GMC 1976 ZEO 6083 Maintenance Manual page 193

Figure 13-Removing Bellows Retaining Nut
2. Remove wheels .
3 . Disconnect leveling valve link at control arm .
Remove air from bellows by moving valve arm
down. Disconnect air line at the bellows as shown in
Figure 12 .
4. Remove bellows retaining nuts, located at ei-
ther end of air bellows, as shown in Figure 13 .
Figure 14-Disconnecting Brake Line
REAR SUSPENSION
4- 9
Figure 15-Disconnecting Parking Brake Cable
5 . Disconnect shock absorbers from control arm
mounting .
6 . Referring to Figure 14, disconnect brake line
at center mounting bracket and at each brake back-
ing plate . Remove brake lines from control arms by
unbolting all mounting points .
7 . Disconnect parking brake cable at "Y" con-
nection as shown in Figure 15 .
Figure 16-Outer Dust Cap Removal