Content .. 1867 1868 1869 1870 ..
Chevrolet Silverado / GMC Sierra. Manual - part 1869
Engine Block - Left/Right Side Views
Fig. 2: Engine Block - Left/Right Side Views
Courtesy of GENERAL MOTORS CORP.
Engine Block - Left/Right Side Views
Hole
Thread
Size
Insert
Drill
Counterbore
Tool
Tap
Driver
Drill
Depth -
Maximum
mm (in)
Tap Depth
-
Maximum
mm (in)
J 42385-
1
M8 x
1.25
210
206
207
208
209
22.5
(0.885)
17.5
(0.688)
2
M8 x
1.25
210
206
207
208
209
28.5
(1.122)
23.0
(0.905)
3
M8 x
1.25
210
206
207
208
209
21.5
(0.846)
16.0
(0.629)
4
M10 x
1.25
215
211
212
213
214
29.0
(1.141)
23.0
(0.905)
5
M10 x
1.5
215
211
212
213
214
27.0
(1.062)
21.5
(0.846)
6
M16 x
1.5
N/A
N/A
N/A
N/A
N/A
N/A
N/A
7
M11 x
2.0
108
105
N/A
106
107
69.0 (2.72) 60.0 (2.36)
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Engine Block - Top/Bottom Views
Fig. 3: Engine Block - Top/Bottom Views
Courtesy of GENERAL MOTORS CORP.
Engine Block - Top/Bottom Views
8
M28 x
1.25
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Bolt hole 7 has a 30 mm (1.18 in) counterbore included in the 69.0 mm (2.72 in) drill
depth. Use sleeve J 42385-315 with the drill and tap.
Hole
Thread
Size
Insert
Drill
Counterbore
Tool
Tap
Driver
Drill
Depth -
Maximum
mm (in)
Tap Depth
-
Maximum
mm (in)
J 42385-
1
M8 x
1.25
210
206
207
208
209
22.5
(0.885)
17.5
(0.688)
2
M10 x
1.5
215
211
212
213
214
42.5 (1.67) 37.0 (1.45)
3
M10 x
2.0
104
101
N/A
102
103
31.0 (1.22) 25.5 (1.0)
4
M10 x
104
101
N/A
102
103
53.5 (2.10) 44.0 (1.73)
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Cylinder Head - Top/End Views
Fig. 4: Cylinder Head - Top/End Views
Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Top/End Views
2.0
5
M8 x
1.25
210
206
207
208
209
26.5
(1.043)
19.0
(0.748)
Bolt hole 2 has an 11.5 mm (0.452 in) counterbore included in the 42.5 mm (1.67 in)
drill depth. Use sleeve J 42385-311 with the drill and tap.
Bolt hole 3 has a 1.5 mm (0.059 in) counterbore included in the 31.0 mm (1.22 in)
drill depth. Use sleeve J 42385-316 with the drill and tap.
Bolt hole 4 has a 20.5 mm (0.807 in) counterbore included in the 53.5 mm (2.10 in)
drill depth.
Hole
Thread
Size
Insert
Drill
Counterbore
Tool
Tap
Driver
Drill
Depth -
Maximum
mm (in)
Tap Depth
-
Maximum
mm (in)
J 42385-
1
M8 x
1.25
210
206
207
208
209
26.5 (1.04)
19.0
(0.784)
2
M6 x
1.0
205
201
202
203
204
20.05
(0.789)
16.05
(0.632)
3
M10 x
215
211
212
213
214
28.0 (1.10)
20.0
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Cylinder Head - Intake/Exhaust Side Views
Fig. 5: Cylinder Head - Intake/Exhaust Side Views
Courtesy of GENERAL MOTORS CORP.
Cylinder Head - Intake/Exhaust Side Views
1.5
(0.787)
4
M6 x
1.0
205
201
202
203
204
22.5
(0.885)
15.0
(0.688)
Hole
Thread
Size
Insert
Drill
Counterbore
Tool
Tap
Driver
Drill
Depth -
Maximum
mm (in)
Tap Depth
-
Maximum
mm (in)
J 42385-
1
M6 x
1.0
205
201
202
203
204
Thru
Thru
2
M10 x
1.5
215
211
212
213
214
28.0 (1.10)
20.0
(0.787)
2008 Chevrolet Silverado 1500
2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado
Content .. 1867 1868 1869 1870 ..