Contents Wiring diagrams Section: Exterior Body Panels All sections

Bumper System Cadillac STS I

Exterior Body Panels 3 illustrations ~228 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Front Bumper Fascia Reinforcement Screw6 N.m53 lb in
Front Bumper Impact Bar Nut25 N.m18 lb ft
Rear Bumper Energy Absorber Bolt25 N.m18 lb ft
Rear Bumper Energy Absorber Nut6 N.m53 lb in
Rear Bumper Fascia Bracket Bolt3 N.m27 lb in
Rear Bumper Fascia Nuts6 N.m53 lb in
Rear Bumper Fascia Screw3 N.m27 lb in
Rear Bumper Impact Bar Bolt25 N.m18 lb ft

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 6

Scheme 6: Fascia, Extension, Reinforcement, Impact Bar Replacement - Front Bumper
CalloutComponent Name
NOTE: Refer to Fastener Notice in Cautions and Notices. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Front Bumper Fascia Extension Replacement Preliminary Procedures Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the air deflector. Refer to Air Deflector Replacement - Front in Body Front End.
1Retainer, Front Compartment Sight Shield (Qty: 2)
2Shield Assembly, Front Compartment Front Sight
3Retainer, Front Compartment Sight Shield (Qty: 2)
4Shield Assembly, Right Front Compartment Sight
5Retainer, Front Compartment Sight Shield (Qty: 2)
6Shield Assembly, Left Front Compartment Sight
7Retainer, Front Bumper Fascia Extension (Qty: 22)
8Extension, Front Bumper Fascia (Qty: 2)
Front Bumper Fascia Assembly Replacement Preliminary Procedures Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the air deflector. Refer to Air Deflector Replacement - Front in Body Front End.
1Retainer, Front Compartment Sight Shield (Qty: 2)
2Shield Assembly, Front Compartment Sight
3Retainer, Front Compartment Sight Shield (Qty: 2)
4Shield Assembly, Right Front Compartment Sight
5Retainer, Front Compartment Sight Shield (Qty: 2)
6Shield Assembly, Left Front Compartment Sight
7Retainer, Front Bumper Fascia Extension (Qty: 22)
8Extension, Front Bumper Fascia (Qty: 2)
9Connector, Front Side Marker Light Tip: Disconnect the front side marker and fog light connectors.
10Nut, Front Bumper Fascia Reinforcement (Qty: 2) Tighten: 9 N.m (80 lb in)
11Screw, Front Bumper Fascia Reinforcement (Qty: 2) Tighten: 9 N.m (80 lb in)
12Fascia Assembly, Front Bumper Tip: Remove the fascia to tie bar push in retainers (Qty: 4) Disconnect the headlamp washer hose assembly, if equipped.
Front Bumper Fascia Reinforcement Replacement Preliminary Procedures Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the air deflector. Refer to Air Deflector Replacement - Front in Body Front End.
1Retainer, Radiator Support Sight Shield (Qty: 6)
2Shield Assembly, Radiator Support Sight
3Retainer, Front Compartment Sight Shield (Qty: 2)
4Shield Assembly, Right Front Compartment Sight
5Retainer, Front Compartment Sight Shield (Qty: 2)
6Shield Assembly, Left Front Compartment Sight
7Retainer, Front Bumper Fascia Extension (Qty: 22)
8Extension, Front Bumper Fascia (Qty: 2)
9Connector, Front Side Marker Light Tip: Remove and replace the front side marker and fog light connectors.
10Nut, Front Bumper Fascia Reinforcement (Qty: 2) Tighten: 9 N.m (80 lb in)
11Screw, Front Bumper Fascia Reinforcement (Qty: 2) Tighten: 9 N.m (80 lb in)
12Fascia Assembly, Front Bumper Tip: Remove the fascia to tie bar push in retainers (Qty: 4) Disconnect the headlamp washer hose assembly, if equipped.
13Retainer, Front Bumper Fascia Reinforcement (Qty: 2) Tip: Cut the retainer with diagonal cutters to remove, and install using a new retainer.
14Reinforcement, Front Bumper Fascia (Qty: 2)
Front Bumper Impact Bar Assembly Replacement Preliminary Procedures Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the air deflector. Refer to Air Deflector Replacement - Front in Body Front End.
1Retainer, Radiator Support Sight Shield (Qty: 6)
2Shield Assembly, Radiator Support Sight
3Retainer, Front Compartment Sight Shield (Qty: 2)
4Shield Assembly, Right Front Compartment Sight
5Retainer, Front Compartment Sight Shield (Qty: 2)
6Shield Assembly, Left Front Compartment Sight
7Retainer, Front Bumper Fascia Extension (Qty: 22)
8Extension, Front Bumper Fascia (Qty: 2)
9Connector, Front Side Marker Light Tip: Remove and replace the front side marker and fog light connectors.
10Nut, Front Bumper Fascia Reinforcement (Qty: 2) Tighten: 9 N.m (80 lb in)
11Screw, Front Bumper Fascia Reinforcement (Qty: 2) Tighten: 9 N.m (80 lb in)
12Fascia Assembly, Front Bumper Tip: Remove the fascia to tie bar push in retainers (Qty: 4) Disconnect the headlamp washer hose assembly, if equipped.
15Nut, Front Bumper Impact Bar (Qty: 8) Tighten: 25 N.m (18 lb ft)
16Bar Assembly, Front Bumper Impact
Front Bumper Fascia Lower Deflector Replacement
17Retainer, Front Bumper Fascia Lower Deflector (Qty: 6)
18Deflector, Front Bumper Fascia Lower
NOTE
Refer to Fastener Notice in Cautions and Notices.

Fascia, Extension, Reinforcement, Impact Bar Replacement - Front Bumper

Scheme 7

Scheme 7: Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper
CalloutComponent Name
NOTE: Refer to Fastener Notice in Cautions and Notices. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Rear Bumper Fascia Replacement Preliminary Procedure Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the rear wheelhouse liner. Refer to Wheelhouse Liner Panel Replacement - Rear in Body Rear End.
1Screw, Rear Bumper Fascia Tip: The screw is located inside of the wheel opening. Tighten: 3 N.m (27 lb in)
2Plate Assembly, Rear Compartment Sill Trim
3Nuts, Rear Bumper Fascia (Qty: 4) Tighten: 6 N.m (53 lb in)
4Retainer, Rear Bumper Fascia (Qty: 3) Tip: Cut the old retainer with diagonal cutters to remove, and install using a new retainer.
5Fascia Assembly, Rear Bumper Tighten: 6 N.m (53 lb in)
Rear Bumper Impact Bar Assembly Replacement Preliminary Procedure Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the rear wheelhouse liner. Refer to Wheelhouse Liner Panel Replacement - Rear in Body Rear End.
1Screw, Rear Bumper Fascia Tip: The screw is located inside of the wheel opening. Tighten: 3 N.m (27 lb in)
2Plate Assembly, Rear Compartment Sill Trim
3Nuts, Rear Bumper Fascia (Qty: 4) Tighten: 6 N.m (53 lb in)
4Retainer, Rear Bumper Fascia (Qty: 3) Tip: Cut the old retainer with diagonal cutters to remove, and install using a new retainer.
5Fascia Assembly, Rear Bumper Tighten: 6 N.m (53 lb in)
6Bolts, Rear Bumper Impact Bar (Qty: 8) Tighten: 25 N.m (18 lb ft)
7Bar Assembly, Rear Bumper Impact
Rear Bumper Energy Absorber Assembly Replacement Preliminary Procedure Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the rear wheelhouse liner. Refer to Wheelhouse Liner Panel Replacement - Rear in Body Rear End.
1Screw, Rear Bumper Fascia Tip: The screw is located inside of the wheel opening. Tighten: 3 N.m (27 lb in)
2Plate Assembly, Rear Compartment Sill Trim
3Nuts, Rear Bumper Fascia (Qty: 4) Tighten: 6 N.m (53 lb in)
4Retainer, Rear Bumper Fascia (Qty: 3) Tip: Cut the old retainer with diagonal cutters to remove, and install using a new retainer.
5Fascia Assembly, Rear Bumper Tighten: 6 N.m (53 lb in)
6Bolts, Rear Bumper Impact Bar (Qty: 8) Tighten: 25 N.m (18 lb ft)
7Bar Assembly, Rear Bumper Impact
8Bolt, Rear Bumper Energy Absorber (Qty: 2) Tighten: 25 N.m (18 lb ft)
9Nut, Rear Bumper Energy Absorber (Qty: 4) Tighten: 25 N.m (18 lb ft)
10Absorber Assembly, Rear Bumper Energy
Rear Bumper Fascia Bracket Replacement Preliminary Procedure Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the rear wheelhouse liner. Refer to Wheelhouse Liner Panel Replacement - Rear in Body Rear End.
1Screw, Rear Bumper Fascia Tip: The screw is located inside of the wheel opening. Tighten: 3 N.m (27 lb in)
2Plate Assembly, Rear Compartment Sill Trim
3Nuts, Rear Bumper Fascia (Qty: 4) Tighten: 6 N.m (53 lb in)
4Retainer, Rear Bumper Fascia (Qty: 3) Tip: Cut the old retainer with diagonal cutters to remove, and install using a new retainer.
5Fascia Assembly, Rear Bumper Tighten: 6 N.m (53 lb in)
11Bolt, Rear Bumper Fascia Bracket (Qty: 10) Tighten: 3 N.m (27 lb in)
12Bracket, Rear Bumper Fascia (Qty: 2)
Rear Bumper Fascia Insert Replacement
13Retainer, Rear Bumper Fascia Insert (Qty: 2)
14Insert, Rear Bumper Fascia
Rear Bumper Fascia Energy Absorber Replacement Preliminary Procedure Lift and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. Remove the rear wheelhouse liner. Refer to Wheelhouse Liner Panel Replacement - Rear in Body Rear End.
1Screw, Rear Bumper Fascia Tighten: 3 N.m (27 lb in)
2Plate Assembly, Rear Compartment Sill Trim
3Nuts, Rear Bumper Fascia (Qty: 4) Tighten: 6 N.m (53 lb in)
4Retainer, Rear Bumper Fascia (Qty: 3) Tip: Cut the old retainer with diagonal cutters to remove, and install using a new retainer.
5Fascia Assembly, Rear Bumper Tighten: 6 N.m (53 lb in)
15Absorber, Rear Bumper Fascia Energy
NOTE
Refer to Fastener Notice in Cautions and Notices.

Fascia, Bracket, Bar, Absorber Replacement - Rear Bumper

Scheme 8

Scheme 8: Fascia Grille Replacement
CalloutComponent Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Radiator Grille Assembly Replacement Preliminary Procedures Remove the front compartment sight shields. Refer to Sight Shields, Hood Adjuster, Hood Bumper, Hood Latch Replacement in Body Front End. Remove the fascia to tie bar push in retainers (Qty: 4) and pull the top of the front fascia out far enough to gain access to the fascia grille retainers.
1Retainer, Radiator Grille (Qty: 4) Tip: There are two push in retainers on each side of the grille.
2Grille Assembly, Radiator
3Insert, Radiator Grille
Radiator Lower Grille Assembly Replacement Preliminary Procedure: Remove the lower air deflector assembly. Refer to Air Deflector Replacement - Front in Body Front End.
4Filler, Radiator Grille Opening
5Bezel, Radiator Grille Opening
6Screen Assembly, Radiator Grille

Fascia Grille Replacement

Bumper and Fascia Description

General Motors passenger vehicle bumpers are designed to withstand a collision into a fixed barrier at 8 km/h (5 mph). 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 are achieved through one of the following components in each bumper

  1. A honeycomb type energy absorbing structure
  2. A foam type energy absorbing structure
  3. An impact bar bracket 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.