Hearth Record

Service brakes, hydraulic: foundation components: master cylinder (GMC and Chevrolet)

Vehicle recall 77V-111. NHTSA received GENERAL MOTORS CORP.’s report on Jul 15, 1977.

NHTSA’s own record, on nhtsa.gov

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The short answer

NHTSA received GENERAL MOTORS CORP.’s report on Jul 15, 1977. Copied from NHTSA on Oct 24, 2026.

Every line below is in NHTSA’s own words, with its source beside it.

What’s wrong with it?

The notice gives no hazard in a field of its own.

ON THE INVOLVED VEHICLES, THE BRAKE MASTER CYLINDER MAY HAVE BEEN ASSEMBLED WITH RESERVOIR MOUNTING BOLTS THAT WERE IMPROPERLY PROCESSED.

THIS COULD MAKE THESE BOLTS BRITTLE AND SUBJECT TO BREAKING.

IF BREAKAGE OCCURS, A BRAKE FLUID LEAK MAY DEVELOP BETWEEN THE RESERVOIR AND MASTER CYLINDER.

LOSS OF BRAKE FLUID WOULD ADVERSELY AFFECT VEHICLE BRAKING CAPABILITY.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

  • NHTSA’s part: Service brakes, hydraulic: foundation components: master cylinder.

What should you do?

DEALER WILL REPLACE THE MASTER CYLINDER RESERVOIR MOUNTING BOLTS WITH AN IMPROVED TYPE, WITHOUT CHARGE TO OWNER.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

  • How to reach the firm: VEHICLE DESCRIPTION: VANS AND MOTORHOMES EQUIPPED WITH HYDRO-BOOST ASSISTSYSTEMS.SYSTEM: SERVICE BRAKES; HYDRAULIC MASTER CYLINDER.CONSEQUENCES OF DEFECT: PARTIAL LOSS OF BRAKING CAPABILITY COULD OCCUR,RESULTING IN LOSS OF VEHICLE CONTROL AND AN ACCIDENT.
  • Check a vehicle by its VIN at NHTSA: the recalls still open on it are listed there.

Which ones are recalled?

NHTSA counts 12,963 vehicles potentially involved, across everything this recall names.

Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

  • GMC G30and 1976 and 1977, before the model years listed here
  • Chevrolet P30and 1976 and 1977, before the model years listed here
  • Chevrolet G30and 1976 and 1977, before the model years listed here

Who is recalling it?

  • Made by GENERAL MOTORS CORP..
Source:

NHTSA, Recalls flat file before 2010. Released Oct 24, 2026. Updated daily.

What the record doesn’t say

  • NHTSA’s recall file doesn’t say whether anyone was hurt.
  • Whether one vehicle or seat has been fixed: only its maker, or NHTSA’s lookup with a VIN, can say.
  • This recall names only model years before 2015, which have no pages here. Your VIN, at NHTSA, says which recalls are open on a vehicle.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

Source:

Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 24, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 28, 2026. Updated monthly.

From the homeNone yet. Replies and paid listings aren’t open, and when they open they will sit here, below the record.

1 of 4

Every fact names its source.

Who published it, when, and how often it changes sit beside each fact, with a link to the agency’s own file.

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