Chevrolet Silverado / GMC Sierra. Manual - part 389
Fig. 2: Cylinder Head (Exhaust View)
Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Exhaust View
Cylinder Head - Intake View
Fig. 3: Cylinder Head (Intake View)
Courtesy of GENERAL MOTORS CORP.
Service
Hole
Location
Thread
Size
Drill
Counterbore
Tool
Stop
Collar Tap Driver Insert
Drill
Depth
(Max)
Tap
Depth
(Min)
mm (in) mm (in)
1
M 10 x
1.5
-211
-212
N/A
-213
-214
-215
25 0.985 21 0.827
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Cylinder Head - Intake View
Cylinder Head - Top View
Fig. 4: Cylinder Head (Top View)
Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Top View
Service
Hole
Location
Thread
Size
Drill
Counterbore
Tool
Stop
Collar Tap Driver Insert
Drill
Depth
(Max)
Tap
Depth
(Min)
mm (in) mm (in)
1
M 8 x
1.25
-206
-207
N/A
-208
-209
-210
21 0.827 17 0.669
Service
Hole
Location
Thread
Size
Drill
Counterbore
Tool
Stop
Collar Tap Driver Insert
Drill
Depth
(Max)
Tap
Depth
(Min)
mm (in) mm (in)
1
M 6 x
1.0
-201
-202
N/A
-203
-204
-205
17 0.669 13 0.512
2
M 8 x
1.25
-206
-207
N/A
-208
-209
-210
26 1.024 20 0.788
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Cylinder Head - Rear View
Fig. 5: Cylinder Head (Rear View)
Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Rear View
Cylinder Head - Front View
3
M 10 x
1.5
-211
-212
N/A
-213
-214
-215
26 1.024 20 0.788
Service
Hole
Location
Thread
Size
Drill
Counterbore
Tool
Stop
Collar Tap Driver Insert
Drill
Depth
(Max)
Tap
Depth
(Min)
mm (in) mm (in)
1
M 8 x
1.25
-206
-207
N/A
-208
-209
-210
17 0.669 13 0.512
2
M 10 x
1.5
-211
-212
N/A
-213
-214
-216
20 0.788 16 0.630
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 6: Cylinder Head (Front View)
Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Front View
Intake Manifold - Right Side View
Service
Hole
Location
Thread
Size
Drill
Counterbore
Tool
Stop
Collar Tap Driver Insert
Drill
Depth
(Max)
Tap
Depth
(Min)
mm (in) mm (in)
1
M 8 x
1.25
-206
-207
N/A
-208
-209
-210
17 0.669 13 0.512
2
M 10 x
1.5
-211
-212
N/A
-213
-214
-216
20 0.788 16 0.630
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado