Vehicle recall 77V181000 · October 17, 1977

Pontiac Grand AM, Pontiac Grand Lemans and 4 more models

The rear brake wheel cylinder retainer on the involved vehicles may not have been properly installed.

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

Summary: The rear brake wheel cylinder retainer on the involved vehicles may not have been properly installed. Should the wheel cylinder retainer become completely disengaged, the wheel cylinder could move outboard causing a loss of brake fluid and a loss of rear braking action.
Remedy: The dealer will reposition the rear wheel brake cylinder retainers, free of charge, on all affected vehicles.
Notes: Vehicle description: passenger vehicles.system: service brakes; rear wheel brake cylinder retainers.consequences of defect: loss of rear braking capability can occur withoutwarning and an accident could result.note: loss of braking action will be signalled to driver by the warning lighton the dash and by an increase in brake pedal travel and increased vehiclestopping distances.

Recall details

NHTSA campaign: 77V181000
Reported to NHTSA: October 17, 1977
Filed by: GENERAL MOTORS CORP.
Vehicles potentially affected: 636
Initiated by: the manufacturer
Components: Service brakes, hydraulic › Foundation components › Drum › Wheel cylinders

Recall 77V181000 on nhtsa.gov, with the manufacturer’s documents

Vehicles covered

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