GMC 1990 Light Truck Repair Manual page 16

0A-10 GENERAL INFORMATION
S/T PICKUP, REGULAR CAB
S/T CHASSIS CAB
s fr UTILITY VEHICLE
S/T PICKUP, EXTENDED CAB
JIMMY (BLAZER)
B6998
Figure 18—ST Models
Passenger Van
1. Grade 2 (GM 200-M)
2. Grade 5 (GM 280-M)
3. Grade 7 (GM 290-M)
Cargo Van
4. Grade 8 (GM 300-M)
5. Manufacturer's Identification
6. Nut Strength Identification
7. Identification Marks (Posidriv Screw Head)
F0695
Figure 19— M Models
Figure 20— Bolt and Nut Identification