Vehicle recall 89V121000 · July 24, 1989

GMC Brigadier and General

The rear axle relay valves (one per axle) may not meet brake release timing requirements of FMVSS 121.

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

Summary: The rear axle relay valves (one per axle) may not meet brake release timing requirements of FMVSS 121.
Consequence: The rear axle brakes may not release in the timesspecified by FMVSS 121.
Remedy: Replace the noncomplying relay valves.
Notes: System:rear axle air brake relay valves/FMVSS 121.VEHICLE description:heavy duty trucks.

Recall details

NHTSA campaign: 89V121000
Reported to NHTSA: July 24, 1989
Filed by: GENERAL MOTORS CORP.
Vehicles potentially affected: 7
Initiated by: the manufacturer
Components: Service brakes, air › Controls, pedals and linkages

Recall 89V121000 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.

GMC Brigadier (1988): 1988
GMC General (1988): 1988

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