GMC 1989 Light Duty Truck Repair Manual page 364

6A1-8 2.5 LITER L4 ENGINE
37. W a sh er
38. B o lt
42. S tud
43. In ta ke M a n ifo ld
44. G a sket
2. B o lt
3. S tud
5. E xh a u st M a n ifo ld
7. G a ske t
Figure 6— Intake Manifold Components
Figure 7 — Exhaust M anifold C om ponents
F-01984
F-01985