Front

Rotor Thickness:

Brake Systems:

GM brake systems are identified by Regular Production Option (RPO) codes. For further information on RPO codes see Application and ID at the overall vehicle level.

JB5 Power Brakes, Disc/Drum, 6400 LBS.
JB6 Power Brakes, Disc/Drum, 7200 LBS.
JB7 Power Brakes, Disc/Drum, 8400 LBS.
JB8 Power Brakes, Disc/Drum, 10,000 LBS.
JD5 Dual Power Brakes, Disc/Drum, 6400 LBS.
JD6 Hydraulic Power Brakes, Disc/Drum, 7200 LBS.
JD7 Hydraulic Power Brakes, Disc/Drum, 8400 LBS.
JF9 Hydraulic Power Brakes, 4 Wheel Discs