Contents Wiring diagrams Section: Exterior Body Panels All sections

Bumper System Buick LaCrosse I

Exterior Body Panels 5 illustrations ~266 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Center Support Bracket Bolts10 N.m88 lb in
Front Bumper Fascia Lower Center Support Bracket Bolts10 N.m88 lb in
Front Bumper Fascia Side Support to Radiator Support Bolts10 N.m88 lb in
Front Bumper Fascia Side Supports Bolts10 N.m88 lb in
Front Bumper Fascia to Fender Bolts10 N.m88 lb in
Front Bumper Fascia Upper Support at Radiator Support Bolts10 N.m88 lb in
Front Bumper Impact Bar at Frame Bolts25 N.m18 lb ft
Grille Studs Nuts5 N.m44 lb in
Rear Bumper Fascia Outer Retainer Bolt10 N.m88 lb in
Rear Bumper Fascia Outer Retainer in Rear Compartment Bolt6 N.m53 lb in
Rear Bumper Fascia Outer Retainer Nut6 N.m53 lb in
Rear Bumper Fascia Splash Shield to Body Bolts2 N.m18 lb in
Rear Bumper Fascia Splash Shield to Body Nut2 N.m18 lb in
Rear Bumper Impact Bar at Frame Bolts25 N.m18 lb ft
Upper Front Bumper Fascia Support Bolts2 N.m18 lb in

Fastener Tightening Specifications

Inspection After Collision

If a severe collision dislodges the bumper from the original position, you may need to replace the following components

  1. The bumper fascia
  2. The bumper energy absorber
  3. The bumper impact bar

Scheme 8

Scheme 8: Fascia, Absorber, Reinforcement Replacement - Front Bumper
CalloutComponent Name
NOTE: Refer to Fastener Notice in General Information. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Front Fascia Replacement Preliminary Procedures Remove the upper and lower fascia grilles. Refer to Fascia Grille Replacement - Front Bumper - Lower . Remove fog lamp. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front . Remove turn signal lamp. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front .
1Screw, Front Fascia (Qty: 4) Tighten: 2 N.m (18 lb in)
2Nut, Front Fascia (Qty: 4) Tighten: 10 N.m (88 lb in)
3Retainer, Front Fascia (Qty: 6)
4Retainer, Front Fascia (Qty: 2)
5Retainer, Front Fascia (Qty: 2)
6Retainer, Absorber (Qty: 3)
7Fascia, Front Bumper Fascia
Front Bumper Absorber Replacement Preliminary Procedures Remove fog lamp. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front . Remove turn signal lamp. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front .
1Screw, Front Fascia (Qty: 4) Tighten: 2 N.m (18 lb in)
2Nut, Front Fascia (Qty: 4) Tighten: 10 N.m (88 lb in)
3Retainer, Front Fascia (Qty: 6)
4Retainer, Front Fascia (Qty: 2)
5Retainer, Front Fascia (Qty: 2)
6Retainer, Absorber (Qty: 3)
7Fascia, Front Bumper Fascia
8Absorber, Front Bumper
Front Bumper Impact Bar Replacement Preliminary Procedures Remove fog lamp. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front . Remove turn signal lamp. Refer to Headlamp, Fog Lamp, Turn Signal Lamp, Side Marker Lamp Replacement - Front .
1Screw, Front Fascia (Qty: 4) Tighten: 2 N.m (18 lb in)
2Nut, Front Fascia (Qty: 4) Tighten: 10 N.m (88 lb in)
3Retainer, Front Fascia (Qty: 6)
4Retainer, Front Fascia (Qty: 2)
5Retainer, Front Fascia (Qty: 2)
6Retainer, Absorber (Qty: 3)
7Fascia, Front Bumper Fascia
8Absorber, Front Bumper
9Bolt, Front Bumper Impact Bar (Qty: 4) Tighten: 25 N.m (18 lb ft)
10Bar, Front Bumper
NOTE
Refer to Fastener Notice in General Information.

Fascia, Absorber, Reinforcement Replacement - Front Bumper

Scheme 9

Scheme 9: Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper
CalloutComponent Name
NOTE: Refer to Fastener Notice in General Information. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedures: Remove the license lamp. Refer to Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear in Lighting Systems.
Rear Fascia Replacement
1Retainer, Rear Fascia (Qty: 2)
2Retainer, Rear Fascia (Qty: 4)
3Nut, Rear Fascia (Qty: 2) Tighten: 6 N.m (53 lb in)
4Bolt, Rear Fascia (Qty: 2) Tighten: 10 N.m (88 lb in)
5Bolt, Rear Fascia (Qty: 6) Tighten: 10 N.m (88 lb in)
6Fascia, Rear Fascia
Rear Energy Absorber Replacement
1Retainer, Rear Fascia (Qty: 2)
2Retainer, Rear Fascia (Qty: 4)
3Nut, Rear Fascia (Qty: 2) Tighten: 6 N.m (53 lb in)
4Bolt, Rear Fascia (Qty: 2) Tighten: 10 N.m (88 lb in)
5Bolt, Rear Fascia (Qty: 6) Tighten: 10 N.m (88 lb in)
6Fascia, Rear Fascia
7Retainer, Energy Absorber (Qty: 1)
8Absorber, Rear Energy Absorber
Rear Impact Bar Replacement
1Retainer, Rear Fascia (Qty: 2)
2Retainer, Rear Fascia (Qty: 4)
3Nut, Rear Fascia (Qty: 2) Tighten: 6 N.m (53 lb in)
4Bolt, Rear Fascia (Qty: 2) Tighten: 10 N.m (88 lb in)
5Bolt, Rear Fascia (Qty: 6) Tighten: 10 N.m (88 lb in)
6Fascia, Rear Fascia
7Retainer, Energy Absorber (Qty: 1)
8Absorber, Rear Energy Absorber
9Bolts, Rear Impact Bar (Qty: 6) Tighten: 25 N.m (18 lb ft)
10Bar, Rear Impact Bar
NOTE
Refer to Fastener Notice in General Information.

Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper

Scheme 10

Scheme 10: Air Deflector Replacement - Front Bumper Fascia
CalloutComponent Name
NOTE: Refer to Fastener Notice in General Information. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedures: Raise and support vehicle. Refer to Lifting and Jacking the Vehicle .
1Screw, Air Deflector (Qty: 4) Tighten: 2 N.m (18 lb in)
2Screw, Air Deflector (Qty: 4) Tighten: 2 N.m (18 lb in)
3Retainer, Air Deflector (Qty: 5)
4Bolt, Air Deflector (Qty: 3) Tighten: 10 N.m (89 lb in)
5Deflector, Air Deflector
NOTE
Refer to Fastener Notice in General Information.

Air Deflector Replacement - Front Bumper Fascia

Scheme 11

Scheme 11: Fascia Grille Replacement - Front Bumper - Lower
CalloutComponent Name
NOTE: Refer to Fastener Notice in General Information. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Radiator Grille Assembly Replacement Preliminary Procedures: Remove the radiator support sight shield. Refer to Radiator Support Sight Shield Replacement in Body Front End.
1Retainer, Radiator Grille (Qty: 4)
2Bumper, Grille Retainer (Qty: 4)
3Nut, Grille Assembly (Qty: 2) Tighten: 2 N.m (18 lb in)
4Grille Assembly, Radiator
5Moulding, Radiator Grille
Radiator Lower Grille Assembly Replacement
6Screen Assembly, Radiator Grille
NOTE
Refer to Fastener Notice in General Information.

Fascia Grille Replacement - Front Bumper - Lower

Bumper and Fascia Description

General Motors passenger vehicle bumpers are designed to withstand a collision into a fixed barrier at 5 mph (8 km/h). After absorbing the energy of the collision, the bumper energy absorbers rebound to 80-90 percent of their original position. The bumper energy absorbing capability of the front and the rear bumper systems is achieved through one of the following components in each bumper

  1. A honeycomb type energy absorbing structure
  2. A foam type energy absorbing structure

The front and the rear bumper fascias are made of urethane. Urethane withstands minor impact and returns to the original shape.

Refer to General Plastic Repair Instructions in Plastic Panel Information and Repair for repair or refinishing information on the bumper fascia.

Special Tools

Special Tools Illustration Tool Number/Description J 38778 Door Trim Pad and Garnish Clip Remover

Scheme 12

Scheme 12: Special Tools