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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2329 (ENGINE MECHANICAL - 4.6L (LH2) - SPECIFICATIONS)SPECIFICATIONSTHREAD REPAIR SPECIFICATIONS
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Thread Repair Specifications

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Thread Repair Specifications
WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Left Cylinder Head Camshaft Cover Face Thread Repair Locations
GM835986Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Camshaft Cover Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 608 N/A N/A 203 204 205 26.0 1.0236 22.0 0.8661
2 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
3 M20 x 1.5 715 716 N/A 717 718 719 32.0 1.2598 21.0 0.8268
4 M6 x 1.0 201 202 N/A 203 204 205 22.0 0.8661 18.0 0.7087
Fig 2: Left Cylinder Head Front Face
GM835989Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Front Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 27.0 1.0630 22.0 0.8661
2 M6 x 1.0 201 202 N/A 203 204 205 30.0 1.1811 26.0 1.0236
3 M8 x 1.25 610 N/A 619 208 209 620 27.0 1.0630 22.0 0.8661
4 M6 x 1.0 201 202 N/A 203 204 205 22.0 0.8661 18.0 0.7087
5 M10 x 1.5 211 212 N/A 213 214 215 32.0 1.2599 26.0 1.0236
Fig 3: Left Cylinder Head Intake Face
GM835991Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Intake Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 25.0 0.9843 21.25 0.8366
Fig 4: Left Cylinder Head Exhaust Face
GM835992Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Exhaust Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 215 32.0 1.2599 27.5 1.0827
2 M16 x 1.5 861 862 N/A 863 864 860 20.0 0.7874 16.0 0.6299
3 M10 x 1.5 211 212 N/A 213 214 215 32.0 1.2599 26.0 1.0236
4 M6 x 1.0 201 202 N/A 203 204 205 22.0 0.8661 18.0 0.7087
5 M8 x 1.25 206 207 N/A 208 209 210 25.0 0.9843 20.0 0.7874
Fig 5: Left Cylinder Head Rear Face
GM835993Courtesy of GENERAL MOTORS CORP.
Left Cylinder Head Rear Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M16 x 1.5 861 862 N/A 863 864 860 20.0 0.7874 16.0 0.6299
2 M8 x 1.25 206 207 N/A 208 209 210 27.0 1.0630 22.0 0.8661
Fig 6: Right Cylinder Head Camshaft Cover Face
GM835994Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Camshaft Cover Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 608 N/A N/A 203 204 205 26.0 1.0240 22.0 0.8660
2 M6 x 1.0 201 202 N/A 203 204 205 22.0 0.8660 18.0 0.7090
3 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
4 M20 x 1.5 715 716 N/A 717 718 719 32.0 1.2598 21.0 0.8268
Fig 7: Right Cylinder Head Front Face
GM835995Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Front Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 30.0 1.1811 26.0 1.0236
2 M6 x 1.0 201 202 N/A 203 204 205 22.0 0.8661 18.0 0.7087
3 M8 x 1.25 206 207 N/A 208 209 210 27.0 1.0630 22.0 0.8661
4 M8 x 1.25 610 N/A 619 208 209 620 27.0 1.0630 22.0 0.8661
Fig 8: Right Cylinder Head Intake Face
GM835996Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Intake Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 25.0 0.9843 21.25 0.8366
Fig 9: Right Cylinder Head Exhaust Face
GM835998Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Exhaust Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 215 32.0 1.2599 27.5 1.0827
2 M16 x 1.5 861 862 N/A 863 864 860 20.0 0.7874 16.0 0.6299
3 M8 x 1.25 206 207 N/A 208 209 210 25.0 0.9843 20.0 0.7874
Fig 10: Right Cylinder Head Rear Face
GM836000Courtesy of GENERAL MOTORS CORP.
Right Cylinder Head Rear Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M16 x 1.5 861 862 N/A 863 864 860 20.0 0.7874 16.0 0.6299
2 M8 x 1.25 206 207 N/A 208 209 210 27.0 1.0630 22.0 0.8661
3 M10 x 1.5 211 212 N/A 213 214 215 32.0 1.2598 26.0 1.0240
4 3/8 - 18
NPSF		 2013 N/A N/A 2014 2015 2016 THRU THRU
Fig 11: Engine Block Front
GM836001Courtesy of GENERAL MOTORS CORP.
Engine Block Front

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 19.5 0.7677 15.5 0.6102
2 M8 x 1.25 206 207 N/A 208 209 210 27.0 1.0630 22.0 0.8661
3 M6 x 1.0 201 202 N/A 203 204 205 23.0 0.9055 19.0 0.7480
4 M6 x 1.0 201 202 N/A 203 204 205 THRU 17.0 0.6693
5 M6 x 1.0 201 202 N/A 203 204 205 24.0 0.9449 17.0 0.6693
6 M6 x 1.0 201 202 N/A 203 204 205 THRU 15.5 0.6102
7 M8 x 1.25 206 207 N/A 208 209 210 THRU THRU
8 M10 x 1.5 211 212 N/A 213 214 420 30.0 1.1811 24.0 0.9449
9 M10 x 1.5 211 212 N/A 213 214 420 THRU THRU
10 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
11 M6 x 1.0 201 202 N/A 203 204 205 20.25 0.7972 16.25 0.6398
12 M6 x 1.0 201 202 N/A 203 204 205 23.75 0.9350 19.75 0.7776
13 M8 x 1.75 2001 2002 N/A 2003 2004 2005 26.75 1.0532 21.75 0.8563
Fig 12: Engine Block Left Side
GM836002Courtesy of GENERAL MOTORS CORP.
Engine Block Left Side

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 30.0 1.1811 24.0 0.0827
2 M6 x 1.0 201 202 N/A 203 204 205 25.0 0.9843 21.0 0.8268
3 M8 x 1.25 610 N/A N/A 208 209 620 30.0 1.1811 25.0 0.9843
4 M8 x 1.25 206 207 N/A 208 209 210 20.0 0.7874 16.0 0.6299
Fig 13: Engine Block Right Side
GM836007Courtesy of GENERAL MOTORS CORP.
Engine Block Right Side

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 30.0 1.1811 24.0 1.0827
2 M8 x 1.25 206 207 N/A 208 209 210 24.5 0.9646 15.0 0.5906
Fig 14: Engine Block Rear
GM836009Courtesy of GENERAL MOTORS CORP.
Engine Block Rear

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 THRU THRU
2 M8 x 1.25 206 207 N/A 208 209 210 THRU THRU
3 M10 x 1.5 211 212 N/A 213 214 420 39.75 1.5650 33.75 1.0827
4 M10 x 1.5 211 212 N/A 213 214 420 THRU THRU
5 M10 x 1.5 211 212 N/A 213 214 420 39.0 1.5354 33.0 1.2992
Fig 15: Engine Block Top
GM836012Courtesy of GENERAL MOTORS CORP.
Engine Block Top

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 20.0 0.7874 16.0 0.6299
2 M8 x 1.25 206 207 N/A 208 209 210 23.5 0.9252 18.5 0.7283
3 M8 x 1.25 206 207 N/A 208 209 210 23.0 0.9055 19.0 0.7480
4 M6 x 1.0 201 202 N/A 203 204 205 23.0 0.9055 19.0 0.7480
Fig 16: Engine Block Left Deck Face
GM836015Courtesy of GENERAL MOTORS CORP.
Engine Block Left Deck Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 608 N/A N/A 203 204 205 30.0 1.1811 25.0 0.9843
2 M11 x 2.0 2031 N/A 2034 2032 2033 108 73.0 2.8740 67.0 2.6378
3 M11 x 2.0 2031 N/A N/A 2032 2033 108 89.5 3.5236 83.5 3.2874
Fig 17: Engine Block Right Deck Face
GM836017Courtesy of GENERAL MOTORS CORP.
Engine Block Right Deck Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M11 x 2.0 2031 N/A 2034 2032 2033 108 73.0 2.8740 67.0 2.6378
2 M6 x 1.0 608 N/A N/A 203 204 205 30.0 1.1811 25.0 0.9843
3 M11 x 2.0 2031 N/A N/A 2032 2033 108 89.5 3.5236 83.5 3.2874
Fig 18: Engine Block Lower Face
GM836018Courtesy of GENERAL MOTORS CORP.
Engine Block Lower Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 511 N/A N/A 512 513 514 32.0 1.2598 26.5 1.0433
2 M8 x 1.25 610 N/A N/A 208 209 620 THRU THRU
3 M8 x 1.25 610 N/A N/A 208 209 620 37.0 1.4567 32.0 1.2598
Fig 19: Lower Crankcase Pan Face
GM836020Courtesy of GENERAL MOTORS CORP.
Lower Crankcase Pan Face

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M8 x 1.25 206 207 N/A 208 209 210 25.0 0.9843 20.0 0.7874
2 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
3 M6 x 1.0 201 202 N/A 203 204 205 22.0 0.8661 18.0 0.7087
Fig 20: Engine Front Cover
GM1410508Courtesy of GENERAL MOTORS CORP.
Engine Front Cover

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 22.5 0.8858 18.5 0.7283
2 M6 x 1.0 201 202 N/A 203 204 205 THRU 18.5 0.7283
3 M18 x 1.5 N/A N/A N/A N/A N/A N/A 11.7 0.4606 9.0 0.3543
4 M8 x 1.25 206 207 N/A 208 209 210 26.0 1.0236 21.5 0.8465
5 M8 x 1.25 206 207 N/A 208 209 210 THRU 18.5 0.7283
Fig 21: Camshaft Position Actuator Housing
GM1254571Courtesy of GENERAL MOTORS CORP.
Camshaft Position Actuator Housing

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M6 x 1.0 201 202 N/A 203 204 205 THRU THRU
2 M6 x 1.0 201 202 N/A 203 204 205 18.0 0.7087 14.0 0.5512
3 M10 x 1.5 N/A N/A N/A N/A N/A N/A THRU THRU
Fig 22: Camshaft Covers
GM1254577Courtesy of GENERAL MOTORS CORP.
Camshaft Covers

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 - - - - - - - THRU THRU
2 M6 x 1.0 201 202 N/A 203 204 205 23.0 0.9055 19.0 0.7480
#1 Threads are created initially when coil ground strap bolt is installed.
Fig 23: Oil Pan - Left
GM1254593Courtesy of GENERAL MOTORS CORP.
Oil Pan - Left

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 215 33.5 1.3189 27.0 1.0630
2 M12 x 1.75 856 857 N/A 858 859 865 THRU THRU
Fig 24: Oil Pan - Right
GM1254598Courtesy of GENERAL MOTORS CORP.
Oil Pan - Right

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M12 x 1.75 856 857 N/A 858 859 855 39.5 1.5551 32.0 1.2598
Fig 25: Oil Pan - Rear
GM1254602Courtesy of GENERAL MOTORS CORP.
Oil Pan - Rear

Hole Location Thread Size Drill Counter Bore Tool Stop Collar Tap Driver Insert Drill Depth (Maximum) Tap Depth (Minimum)
- - J 42385- MM (IN) MM (IN)
1 M10 x 1.5 211 212 N/A 213 214 420 THRU 21.5 0.8465
RENDER: 1.0x

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