Engine Block - Front View

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Block - Front 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	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
2	6 x 1	201	202	n/a	203	204	205	18	0.709	14	0.551
3	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
4	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
5	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
6	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
7	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
8	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
9	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
10	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
11	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
12	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
13	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
14	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
15	6 x 1	201	202	n/a	203	204	205	30	1.182	26	1.024
16	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
17	16 x 1.5	405	n/a	407	203	204	205	24	0.945	16	0.630
18	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024
19	8 x 1.25	206	207	n/a	208	209	210	30	1.182	25	0.985
20	8 x 1.25	206	207	n/a	208	209	210	30	1.182	25	0.985
21	6 x 1	405	n/a	407	203	204	205	30	1.182	26	1.024