GMC 1989 Light Duty Truck Repair Manual page 495

V8 ENGINE 6A5-5
C y lin d e r w a lls are o ile d by o il th ro w n
o ff p re ssure fed c o n n e c tin g rod bearings.
CYLINDER WALL AND
CAMSHAFT LOBE OILING
OIL FILTER AND
FUEL PUMP PUSH
DISTRIBUTOR OILING
ROD OILING
CRANKCASE AND CRANKSHAFT OILING
VALVE MECHANISM OILING
B-09187
Figure 3 — Lubrication D iagram (7 .4 L Engines)