GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine Block - Front View
Table 2: Engine Block - Back View
Table 3: Engine Block - Right Side View
Table 4: Engine Block - Bottom View
Table 5: Engine Block - Left Side View
Table 6: Engine Block - Top View
Table 7: Lower Crankcase - Front View
Table 8: Lower Crankcase - Back View
Table 9: Lower Crankcase - Bottom View
Table 10: Lower Crankcase - Right View
Table 11: Lower Crankcase - Left View
Table 12: Cylinder Head - Top View
Table 13: Cylinder Head - Intake Manifold Deck View
Table 14: Cylinder Head - Exhaust Manifold Deck View
Table 15: Cylinder Head - Front View
Table 16: Cylinder Head - Back View

Engine Block - Front View


Object Number: 1492382  Size: MF

Engine Block - Front View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

23.5

0.93

18.5

0.73

2

M12 x 1.75

855

856

857

858

859

33.5

1.32

26.5

1.04

3

M10 x 1.5

215

211

212

213

214

24.5

0.96

19.5

0.77

4

M6 x 1

205

201

202

203

204

20

0.787

16

0.63

Engine Block - Back View


Object Number: 1845224  Size: MF

Engine Block - Back View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

24

0.945

THRU

2

M10 x 1.5

215

211

212

213

214

29

1.161

THRU

3

M12 x 1.75

855

856

857

858

859

39

1.535

33.5

1.32

4

M16 x 1.5

860

861

862

863

864

21

0.827

15

0.59

Engine Block - Right Side View


Object Number: 1845229  Size: MF

Engine Block - Right Side View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M6 x 1

205

201

202

203

204

22.5

0.886

16

0.63

2

M10 x 1.5

215

211

212

213

214

34

1.339

27

1.063

3

M12 x 1.75

865

856

857

858

859

19.5

0.768

12.5

0.49

Engine Block - Bottom View


Object Number: 1492385  Size: MF

Engine Block - Bottom View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

28

1.102

22

0.87

2

M10 x 1.5

514

511

N/A

512

513

60

2.362

53.5

2.11

Engine Block - Left Side View


Object Number: 1845230  Size: MF

Engine Block - Left Side View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M6 x 1

205

201

202

203

204

20.5

0.807

16.5

0.65

2

M10 x 1.5

215

211

212

213

214

23.5

0.925

18

0.71

3

M8 x 1.25

210

206

207

208

209

30.5

1.201

22.5

0.89

4

M12 x 1.75

865

856

857

858

859

15.5

0.61

12.5

0.49

5

M12 x 1.75

865

856

857

858

859

19.5

0.778

12.5

0.49

Engine Block - Top View


Object Number: 1492387  Size: MF

Engine Block - Top View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

23.5

0.925

18.5

0.73

2

M11 x 1.5

507

504

N/A

505

506

77.5

3.053

70

2.758

3

M12 x 1.75

865

856

857

858

859

13.5

0.531

12.5

0.49

Lower Crankcase - Front View


Object Number: 1492389  Size: SF

Lower Crankcase - Front View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

23.5

0.925

18.5

0.73

2

M8 x 1.25

210

206

207

208

209

30.5

1.201

25.5

1.00

Lower Crankcase - Back View


Object Number: 1492390  Size: SF

Lower Crankcase - Back View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M10 x 1.5

215

211

212

213

214

29.5

1.161

THRU

Lower Crankcase - Bottom View


Object Number: 1492391  Size: MF

Lower Crankcase - Bottom View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

23.5

0.925

18.5

0.73

Lower Crankcase - Right View


Object Number: 1845231  Size: SF

Lower Crankcase - Right View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M10 x 1.5

215

211

212

213

214

34

1.339

27

1.063

Lower Crankcase - Left View


Object Number: 1845233  Size: SF

Lower Crankcase - Left View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

211

212

213

214

34

1.339

27

1.063

Cylinder Head - Top View


Object Number: 1825024  Size: MF

Cylinder Head - Top View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M6 x 1

205

852

N/A

203

204

23

0.906

19

0.748

2

M6 x 1

205

201

202

203

204

20

0.787

16

0.63

3

M14 x 1.75

856

857

N/A

858

859

THRU

THRU

4

M8 x 1.25

854

853

N/A

208

209

30

1.182

27

1.063

Cylinder Head - Intake Manifold Deck View


Object Number: 1825026  Size: SF

Cylinder Head - Intake Manifold Deck View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M6 x 1

205

201

202

203

204

20

0.787

16

0.63

2

M8 x 1.25

210

206

207

208

209

20

0.787

16

0.63

3

M8 x 1.25

205

201

202

203

204

16

0.630

12

0.473

Cylinder Head - Exhaust Manifold Deck View


Object Number: 1825027  Size: SF

Cylinder Head - Exhaust Manifold Deck View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M6 x 1

205

201

202

203

204

20

0.78

16

0.63

2

M8 x 1.25

210

206

207

208

209

25

0.984

20

0.78

Cylinder Head - Front View


Object Number: 1845236  Size: SF

Cylinder Head - Front View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M6 x 1

205

201

202

203

204

20

0.787

16

0.63

2

M8 x 1.25

210

206

207

208

209

25

0.984

20

0.787

Cylinder Head - Back View


Object Number: 1825030  Size: SF

Cylinder Head - Back View

Service Call Out

Thread Size

Insert

Drill

Counterbore Tool

Tap

Driver

Drill Depth

Maximum

Tap Depth

Maximum

J 42385-850

MM

IN

MM

IN

1

M8 x 1.25

210

206

207

208

209

25

0.984

20

0.787

2

M12 x 1.75

865

856

857

858

859

18

0.709

14

0.551

3

M6 x 1

205

201

202

203

204

20

0.787

16

0.63