C 3500 Truck 2WD V8-379 6.2L DSL (1988)
Brake Rotor/Disc: Specifications
GM brake systems are identified by Regular Production Option (RPO) codes. For further information on RPO codes see Application and ID.
RPO JN1, JN3, JB3*
RPO JN5, JN6*
RPO JN7, JN8*
Nominal Thickness
1.00 in
1.25 in
1.26 in
Minimum Refinish Thickness
0.979 in
1.23 in
1.23 in
Discard Thickness
0.964 in
1.21 in
1.21 in
Thickness Variation (parallelism)
0.0005 in
0.0005 in
0.0005 in
Run Out (TIR)
0.004 in
0.004 in
0.004 in
