GM Rearend Cover Bolt Patterns
| GM 10-BGM 10-Bolt (7.2″ ring gear)olt (7.2″ ring gear)  | GM 10-Bolt (7.5″ ring gear)  | GM 10-Bolt (8.2″ or 8.5″ ring rear)  |
| GM 10-Bolt (8.2″ or 8.5″ ring gear)  | GM 12-Bolt (8.875″ ring gear) Truck  | GM 12-Bolt (8.875″ ring gear) Car  |