Cylinder Head - Exhaust Manifold Deck 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: Cylinder Head - Exhaust Manifold Deck 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	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
2	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
3	6 x 1	405	n/a	406	203	204	205	28	1.103	23	0.906
4	6 x 1	405	n/a	406	203	204	205	28	1.103	23	0.906
5	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
6	6 x 1	405	n/a	406	203	204	205	28	1.103	23	0.906
7	6 x 1	201	202	n/a	203	204	205	22	0.866	18	0.709
8	6 x 1	405	n/a	406	203	204	205	28	1.103	23	0.906
9	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
10	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
11	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
12	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
13	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
14	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
15	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
16	8 x 1.25	206	207	n/a	208	208	210	28	1.103	23	0.906
17	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
18	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906
19	8 x 1.25	206	207	n/a	208	209	210	28	1.103	23	0.906