.gov.
Recall details
- NHTSA campaign
- 08V177000
- Reported to NHTSA
- April 17, 2008
- Filed by
- MACK TRUCKS, INC
- Manufacturer campaign
- SC0339
- Owner notification
- May 9, 2008
- Vehicles potentially affected
- 66
- Initiated by
- the manufacturer
- Components
- Parking brake › Conventional › Air
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.