Am General Hummer: Brakes

Affects Am General Hummer · 1999 — about 8 vehicles.

The hazard

On certain vehicles, the nuts used to attach the master cylinder to the hydro-boost unit are of the metric type rather than the required English type. Although the English threaded bolts will accept the metric nuts, torque retention and clamping load of the nut-to-bolt joint is compromised. A loose master cylinder condition can occur, causing longer than normal brake pedal travel during brake pedal applications. Correction: Mounting bolts and nuts will be replaced with the correct compatible attachment hardware.

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational