GM Service Manual Online
For 1990-2009 cars only

3rd and 4th Clutch Backing Plate Selection Table

Dimension

Identification

5.88-5.68 mm (0.231-0.224 in)

A

4.99-4.76 mm (0.196-0.187 in)

B

4.10-3.90 mm (0.161-0.154 in)

C

Use a backing plate which gives the correct travel. The travel should be 2.10-0.90 mm (0.083-0.035 in).