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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1439 (ENGINE MECHANICAL - 5.3L (LM4))SPECIFICATIONSTHREAD REPAIR SPECIFICATIONSENGINE BLOCK - BOTTOM VIEW
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Engine Block - Bottom View

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Engine Block - Bottom View
WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Block Bolt Holes - Bottom View
GM64655Courtesy of GENERAL MOTORS CORP.
Engine Block - Bottom View

Hole Thread Size Insert Drill Counterbore Tool Tap Driver Drill Depth - Maximum mm (in) Tap Depth - Maximum mm (in)
1 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
2 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
3 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
4 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
5 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
6 M16 x 1.5 - - - - - - -
7 N/A - - - - - - -
8 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
9 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
10-11 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
12 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
13-14 M10 x 1.5 J 42385-215 J 42385-101 - J 42385-213 J 42385-214 42.5 (1.67) 37.0 (1.45)
15 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
16 M16 x 1.5 - - - - - - -
17 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
18 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
19 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
20 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
21 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
22 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
23 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
24 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
25-26 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
27 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
28-29 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
30 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
31 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
32 M28 x 1.25 - - - - - - -
33 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
34 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 53.5 (2.10) 44.0 (1.73)
35 M10 x 2.0 J 42385-104 J 42385-101 - J 42385-102 J 42385-103 31.0 (1.22) 25.5 (1.0)
36 M8 x 1.25 J 42385-210 J 42385-206 J 42385-207 J 42385-208 J 42385-209 22.5 (0.885) 17.5 (0.688)
  • Bolt holes 2, 5, 10, 11, 18, 21, 24, 28, 29, and 34 have a 20.5 mm (0.807 in) counterbore included in the 53.5 mm (2.10 in) drill depth.
  • Bolt holes 1, 4, 9, 12, 17, 20, 23, 27, 30, and 35 have 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 holes 13 and 14 have a 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.
RENDER: 1.0x

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  • • You are missing required tools, torque specs, or safe lifting equipment.
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