The problem
The rear brake release time may be greater than the time specified in fmvss 121, "air brake system". In addition, some tractors may have warped parking brake apply springs which also effect the rear brake release time. Consequence of defect: tractors fail to meet the stopping distance specified in fmvss 121 which is required to stop the truck safely.
The fix
Install a quick release valve in the trailer service air line and increase the diameter of the rear service brake line. Also inspect rear spring brake chamber and release if necessary.
Contacts
System: air brakes. Vehicle description: tractors equipped with rpo rq3 tractor application.
What to do
- Check your VIN. Enter it at nhtsa.gov/recalls - it shows whether this recall applies to your vehicle and whether the repair has been done.
- Call a dealer. Any authorized Chevrolet dealer will do the repair free, whether or not you bought the vehicle there. Quote campaign 85V124000.
- Ask about parts and a loaner. If parts aren't available yet, ask what to do in the meantime.
- Keep your paperwork. If you paid for this repair before the recall, you may be able to get reimbursed - here's how.