GMC · Canada · Crit
GMC Topkick 4500, Topkick 5500: Brakes
Affects GMC Topkick 4500, Topkick 5500 · 1996 — about 9 vehicles.
The hazard
On certain vehicles, a Parking brake solenoid valve malfunction may result in an intermittent inoperative park brake application. If this should occur and the "SERVICE PARK BRAKE" warning light goes unnoticed and the operator exits the vehicle, the vehicle could roll away, resulting in a possible crash. Correction: The parking brake solenoid valve will be replaced with a modified version.
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