Chevrolet Silverado / GMC Sierra. Service manual — part 389

Fig. 2: Cylinder Head (Exhaust View)
Courtesy of GENERAL MOTORS CORP.

Cylinder Head - Exhaust View

Cylinder Head - Intake View

Fig. 3: Cylinder Head (Intake 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

M 10 x

1.5

-211

-212

N/A

-213

-214

-215

25 0.985 21 0.827

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Cylinder Head - Intake View

Cylinder Head - Top View

Fig. 4: Cylinder Head (Top View)
Courtesy of GENERAL MOTORS CORP.

Cylinder Head - Top View

Service

Hole

Location

Thread

Size

Drill

Counterbore

Tool

Stop

Collar Tap Driver Insert

Drill

Depth
(Max)

Tap

Depth

(Min)

mm (in) mm (in)

1

M 8 x

1.25

-206

-207

N/A

-208

-209

-210

21 0.827 17 0.669

Service

Hole

Location

Thread

Size

Drill

Counterbore

Tool

Stop

Collar Tap Driver Insert

Drill

Depth
(Max)

Tap

Depth

(Min)

mm (in) mm (in)

1

M 6 x

1.0

-201

-202

N/A

-203

-204

-205

17 0.669 13 0.512

2

M 8 x

1.25

-206

-207

N/A

-208

-209

-210

26 1.024 20 0.788

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Cylinder Head - Rear View

Fig. 5: Cylinder Head (Rear View)
Courtesy of GENERAL MOTORS CORP.

Cylinder Head - Rear View

Cylinder Head - Front View

3

M 10 x

1.5

-211

-212

N/A

-213

-214

-215

26 1.024 20 0.788

Service

Hole

Location

Thread

Size

Drill

Counterbore

Tool

Stop

Collar Tap Driver Insert

Drill

Depth
(Max)

Tap

Depth

(Min)

mm (in) mm (in)

1

M 8 x

1.25

-206

-207

N/A

-208

-209

-210

17 0.669 13 0.512

2

M 10 x

1.5

-211

-212

N/A

-213

-214

-216

20 0.788 16 0.630

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado

Fig. 6: Cylinder Head (Front View)
Courtesy of GENERAL MOTORS CORP.

Cylinder Head - Front View

Intake Manifold - Right Side View

Service

Hole

Location

Thread

Size

Drill

Counterbore

Tool

Stop

Collar Tap Driver Insert

Drill

Depth
(Max)

Tap

Depth

(Min)

mm (in) mm (in)

1

M 8 x

1.25

-206

-207

N/A

-208

-209

-210

17 0.669 13 0.512

2

M 10 x

1.5

-211

-212

N/A

-213

-214

-216

20 0.788 16 0.630

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 6.6L - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado