GST-TSB-20-001

February 21, 2020

Page 9 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Fender Liner Modification (continued)

9. Using the step drill bit, drill two holes in the fender liner at the identifying marks.
NOTE
Set the drill stop to 5/16 in. – 3/8 in. (8 mm – 9 mm) and drill both sides to remove the flash from the
fender liner.
Figure 8.

10. Repeat the same procedure for the passenger side.
NOTE
Make sure to use the passenger side template.

GST-TSB-20-001

February 21, 2020

Page 10 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification
PRECAUTIONS AND PROPER USE OF CUTTING PLIERS
BEFORE proceeding, it is important to understand the proper use of the cutting pliers. Read this section
thoroughly to ensure proper use BEFORE front bumper cover modification.
 One side of the pliers is marked red.
THE RED SIDE OF THE PLIERS IS
TO BE USED AGAINST THE PAINTED
SURFACE ONLY (paint against paint).

Figure 9. Red Side

 When holding the cutting pliers in place, it is important to keep the pliers at a 90-degree angle
as shown.
Figure 10.

1

Bumper Cover

4

Red Jaw

2

Paint

5

90-Degree Edge to Surface

3

Tape

GST-TSB-20-001

February 21, 2020

Page 11 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)
PRECAUTIONS AND PROPER USE OF CUTTING PLIERS (continued)
 Do NOT make full cuts across the face
of the bumper cover.
 ONLY MAKE HALF CUTS BEFORE
MOVING TO MAKE THE NEXT CUT.

Figure 11. Top to Bottom

NOTICE
Failure to make ONLY half cuts
may result in uneven cuts,
a wavy appearance, or
bumper replacement.

Figure 12. Half Cuts Along Same Line

1

Cut 1

2

Cut 2

GST-TSB-20-001

February 21, 2020

Page 12 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)
PRECAUTIONS AND PROPER USE OF CUTTING PLIERS (continued)

Figure 13. Examples of Half Cuts

1

Cut 1

3

Cut 3

2

Cut 2

4

Cut 4

 The depth of the cutting pliers is less than the maximum depth of the area to be removed.
 It is necessary to first make a preliminary cut to remove approximately half of the area (between
the arrows).

Figure 14.

1

Depth of Cutting Pliers

2

Area of Removal (Between Rows)

GST-TSB-20-001

February 21, 2020

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)
PRECAUTIONS AND PROPER USE OF CUTTING PLIERS (continued)

Figure 15. Good Example

Figure 16. Bad Example

Page 13 of 20

GST-TSB-20-001

February 21, 2020

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

1. Carefully pull the fender liner back and secure it to the lower control arm.
Figure 17.

Page 14 of 20

GST-TSB-20-001

February 21, 2020

Page 15 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

2. Using warm water and a lint-free cloth, clean the work area, ensuring ALL debris is removed.
Figure 18.

3. Locate the left-hand bumper template and
secure it to the bumper cover with a clamp.

Figure 19.

GST-TSB-20-001

February 21, 2020

Page 16 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

4. Cut an 8-in. (203 mm) strip of
double-sided foam tape and apply it to
the edge of the marking template.
Ensure the tape is straight and flush
against the template.

Figure 20.

NOTE
 Do NOT remove the backing from the tape.
 A NEW piece of tape MUST be used when
repeating this step for the opposite side.

5. Remove the marking template and clamp.

Figure 21.

GST-TSB-20-001

February 21, 2020

Page 17 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

6. Make the preliminary cut, removing
approximately half of the area (between
the arrows).

Figure 22.

7. Starting at the outer edge, trim along the
tape working toward the inside with
overlapping cuts.

Figure 23.

NOTICE
BEFORE each cut, ensure the cutting
pliers are held at a 90-degree angle and
rest against the tape. Failure to do so may
result in uneven cuts and bumper
cover replacement.

GST-TSB-20-001

February 21, 2020

Page 18 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

8. Once the cutting is complete, remove the tape.
9. Apply masking tape to the painted edge of the bumper cover just above and below the top of
the cut.
Figure 24.

GST-TSB-20-001

February 21, 2020

Page 19 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

10. Use the foam sanding block to lightly sand the cut edges to remove any sharp edges or burrs.
When sanding, use light pressure and keep the block square with the edge. Only a few strokes
should be required to ensure the edges are smooth.
Figure 25.

11. Remove the tape and clean the bumper surface as performed in step 2.

12. Return the fender liner back to its original position and reinstall the two fender liner fasteners.
NOTE
 The fasteners MUST be inserted into the two NEW holes drilled in step 9 of the Fender Liner
Modification section.
 The silver fastener MUST be in the front location and the black fastener in the rear location.

GST-TSB-20-001

February 21, 2020

Page 20 of 20

GST Blackout Package Wheel Bumper/Fender Interference
Repair Procedure (continued)
Front Bumper Cover Modification (continued)

13. Using your hands, verify the fender liner
and bumper are flush.

Figure 26.

14. Repeat both procedures (Fender Liner Modification and Front Bumper Cover Modification) on
the passenger side of the vehicle.

15. Install the front wheels.
Refer to TIS:
Accessory – Accessories Installation – “TRD Alloy Wheel PTR20-35110-BK Matte Black”