Vehicle recall 74V227000 · November 21, 1974

Mack DM, R and 2 more models

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

Notes: Mack campaign no 55.MFG'D JAN.1, 1973 thru AUG.14, 1974.POSSIBILITYTHAT vehicles equipped with a tractor protection valve an interference couldoccur between the stop lamp switch and the head lamp switch could create ashort circuit that would interrupt head lamp operation.(correct by inspectingand providing additional clearance between switches where necessary).

Recall details

NHTSA campaign: 74V227000
Reported to NHTSA: November 21, 1974
Filed by: MACK TRUCKS, INCORPORATED
Owner notification: February 7, 1975
Vehicles potentially affected: 1,023
Initiated by: the manufacturer
Components: Exterior lighting › Headlights › Switch

Recall 74V227000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.

Mack DM (1973-1974): 1974, 1973
Mack R (1973-1974): 1974, 1973
Mack RD (1973-1974): 1974, 1973
Mack U (1973-1974): 1974, 1973

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.

Check your VIN with NHTSA

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.