Frame and Underbody Chevrolet Chevy Express H1500

Fastener Tightening Specifications

Fastener Tightening Specifications

Tram Gauge Method

1. Use a tram gauge as a quick reference in order to determine vehicle damage. Use a tram gauge set with a vertical pointer capable of reaching 914 mm (36 in).
2. Make the engine compartment component measurements from point to point with the vertical pointers equally set.
3. Make the other measurements on the horizontal plane, or the datum line, parallel to the underbody with the vertical pointers set as specified for each point.
4. Measure dimensions that are measured to the gauge holes to the center of the holes and flush to the adjacent surface metal unless otherwise specified. Cross-check the diagonal dimensions in order to verify the dimensional accuracy of the vehicle underbody.

3-Dimensional Method

1. Measure following multiple points when measuring structural repair with repair equipment: The length The height The width
2. Measure 2/3 of the vehicle body in order to obtain accurate comparisons to the vehicle structure.
3. Univeral measuring systems combine the equipment and the techniques used to make the underbody 3-dimensional measurements. The universal system provides accurate measurements of the following points: The length The width The height

Removal Procedure

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/hoistjack/#general-information) .
2. Remove the tie down bracket to the frame mounting bolts, left side only.
3. Remove the tie down bracket from the frame.

Installation Procedure

1. Install the tie down bracket to the frame.
2. Install the tie down bracket to the frame mounting bolts. Tighten: Tighten the bolts to 30 N.m (22 lb ft).
3. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/hoistjack/#general-information) .
2. Remove the engine protection shield mounting bolts, light duty shown, heavy duty similar.
3. Remove the engine protection shield.

1. Install the engine protection shield.
2. Install the engine protection shield mounting bolts, light duty shown, heavy duty similar. Tighten: Tighten the bolts to 20 N.m (15 lb ft).
3. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/hoistjack/#general-information) .
2. Support lower control arms with safety stands.
3. Unload the torsion bars. Refer to «Torsion Bar and Support Assembly Replacement»(/chevrolet/chevy-express-h1500/2003-2012/remont/suspension-front/#front-suspension-system) .
4. Remove the right side differential carrier lower mounting bracket bolt and nut.
5. Remove the left side differential carrier lower mounting bracket bolt.
6. Remove the engine crossmember bolt from the left lower control arm bracket.
7. Remove the engine crossmember lower mounting bolts and nuts.
8. Remove the engine crossmember upper mounting bolts.
9. Disconnect the electrical wiring harness connectors from the engine crossmember.
10. Remove the lower control arm nuts and washers.
11. Remove the lower control arm bolts until bolts are flush with the frame.
12. Remove the engine crossmember.

1. Install the engine crossmember.
2. Install the lower control arm bolts to the through the engine crossmember and frame.
3. Install the lower control arm nuts and washers. Tighten: Tighten the nuts to 145 N.m (107 lb ft).
4. Connect the electrical wiring harness connectors to the engine crossmember.
5. Install the engine crossmember upper mounting bolts. Do not tighten.
6. Install the engine crossmember lower mounting bolts and nuts. Tighten: Tighten the upper and lower engine crossmember bolts to 65 N.m (48 lb ft).
7. Install the engine crossmember bolt to the left side lower control arm bracket. Tighten: Tighten the bolt to 25 N.m (18 lb ft).
8. Install the left side differential carrier lower mounting bracket bolt. Tighten: Tighten the bolt to 85 N.m (63 lb ft).
9. Install the right side differential carrier lower mounting bracket bolt and nut. Tighten: Tighten the bolt to 85 N.m (63 lb ft).
10. Load the torsion bars. Refer to «Torsion Bar and Support Assembly Replacement»(/chevrolet/chevy-express-h1500/2003-2012/remont/suspension-front/#front-suspension-system) .
11. Remove the supports from the lower control arms.
12. Lower the vehicle.

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/hoistjack/#general-information) .
2. Disconnect the electrical wiring harness connectors from the engine crossmember.
3. Remove the engine crossmember mounting bolts.
4. Remove the engine crossmember.

1. Install the engine crossmember.
2. Install the engine crossmember mounting bolts. Tighten: Tighten the bolts to 120 N.m (89 lb ft).
3. Connect the electrical wiring harness connectors to the engine crossmember.
4. Lower the vehicle.

1. Raise the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/hoistjack/#general-information) .
2. Support the transmission with a safety stand.
3. Remove the brake combination valve to transmission support crossmember mounting bolt.
4. Remove the fuel filter bracket to transmission support crossmember retaining bolts.
5. Remove the transmission mount to the transmission support crossmember retaining nut, for RWD vehicles.
6. Remove the transmission mount to the transmission support crossmember retaining nuts, for 4WD vehicles.
7. Remove the transmission support crossmember to the frame mounting bolts.
8. Remove the transmission support crossmember from the vehicle.

1. Install the transmission support crossmember to the vehicle.
2. Install the transmission support crossmember to the frame mounting bolts. Tighten: Tighten the bolts to 50 N.m (37 lb ft), except Cutaway. Tighten the bolts to 65 N.m (48 lb ft), Cutaway.
3. Install the transmission mount to the transmission support crossmember retaining nuts, for 4WD vehicles. Tighten: Tighten the nuts to 60 N.m (44 lb ft).
4. Install the transmission mount to the transmission support crossmember retaining nut, for RWD vehicles. Tighten: Tighten the nut to 60 N.m (44 lb ft).
5. Install the fuel filter bracket to transmission support crossmember retaining bolts. Tighten: Tighten the bolts to 30 N.m (22 lb ft).
6. Install the brake combination valve to transmission support crossmember mounting bolt. Tighten: Tighten the bolt to 10 N.m (89 lb in).
7. Remove the safety stands.
8. Lower the vehicle.

1. Remove the screws retaining the fuel filter pipe to the body.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/chevy-express-h1500/2003-2012/remont/hoistjack/#general-information) .
3. Use jack stands in order to support the body of the vehicle.
4. Release the brake line retainers closest to the first body mount (2) in order to ensure that the brake lines will not bend when you lower the frame.
5. Loosen all the body mount bolts (5). Do not remove the bolts.
6. Remove the bolt (5) from the body mount.
7. Lower the frame slightly.
8. Remove the body mount from the frame.

1. Install the body mount (2) to the frame.
2. Raise the frame.
3. Install the bolt (5) to the body mount.
4. Install the body mount bolts (5). Tighten: Tighten the body mount bolts to 140 N.m (103 lb ft).
5. Install the brake line retainers.
6. Remove the safety stands.
7. Lower the vehicle.
8. Install the screws retaining the fuel filler pipe to the body.

1. Remove the push pin retainers (3) retaining the wheelhouse extension (2) to the wheelhouse (1).
2. Remove the wheelhouse extension (2) from the wheelhouse (1).

1. Install the wheelhouse extension (2) to the wheelhouse (1).
2. Install the push pin retainers (3) in order to retain the wheelhouse extension (2) to the wheelhouse.

1. Remove the push pin retainers (1) retaining the splash shield (3) to the wheelhouse.
2. Remove the bolt (2) retaining the splash shield (3) to the wheelhouse.
3. Remove the splash shield (3) from the wheelhouse.

1. Install the splash shields (3) to the wheelhouse.
2. Install the bolt (2) in order to retain the splash shield (3) to the wheelhouse. Tighten: Tighten the bolt to 4 N.m (36 lb in).
3. Install the push pin retainers (1) in order to retain the splash shield (3) to the wheelhouse.

1. Remove the hitch to frame mounting bolts and the nuts.
2. Remove the hitch from the vehicle.

1. Install the hitch to the vehicle.
2. Install the hitch to frame mounting nuts and the bolts. Tighten: Tighten the nuts to 88 N.m (65 lb ft).

See also:
• Lifting and Jacking the Vehicle
• Fastener Notice
• Torsion Bar and Support Assembly Replacement