Late Model Suspension Chart

Courtesy of Hib Halverson, finspeed@aol.com

 

Model year Susp. RPO Front Spring Rate (N/mm) Rear Spring Rate (N/mm) Front Wheel Rate (N/mm) Rear Wheel Rate (N/mm) Front Antiroll bar dia (mm) Rear Antiroll bar dia (mm) Wheels (in * in * mm offset) Front Wheels (in * in * mm offset) Rear Front Tires Rear Tires Shocks Front Lower Bushings
1984
FE1 63.5 72.0 21.5 28.6 24 S 20 S 15x7x17 16x8.5x32 15x7x17 16x8.5x32 215/65R15 255/50VR16 215/65R15 255/50VR16 1 N
Z51 102.0 87.5 28.6 37.5 25 S 23 S 16x8.5x32 16x9.5x38 255/50VR16 255/50VR16 1/4 HD
1985
FE1 54.0 39.9 17.5 24.1 24 S 20 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1/3 N
Z51 63.5 57.2 26.0 30.6 30 S 24 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 1/4 HD
1986
FE1 51.8 39.9 18.0 24.1 26 T 20 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1/3 N
Z51 66.5 57.2 26.0 30.6 30 S 22 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 4 HD
FE1* 54.4 39.9 19.0 24.1 26 T 19 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 2/3 N
1987
FE1 51.8 39.9 18.0 24.1 26 T 20 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 1/3 N
Z52 51.8 39.9 18.0 24.1 30 S 20 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 3 N
Z51 66.5 57.2 26.0 30.6 30 S 22 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 4 HD
FE1* 54.4 39.9 19.0 24.1 26 T 19 S 16x8.5x32 16x8.5x32 255/50VR16 255/50VR16 2/3 N
Z52* 54.4 39.9 19.0 24.1 26 T 20 S 16x9.5x38 16x9.5x38 255/50VR16 255/50VR16 3 N
1988
FE1 93.1 39.9 26.7 25.7 26 T 22 S 16x8.5x50 16x8.5x50 255/50ZR16 255/50ZR16 1/3 N
Z52 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
Z51 115.5 57.2 30.8 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD
FE1* 93.1 39.9 26.7 25.7 26 T 22 S 16x8.5x50 16x8.5x50 255/50ZR16 255/50ZR16 2 N
Z52* 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
1989
FE1 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
Z51 115.5 57.2 30.8 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD
Chal. 115.5 57.2 30.8 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3* 93.1 39.9 26.7 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
1990
FE1 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
ZR1 96.2 39.9 27.1 25.7 26 T 24 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N
Z51 115.5 57.2 30.8 33.5 30 S 26 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 4 HD
R9G 115.5 57.2 30.8 33.5 30 S 26 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3* 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
1991
FE1 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
ZR1 96.2 39.9 27.1 25.7 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N
Z07 115.5 57.2 30.8 33.5 30 S 26 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3* 93.1 39.9 26.7 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
1992
FE1 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N
Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 3 N
FX3* 73.2 39.9 23.9 25.7 26 T 22 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 N
1993
FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 3 N
FX3 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 5 N
ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N
Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 3 N
FX3* 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17 285/40ZR17 5 N
1994
FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N
FX3 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N
ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N
Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N
FX3* 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N
1995
FE1 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 3 N
FX3 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N
ZR1 75.4 33.0 25.4 22.6 26 T 26 S 17x9.5x56 17x11x36 275/40ZR17 315/35ZR17 5 N
Z07 90.1 57.2 29.4 33.5 30 S 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 5 HD
FE1* 73.2 39.9 23.9 25.7 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 6 N
FX3* 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 5 N
1996
FE1 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 9 N
FE1/Z16 60.0 26.0 19.0 18.0 26 T 26 S 17x9.5x56 17x11x50 275/40ZR17 315/35ZR17 3 N
F45 60.0 26.0 19.0 18.0 26 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 7 N
F45/Z16 60.0 26.0 19.0 18.0 26 T 26 S 17x9.5x56 17x11x50 275/40ZR17 315/35ZR17 7 N
Z51 73.2 33.0 23.9 25.7 26 T 24 S 17x9.5x56 17x9.5x56 275/40ZR17 275/40ZR17 10 HD
Z51/Z16 73.2 33.0 23.9 25.7 26 T 26 S 17x9.5x56 17x11x50 275/40ZR17 315/35ZR17 10 HD
FE1* 73.2 39.9 23.9 25.7 24 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 6 N
F45* 73.2 39.9 23.9 25.7 24 T 24 S 17x8.5x56 17x9.5x56 255/45ZR17E 285/40ZR17E 8 N

   * Indicates the convertible body style.

CODES

S-Solid anti-roll bar
T-Tubular anti-roll bar
1-Delco shock
2-Delco shock, convertible specific
3-Delco/Bilstein gas shock
4-Delco/Bilstein gas shock, Z51 specific
5-Ride-adaptive Delco/Bilstein gas shock
6-Delco/Bilstein gas shock, convertible specific
7-Delphi bi-state ride adaptive gas shock
8-Delphi bi-state ride adaptive gas shock, convertible specific
9-Delco/Bilstein gas shock with valving revised for improved ride
10-Delco/Bilstein gas shock with valving revised for improved ride, Z51-specific

N-Normal, front, lower control arm bushings (ft. 11k n/mm, rr 2.3k n/mm)

HD-Heavy-duty, front, lower control arm bushings (ft 13.5k n/mm, rr 3.5k n/mm)

E-EMT tire available, Z16-Grand Sport

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