GM Service Manual Online
For 1990-2009 cars only

Three Dimensional Distance -- X, Y, Z

This universal measuring system is capable of simultaneously dimensioning the length, width, and height of a datum plane. Three dimensional distances are used for both underbody and upperbody measuring.

X = Fore and aft measurements along the center line of the vehicle. An O plane is located forward of the master gage hole at the front of the vehicle XXXX mm as shown. All measurements are made from this plane toward the rear of the vehicle.

Y = Cross car dimensions. Positive values are measured from the center of the vehicle to the right side of the vehicle. Negative values are measured from the center ot the vehicle to the left side. When values are not listed separately to change the side of the vehicle, you need only to change the Y dimensions to the opposite value, + or -, from what is listed.

Z = Vertical measurement from the datum plane that is XXX mm below the rocker panel lower flange edge (O plane).

All Dimensions are symmetrical, unless otherwise noted.

In order to properly repair the spaceframe, restore the vehicle to the XYZ dimensions, as originally built. Relational (linear) dimensions are for reference only. Use relational dimensions for diagnosis or inspection only. Relational dimensions are not as accurate as XYZ dimensions and measuring systems.

The gage holes shown are the actual fixture locations that are used to build the vehicle.

Master Gage Holes


Object Number: 886687  Size: MF

Front Compartment


Object Number: 898079  Size: MF

Location

Description

Length = x

Width = y

Height = z

Point to Point

1

Fender Mount

1819

- 680

796

x

2

Strut Tower

1717

- 562

801

x

3

Fender Mount

1622

- 678

770

x

4

Fender Mount

1456

- 674

742

x

5

Tie Bar Locator Hole

1285

- 670

703

x

6

Headlamp Pocket and Fastener Hole

1208.2

- 655.6

696

x

7

Headlamp Mount Hole

1060

- 651

494

x

8

Impact Beam Fastener Access Hole

851

- 436

381

x

9

Impact Beam Fastener Access Hole

851

- 436

469

x

10

Hole

833

- 352

466

x

11

Hole

800

- 85

465

x

12

Grille Attach Center Hole

866

0

657

x

13

Hole

800

85

465

x

14

Impact Beam Fastener Access Hole

851

436

381

x

15

Hole

833

352

466

x

16

Impact Beam Fastener Access Hole

851

436

469

x

17

Vent Hole

1080

632

425

x

18

Headlamp Mount Hole

1060

651

494

x

19

 

977

320

657

x

20

Headlamp Pocket and Fastener Hole

1208.2

655.6

696

x

21

Tie Bar Locator Hole

1285

670

703

x

22

Fender Mount

1456

673

741

x

23

Fender Mount

1622

678

770

x

25

Fender Mount

1819

680

796

x

26

Engine Mount Fastener Hole

866.2

0

657

x

2 to 20

x

x

x

x

1324

2 to 22

x

x

x

x

1207

2 to 23

x

x

x

x

1123

9 to 23

x

x

x

x

1324

21 to 23

x

x

x

x

1207

All dimensions are measured from a zero line, a center line, and a common datum. All dimensions are symmetrical unless otherwise specified.

Sedan Rear


Object Number: 886698  Size: MF

Location

Description

Length = x

Width = y

Height = z

Point to Point

1

Rear Header Hole -- Left

4176

- 383

1290

x

2

Rear Header Hole -- Right

4176

383

1290

x

3

Seat Belt Bolt Hole

4177

663

1044

x

4

Hole

4177

- 663

1044

x

5

Hole

4697

205

951

x

6

Fascia Push Pin Hole

5356

138

601

x

7

Rear Compartment Striker Bolt

5285

31

498

x

8

Rear Compartment Striker Bolt

5285

- 31

498

x

9

Fascia Push Pin Hole

5255

- 137

601

x

10

Weld Stud

5260

460

445

x

11

Weld Stud

5260

570

445

x

12

Weld Stud

5260

515

328

x

13 (2002 Only)

Lamp Pocket Mount Hole

5149

678

847

x

13 (2003 Only)

Lamp Pocket Mount Hole

5165

616

854

x

14 (2002 Only)

Lamp Pocket Mount Hole

5155

709

769

x

14 (2003 Only)

Lamp Pocket Mount Hole

5148

677.5

768

x

15

Lamp Pocket Mount Hole

5075

722

833

x

16

Fascia Bracket Weld Stud

5025

761

547

x

17

Fascia Bracket Weld Stud

4750

805

533

x

18

Check Link Bolt Lower

3321

766

564

x

19

Check Link Bolt Upper

3321

765

596

x

From 1 to 4

x

x

x

x

1202

From 24 to 20

x

x

x

x

1202

From 2 to 22

x

x

x

x

922

From 1 to 20

x

x

x

x

1461

From 5 to 24

x

x

x

x

1461

From 5 to 10

x

x

x

x

3253

From 20 to 15

x

x

x

x

3253

From 5 to 15

x

x

x

x

2242

From 20 to 10

x

x

x

x

2242

From 6 to 19

x

x

x

x

866

From 14 to 12

x

x

x

x

1093

From 9 to 16

x

x

x

x

1237

From 15 to 11

x

x

x

x

955

From 10 to 14

x

x

x

x

955

From 9 to 14

x

x

x

x

1455

From 16 to 11

x

x

x

x

1455

From 20 to 5

x

x

x

x

689

All dimensions are measured from a zero line, a center line, and a common datum. All dimensions are symmetrical unless otherwise specified.

Wagon Rear


Object Number: 886702  Size: MF

Location

Description

Length = x

Width = y

Height = z

Point to Point

1

Lift Gate Hinge Mount

4926

-  354

1287

x

2

Lift Gate Hinge Mount

4926

354

1287

x

5

Weld Stud

5260

570

445

x

6

Weld Stud

5260

515

328

x

11

Weld Stud

5260

570

445

x

12

Weld Stud

5260

-  570

445

x

13

Weld Stud

5260

-  515

328

x

14

Lamp Pocket Mount Hole

5163

725

816

x

15

Lamp Pocket Mount Hole

5172

736

675

x

16

Fascia Bracket Weld Stud

5056

757

521

x

17

Fascia Bracket Weld Stud

4781

800

507

x

18

Fastener

4999

540

1214

x

From 1 to 2

x

x

x

x

707

From 12 to 6

x

x

x

x

1095

From 13 to 5

x

x

x

x

1095

From 12 to 5

x

x

x

x

1145

From 17 to 16

x

x

x

x

280

From 14 to 5

x

x

x

x

1351

From 15 to 5

x

x

x

x

1331

All dimensions are measured from a zero line, a center line, and a common datum. All dimensions are symmetrical unless otherwise specified.

Wagon Side


Object Number: 886934  Size: MF

Location

Description

Length = x

Width = y

Height = z

Point to Point

1

Retractor Bolt Anchor Hole

3252

717

362

x

2

Drain Hole

2850

373

1283

x

3

Drain Hole

2850

- 373

1283

x

4

Drain Hole

3069

527

1282

x

5

Drain Hole

4926

354

1287

x

6

Fascia Bracket Weld Stud

5056

757

521

x

7

Fascia Bracket Weld Stud

4781

800

507

x

8

Rear Striker Bolt Upper

4198

771

749

x

9

Rear Striker Bolt Lower

4183

772

710

x

10

Pillar Trim Attach Hole

3411

589

1275

x

11

Rocker Cover Push Pin Hole

3281

757

634

x

12

Front Striker Bolt Upper

3277

760

592

x

13

Front Striker Bolt Lower

3318

788

337

x

14

Door Harness Routing Hole

3252

794

362

x

15

Drain Hole

3200

796

281

x

16

Rocker Cover Push Pin Hole

2313

755

795

x

17

I/P Beam Fastener Access Hole (Upper)

2309

759

732

x

18

I/P Beam Fastener Access Hole (Lower)

2300

793

275

x

From 10 to 19

x

x

x

x

1510

From 10 to 11

x

x

x

x

1122

From 2 to 3

x

x

x

x

747

From 10 to 17

x

x

x

x

1209

From 17 to 15

x

x

x

x

1018

From 10 to 6

x

x

x

x

1818

All dimensions are measured from a zero line, a center line, and a common datum. All dimensions are symmetrical unless otherwise specified.

Sedan Side


Object Number: 886931  Size: MF

Location

Description

Length = x

Width = y

Height = z

Point to Point

1

Retractor Bolt Anchor Hole

3252

717

362

x

2

Drain Hole

2850

373

1283

x

3

Drain Hole

2850

- 373

1283

x

4

Drain Hole

3069

527

1282

x

6

Fascia Bracket Weld Stud

5025

761

547

x

7

Fascia Bracket Weld Stud

4750

805

533

x

8

Fascia Bracket Weld Stud

4198

771

749

x

9

Rear Striker Bolt Upper

4183

772

710

x

10

Rear Striker Bolt Lower

3411

589

1275

x

11

Pillar Trim Attach Hole

3281

757

634

x

12

Rocker Cover Push Pin Hole

3277

760

592

x

13

Front Striker Bolt Upper

3318

788

337

x

14

Front Striker Bolt Lower

3252

794

362

x

15

Door Harness Routing Hole

3200

796

281

x

16

Drain Hole

2313

755

795

x

17

Rocker Cover Push Pin Hole

2309

759

732

x

18

I/P Beam Fastener Access Hole (Upper)

2300

793

275

x

All dimensions are measured from a zero line, a center line, and a common datum. All dimensions are symmetrical unless otherwise specified.

Underbody


Object Number: 886631  Size: MF

Location

Description

Length = x

Width = y

Height = z

Point to Point

1

Hole

1727

- 464

335

x

2

Cradle Mount

1727

464

335

x

3

Strut Tower

1717

562

801

x

4

Drain Hole

1954

437

290

x

5

Cradle Mount

2830

- 433

137

x

6

Drain Hole

2830

433

137

x

7

Drain Hole

3435

462

141

x

8

Brace Bolt

3620

630

246

x

9

Drain Hole

3826

623

223

x

10

Rear Suspension Support Bolt

4218

493

362

x

11

Rear Suspension Support Bolt

4448

435

362

x

12

Drain Hole

5007

501

355

x

13

Tow Loop Hole

5007

- 501

355

x

14

Rear Suspension Support Bolt

4448

- 435

362

x

15

Rear Suspension Support Bolt

4218

- 493

362

x

16

Drain Hole

3826

- 623

223

x

17

Brace Bolt

3620

- 630

246

x

18

Drain Hole

3435

- 462

141

x

19

Drain Hole

2830

- 433

137

x

20

Cradle Mount

1143

523

260

x

21

Drain Hole

1954

- 437

290

x

22

Cradle Mount

1727

- 464

335

x

23

Strut Tower

1717

- 562

801

x

24

Hole

966

492

382

x

All dimensions are measured from a zero line, a center line, and a common datum. All dimensions are symmetrical unless otherwise specified.

Clearance and Flushness Specifications -- Wagon


Object Number: 894112  Size: MF

Location

Clearance Gap

Clearance Gap

Flushness

1

Roof Panel to Lift Gate

6.5-9.5 mm (0.25-0.38 in)

0.0-2.0 mm (0.0-0.08 in)

2

Lift Gate Quarter Panel

6.5-9.5 mm (0.25-0.38 in)

-1.0 to 1.0 mm (-0.04 to 0.04 in

3

Fuel Filter Door to Quarter

6.0-10.0 mm (0.25-0.40 in)

0.0-2.0 mm (0.0-0.08 in)

4

Tail Lamp to Lift Gate

6.0-10.0 mm (0.25-0.40 in)

0.0-2.0 mm (0.0-0.08 in)

5

Lift Gate to Fascia

5.0-12.0 mm (0.2-0.5 in)

--

6

Centerline Lift Gate to Fascia

5.0-12.0 mm (0.2-0.5 in)

--

7

Tail Lamp to Rear Quarter

1.0-4.0 mm 0.04-0.16 in

2.0-4.0 mm (0.08-0.16 in)

8

Roof Side Center Applique to Rear Quarter

2.0 mm (0.08 in)

--

Clearance and Flushness Specifications -- Sedan


Object Number: 894115  Size: MF

Location

Clearance

Clearance Gap

Flushness

1

Front Fascia to Hood

5.0-7.0 mm (0.24-0.32 in)

--

2

Front Fascia to Fender

1.0-3.0 mm (0.04-0.12 in)

--

3

Front Fender to Hood

3.0-5.0 mm (0.12-0.20 in

--

4

Front Fender to Door

5.0-7.0 mm (0.24-0.32 in)

1.5-0.0 mm (0.06-0.0 in)

5

Front Door to Rocker

5.0-7.0 mm (0.24-0.32 in)

1.5-0.0 mm (0.06-0.0 in)

6

Front Door Panel to Rear Door Panel

5.5-7.5 mm (0.22-0.30 in)

1.5-0.0 mm (0.06-0.0 in)

7

Windshield to Roof

5.0-11.0 mm (0.20-0.44 in)

--

8

Front Door to Rocker

5.0-7.0 mm (0.24-0.32 in)

1.5-0.0 mm (0.06-0.0 in)

9

Rear Door Panel to Quarter

5.5-7.5 mm (0.22-0.30 in)

--

10

Fuel Filler Door to Quarter

3.0-5.0 mm (0.12-0.20 in

1.5-0.0 mm (0.06-0.0 in)

11

Quarter to Rear Fascia

1.0-3.0 mm (0.04-0.12 in)

--

12

Decklid to Quarter

5.0-11.0 mm (0.20-0.44 in)

--

13

Decklid to Fascia

5.0-7.0 mm (0.24-0.32 in)

--

14

Front Door to Rear Door

5.0-7.0 mm (0.24-0.32 in)

--

15

Roof to Rear Door

--

--

16

Roof to Rear Window

No gap permissible

--