Vehicle recall 77V119000 · August 10, 1977
Chevrolet C30 and GMC C30
On the involved vehicles, the nuts which attach the brake master cylinder to the hydro-boost unit may have been over-tightened.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- On the involved vehicles, the nuts which attach the brake master cylinder to the hydro-boost unit may have been over-tightened. This could have caused stripped threads and cracked attaching flanges. Should these nuts fail, the parts may separate and loss of service brakes would result.
- Remedy
- Dealer will inspect for cracks in the attaching flanges; units with cracks present will be replaced. If no cracks are found, the studs will be removed and the holes drilled out. The unit will be reassembled using bolts and nuts in place of the existing studs.
- Notes
- Vehicle description: light trucks.system: service brakes; master cylinder to hydro-boost unit attaching nuts.consequences of defect: loss of braking capability could occur without priorwarning and could cause loss of vehicle control and an accident.
Recall details
- NHTSA campaign
- 77V119000
- Reported to NHTSA
- August 10, 1977
- Filed by
- GENERAL MOTORS CORP.
- Owner notification
- August 10, 1977
- Vehicles potentially affected
- 1,232
- Initiated by
- the manufacturer
- Components
- Service brakes, hydraulic › Power assist › Vacuum
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Chevrolet C30 (1977): 1977
- GMC C30 (1977): 1977
Has your Chevrolet 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 Chevrolet dealer can also check your VIN. Recall repairs are free.