- Vehicles
- 320,677
- Built between
- Aug 1978 – Jun 1979
- Models
- 7
- Recall type
- Vehicle
- Initiated by
- Manufacturer
- Owners notified
- 9 January 1981
- Repaired
- Not reported
- Unrepaired
- Not reported
Does this affect my vehicle?
This recall covers vehicles built between August 1978 and June 1979. If yours was built outside that window, it is not part of this recall.
- 1979-1980 Chevrolet C20Built August 1978 to June 1979
- 1979-1980 Chevrolet C30Built August 1978 to June 1979
- 1979-1980 Chevrolet K20Built August 1978 to June 1979
- 1979-1980 Chevrolet K30Built August 1978 to June 1979
- 1979-1980 GMC C20Built August 1978 to June 1979
- 1979-1980 GMC K20Built August 1978 to June 1979
- 1979-1980 GMC K30Built August 1978 to June 1979
What the defect is
Fatigue cracks may develop in the brake vacuum booster housing. This may cause a vacuum leak and reduce the effectiveness of the brakes. After prolonged use, the cracks may develop to the extent that the booster may separate from the vehicle.
What gets fixed
VEHICLES WILL BE INSPECTED FOR FATIGUE CRACKS IN THE BRAKE VACUUM BOOSTER. THOSE WITHOUT CRACKS WILL HAVE A SUPPORT BRACE INSTALLED. THOSE WITH EVIDENCE OF CRACKING WILL HAVE A NEW BRAKE VACUUM BOOSTER AND SUPPORT BRACE INSTALLED. THIS SERVICE WILL BE PROVIDED AT NO CHARGE.
Timeline
- Vehicles builtAugust 1978 to June 1979
- Recall reported to NHTSA13 January 1981
- Owners notified9 January 1981
Your rights
A safety recall repair is free. Under US federal law the manufacturer must fix a safety defect at no cost to you — no charge for parts, labor or diagnosis — whether or not you are the original owner. A dealer cannot charge you for recall work, and cannot require you to have bought the vehicle from them.
That entitlement is not unlimited. It applies where the vehicle was first sold less than 15 years before the recall was announced — 5 years for tires. Past that a manufacturer may still do the repair free of charge, and many do, but they are no longer obliged to. This recall was reported on 13 January 1981.
To arrange the repair, contact any franchised dealer for the brand. If a dealer refuses the work or tries to charge for it, you can report that to NHTSA at nhtsa.gov/recalls or on 1-888-327-4236.
Official source
- Recalling manufacturer
- GENERAL MOTORS CORP.
- Recall initiated by
- MFR
Everything on this page — the models listed, the build dates and the repair figures — comes from the manufacturer's filing to NHTSA and describes the vehicle line as a whole, not any individual car. Only the manufacturer can confirm whether a specific vehicle is affected, and whether its recall work has already been carried out. Check yours by VIN and read the official notice at nhtsa.gov/recalls.
Additional notes
Vehicle description: light trucks equipped with vacuum power disc/drum brakes.system: service brakes; vacuum brake booster housing.consequences of defect: separation will result in a loss of braking abilitywithout prior warning and may lead to an accident. Partial loss of brakingability may also lead to an accident, particularly in situations where minimumstopping distance is required.
Check your own vehicle
This page describes the recall, not any one car. To see which recalls cover a specific vehicle, search by make, model and year.
A VIN lookup here identifies your vehicle and shows recalls issued for that make, model and year. It cannot tell you what is still open on your individual car - only the manufacturer knows that. Search by VIN instead, or check your VIN at nhtsa.gov for whether a recall is still open on your individual car.