GM Service Manual Online
For 1990-2009 cars only

Object Number: 277490  Size: MF
(1)Steering Gear Box Mounting Holes (Outboard Side of Left Front Frame Rail)
(2)Rear Frame Rail Extension
(3)Bumper Attachment Outer Stud
(4)Right Rear Frame Rail
(5)Right Rear Frame Rail
(5)Gage Hole
(6)Gage Hole
(7)Gage Hole Torque Box
(8)Front Jack mount Hole
(9)Rectangular Hole
(10)Rectangular Hole
(11)Gage Hole
(12)Steering Idler Arm Mounting Hole
(13)Rear Cradle Mounting Hole
(14)Front Cradle Mounting Hole
(15)Gage Hole
(16)Lower Radiator Support Gage Hole

Underbody Dimensions

Ref.

Usage

Length

Width

Height

Feature Size

1

Steering Gear Box Mounting Holes (Outboard Side of Left Front Frame Rail - FWD Top Hole

316

332

386

10 mm

1

Steering Gear Box Mounting Holes (Outboard Side of Left Front Frame Rail

Lower Hole

284

332

308

10 mm

1

Steering Gear Box Mounting Holes (Outboard Side of Left Front Frame Rail

RWD Hole

220

332

348

10 mm

2

Rear Frame Rail Extension

2790

394

286

12 mm

3

Bumper Attachment Outer Stud

3182

502

376

8 mm stud

4

Right Rear Frame Rail

3080

444

344

14 mm

5

Gage Hole

2446

124

386

25 mm

6

Gage Hole

1836

450

225

15 mm

7

Gage Hole Torque Box

1624

590

240

20 mm

8

Front Jack Mount Hole

1522

650

172

15 mm

9

Rectangular Hole

184

410

130

14 mm x 10 mm

10

Rectangular Hole

0

390

128

14 mm x 10 mm

11

Gage Hole

312

372

292

17 mm

12

Steering Idler Arm Mounting Hole - FWD Top Hole

240

332

386

10 mm

12

Steering Idler Arm Mounting Hole - RWD Lower Hole

276

332

308

10 mm

13

Rear Cradle Mounting Hole

396

368

294

13 mm

14

Front Cradle Mounting Hole

692

380

286

13 mm

15

Gage Hole

916

440

280

25 mm

16

Lower Radiator Support Gage Hole

1148

312

194

13 mm