Chevrolet Silverado / GMC Sierra. Manual - part 394
Fig. 21: Lower Rocker Arm Cover (Top View)
Courtesy of GENERAL MOTORS CORP.
Lower Rocker Arm Cover - Top View
Lower Rocker Arm Cover - 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 6 x
1.0
-201
-202
N/A
-203
-204
-205
18 0.709 15 0.591
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 22: Lower Rocker Arm Cover (Side View)
Courtesy of GENERAL MOTORS CORP.
Lower Rocker Arm Cover - Side View
Upper Rocker Arm Cover - 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
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 23: Upper Rocker Arm Cover (Top View)
Courtesy of GENERAL MOTORS CORP.
Upper Rocker Arm Cover - Top View
Upper Rocker Arm Cover - Bottom View
Fig. 24: Upper Rocker Arm Cover (Bottom View)
Courtesy of GENERAL MOTORS CORP.
Upper Rocker Arm Cover - Bottom 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 5 x
0.8
N/A
N/A
N/A
N/A
N/A
N.A
13 0.512 10 0.394
2
M 8 x
1.25
-206
-207
N/A
-208
-209
-210
21 0.827 17 0.669
3
M 6 x
1.0
-201
-202
N/A
-203
-204
-205
16 0.630 12 0.472
Service
Drill
Depth
Tap
Depth
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Flywheel Housing - Rear View
Fig. 25: Flywheel Housing (Rear View)
Courtesy of GENERAL MOTORS CORP.
Flywheel Housing - Rear View
Hole
Location
Thread
Size
Drill
Counterbore
Tool
Stop
Collar Tap Driver Insert
(Max)
(Min)
mm (in) mm (in)
1
M 5 x
0.8
N/A
N/A
N/A
N/A
N/A
N/A
13 0.512 10 0.394
Service
Hole
Thread
Counterbore Stop
Drill
Depth
(Max)
Tap
Depth
(Min)
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado