GMC T Series 1994 Repair Manual page 526

O IL PUMP REMOVAL
Remove or Disconnect (Figure 27)
1. Bolt (35).
2. Oil pump (33).
A. ALIGN MARKS AS SHOWN
84. SPROCKET, CRANKSHAFT
85. CHAIN, TIMING
86. BOLT, CAMSHAFT
87. WASHER, CAMSHAFT
88. GEAR, CAMSHAFT
89. SPROCKET, CAMSHAFT
Figure 26— Camshaft and Components
91. PLATE, THRUST
92. KEY, CAMSHAFT SPROCKET
93. SPACER, CAMSHAFT SPROCKET
PISTON AND CO NNECTING
ROD REMOVAL
Remove or Disconnect (Figures 28 and 29)
1. Ridge or deposits from the upper end of the cylin­
der bores.
A. Turn the crankshaft until the piston is at BDC.
B. Place a cloth on top of the piston.
B8068