Wind noise tsb

[MLB57]

Condition
Some customers may comment on hearing excessive wind noise coming from the rear interior of the vehicle.

Cause #1
This condition may be caused by a void in the body filler within the C-pillar.

Cause #2

Object ID: 2493484Click here for detailed picture of the image.

This condition may be a result of the design of the body rear panel acoustic insulator that is mounted behind the rear seat. The insulator could be one of several early designs (1 or 2 in the above graphic), which demonstrated a lesser success of minimizing wind noise.

Correction #1 – (2007-2010 Model Years Only)
Important: Prior to attempting a repair of the vehicle, it will be necessary to compare it to a like vehicle in similar operating characteristics to determine if it should be considered normal operation or a repairable condition.

 1. To properly diagnose the C-pillar body filler issue, complete the following steps:
1.1. Close the all doors and windows of the vehicle.
1.2. Without starting the vehicle, turn the vehicle ignition to the ON/RUN position.
1.3. Press the HVAC selector switch for Outside Air.
1.4. Turn the HVAC Fan Control to Medium/High.
Object ID: 2438941Click here for detailed picture of the image.

Note: The air flow that is felt most commonly exits the lower C-pillar opening shown in the graphic above.

1.5. Run your hand alongside the lower seam of the body at the base of the C-pillar and feel for air flowing out of the bottom of the body.
1.6. Compare the air flow on the opposite side of the vehicle. If one side exhibits a distinct higher amount of air flow, continue on to the next step in this procedure to start the process of adding sealer to the C-pillar on that side. If no air flow difference is found, skip ahead to Correction #2.
 2. To access the inner C-pillar, remove the rear seat and the body lock pillar trim panel. Refer to Body Lock Pillar Trim Replacement (Crew Cab) or Body Lock Pillar Trim Replacement (Extended Cab) in SI.
Figure 1 — Outside View Through C-pillar

Object ID: 2438945Click here for detailed picture of the image.
Figure 2 — Top View, Section Cut Through C-pillar

Object ID: 2438951Click here for detailed picture of the image.

 3. Inspect the inner baffle/foam within the C-pillar for any voids in the body filler. The examples above show an opening (1) in the baffle at the forward, inboard corner of the right side C-pillar.
Object ID: 2438957Click here for detailed picture of the image.

 4. If a void is found (1), fill it with seam sealer Kent Automotive High-Tech™ Clear Sealer, P/N P10200 (5 oz. tube), or equivalent, to eliminate the air flow escape concern.
 5. Before reassembly, verify replacement of the proper latest generation body rear panel insulator following the information referenced in Correction #2.
Correction #2 – (2012 and Prior Vehicles, Based on Build Breakpoints in Table)
This repair pertains to the following vehicles:

Plant
Plant Code (VIN Position 11)
Build Date Breakpoint

Flint
F
Built Prior to July 26, 2011

Fort Wayne
Z
Built Prior to July 26, 2011

Silao
G
Built Prior to June 1, 2011

Object ID: 2745858Click here for detailed picture of the image.

Note: Vehicles built after the breakpoints noted should have the latest generation body rear panel insulator (shown in graphic above), which is more robust and has the rubber side visible. Verify the vehicle having this latest generation insulator, and if not, order a new service part insulator referencing the parts table below.

Replace the body rear panel insulator, and add additional sound proofing material, following the steps below:

 1. Remove the body rear panel insulator. Refer to Body Rear Panel Insulator Replacement (Extended Cab/Crew Cab) in SI.
Note: It has been found that controlling the wind noise at the two pressure relief valve (PRV) locations is the key to quieting the rear cab wind noise. The additional sound proofing steps below have been found to be successful in eliminating most of the objectionable noise.

 2. Prior to installing the new insulator service part, complete the following sound proofing steps:
Note: GM P/N 12378195 is not available in Canada. However several equivalents such as *Evercoat (Q-Pads) P/N 100116 and *Dominion Sure Seal (Sound Deadener Pads) BSDE Part 110900 are available through NAPA Auto Parts retailers. Information for finding your local retail location can be obtained online at www.napacanada.com.

Object ID: 2745861Click here for detailed picture of the image.

◦Install noise and vibration sound deadening pads (1) to backside of the body rear panel insulator. Follow the pattern shown above, ensuring they cover the two pressure relief valve (PRV) locations. Use GM P/N 12378195, or equivalents commercially available through *Dynamat®, Evercoat® or Dominion Sure Seal.
Object ID: 2745863Click here for detailed picture of the image.

Important: Ensure that the shim stock foam pattern does not have any gaps in the corners and that it is securely pressed/attached to the inner rear body panel.

◦On both sides of the vehicle, install a double thickness of Kent Automotive Adhesive Back Shim Stock P/N 46515, or equivalent, partially around the two PRV's. Install the foam across the top (1), down the outboard side (2), underneath (3), partially back up the inboard side (4), then finish with a length extending further inboard (5) from the PRV.
Important: Ensure that any C-pillar wiring harnesses/connectors are routed forward of the insulator, and not trapped behind it.

 3. Position the body rear panel insulator to the inner rear body panel and install the push pin retainers. Caution should be taken to not disturb the shim stock installed previously.
Object ID: 2745864Click here for detailed picture of the image.

Important: Ensure that the foam is securely wedged between the outboard edges of the insulator and the wiring harnesses/sheet metal, making sure that any C-pillar wiring harnesses/connectors are routed forward of the insulator and foam, and not trapped behind either of them.

 4. Install a length of *Duck Brand Window Air Conditioner Insulating Strip Seal P/N 1284075, or equivalent, down each side C-pillar. Ensure that the foam extends from the top of the insulator to the floor of the vehicle.
Tip: When completing installation of the insulator panel, ensure that the access flap (1) is closed and fully seated into the rest of the insulator material.

 5. Complete the installation of the insulator panel and interior trim. Refer to Body Rear Panel Insulator Replacement (Extended Cab/Crew Cab) in SI.
* We believe this source and their products to be reliable. There may be additional manufacturers of such products/materials. General Motors does not endorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be available from other sources.

Parts Information
Contact Kent Automotive at 1–888–YES-KENT or online at www.kent-automotive.com.

Duck Brand products, or equivalent, can be obtained from your local hardware or home improvement store.

Part Number
Description
Material Allowance

P10200
Kent Automotive High-Tech™ Clear Sealer (5 oz)
$2.10

22854528
INSULATOR ASM-BODY RR PNL - Regular Cab
N/A

22854529
INSULATOR-BODY RR PNL - Hybrid Only
N/A

22854530
INSULATOR-BODY RR PNL - Ext and Crew Cab
N/A

12378195*
Sound Deadening Pad Kit
N/A

P46515
Kent Automotive Adhesive Back Shim Stock (1 in wide x 9/16 in thick)
$10.00 (per vehicle)

1284075
Duck Brand Window Air Conditioner Insulating Strip Seal (2¼ in x 2¼ in x 42 in)
$6.30 (2 packages)


*GM♦P/N♦12378195 is not available in Canada. However several equivalents such as Evercoat (Q-Pads) P/N 100116 and Dominion Sure Seal (Sound Deadener Pads) BSDE Part 110900 are available through NAPA Auto Parts retailers. Information for finding your local retail location can be obtained online at www.napacanada.com. Dominion Sure Seal (Sound Deadener Pads) BSDE Part 110900 can be obtained by contacting Dominion Sure Seal at 1-800-265-0790.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

C9934*
R&R Body Lock Pillar Trim – Apply Sealer in C-pillar
0.7 hr

C9941*
Body Rear Panel Insulator Replacement and Soundproofing
1.3 hrs
Posted via Mobile Device

[MLB57]

[thought I would post this for anyone with reg. Cab. This noise really showed up after sound deading the cab QUOTE=MLB57;8084420]Condition
Some customers may comment on hearing excessive wind noise coming from the rear interior of the vehicle.

Cause #1
This condition may be caused by a void in the body filler within the C-pillar.

Cause #2

Object ID: 2493484Click here for detailed picture of the image.

This condition may be a result of the design of the body rear panel acoustic insulator that is mounted behind the rear seat. The insulator could be one of several early designs (1 or 2 in the above graphic), which demonstrated a lesser success of minimizing wind noise.

Correction #1 – (2007-2010 Model Years Only)
Important: Prior to attempting a repair of the vehicle, it will be necessary to compare it to a like vehicle in similar operating characteristics to determine if it should be considered normal operation or a repairable condition.

 1. To properly diagnose the C-pillar body filler issue, complete the following steps:
1.1. Close the all doors and windows of the vehicle.
1.2. Without starting the vehicle, turn the vehicle ignition to the ON/RUN position.
1.3. Press the HVAC selector switch for Outside Air.
1.4. Turn the HVAC Fan Control to Medium/High.
Object ID: 2438941Click here for detailed picture of the image.

Note: The air flow that is felt most commonly exits the lower C-pillar opening shown in the graphic above.

1.5. Run your hand alongside the lower seam of the body at the base of the C-pillar and feel for air flowing out of the bottom of the body.
1.6. Compare the air flow on the opposite side of the vehicle. If one side exhibits a distinct higher amount of air flow, continue on to the next step in this procedure to start the process of adding sealer to the C-pillar on that side. If no air flow difference is found, skip ahead to Correction #2.
 2. To access the inner C-pillar, remove the rear seat and the body lock pillar trim panel. Refer to Body Lock Pillar Trim Replacement (Crew Cab) or Body Lock Pillar Trim Replacement (Extended Cab) in SI.
Figure 1 — Outside View Through C-pillar

Object ID: 2438945Click here for detailed picture of the image.
Figure 2 — Top View, Section Cut Through C-pillar

Object ID: 2438951Click here for detailed picture of the image.

 3. Inspect the inner baffle/foam within the C-pillar for any voids in the body filler. The examples above show an opening (1) in the baffle at the forward, inboard corner of the right side C-pillar.
Object ID: 2438957Click here for detailed picture of the image.

 4. If a void is found (1), fill it with seam sealer Kent Automotive High-Tech™ Clear Sealer, P/N P10200 (5 oz. tube), or equivalent, to eliminate the air flow escape concern.
 5. Before reassembly, verify replacement of the proper latest generation body rear panel insulator following the information referenced in Correction #2.
Correction #2 – (2012 and Prior Vehicles, Based on Build Breakpoints in Table)
This repair pertains to the following vehicles:

Plant
Plant Code (VIN Position 11)
Build Date Breakpoint

Flint
F
Built Prior to July 26, 2011

Fort Wayne
Z
Built Prior to July 26, 2011

Silao
G
Built Prior to June 1, 2011

Object ID: 2745858Click here for detailed picture of the image.

Note: Vehicles built after the breakpoints noted should have the latest generation body rear panel insulator (shown in graphic above), which is more robust and has the rubber side visible. Verify the vehicle having this latest generation insulator, and if not, order a new service part insulator referencing the parts table below.

Replace the body rear panel insulator, and add additional sound proofing material, following the steps below:

 1. Remove the body rear panel insulator. Refer to Body Rear Panel Insulator Replacement (Extended Cab/Crew Cab) in SI.
Note: It has been found that controlling the wind noise at the two pressure relief valve (PRV) locations is the key to quieting the rear cab wind noise. The additional sound proofing steps below have been found to be successful in eliminating most of the objectionable noise.

 2. Prior to installing the new insulator service part, complete the following sound proofing steps:
Note: GM P/N 12378195 is not available in Canada. However several equivalents such as *Evercoat (Q-Pads) P/N 100116 and *Dominion Sure Seal (Sound Deadener Pads) BSDE Part 110900 are available through NAPA Auto Parts retailers. Information for finding your local retail location can be obtained online at www.napacanada.com.

Object ID: 2745861Click here for detailed picture of the image.

◦Install noise and vibration sound deadening pads (1) to backside of the body rear panel insulator. Follow the pattern shown above, ensuring they cover the two pressure relief valve (PRV) locations. Use GM P/N 12378195, or equivalents commercially available through *Dynamat®, Evercoat® or Dominion Sure Seal.
Object ID: 2745863Click here for detailed picture of the image.

Important: Ensure that the shim stock foam pattern does not have any gaps in the corners and that it is securely pressed/attached to the inner rear body panel.

◦On both sides of the vehicle, install a double thickness of Kent Automotive Adhesive Back Shim Stock P/N 46515, or equivalent, partially around the two PRV's. Install the foam across the top (1), down the outboard side (2), underneath (3), partially back up the inboard side (4), then finish with a length extending further inboard (5) from the PRV.
Important: Ensure that any C-pillar wiring harnesses/connectors are routed forward of the insulator, and not trapped behind it.

 3. Position the body rear panel insulator to the inner rear body panel and install the push pin retainers. Caution should be taken to not disturb the shim stock installed previously.
Object ID: 2745864Click here for detailed picture of the image.

Important: Ensure that the foam is securely wedged between the outboard edges of the insulator and the wiring harnesses/sheet metal, making sure that any C-pillar wiring harnesses/connectors are routed forward of the insulator and foam, and not trapped behind either of them.

 4. Install a length of *Duck Brand Window Air Conditioner Insulating Strip Seal P/N 1284075, or equivalent, down each side C-pillar. Ensure that the foam extends from the top of the insulator to the floor of the vehicle.
Tip: When completing installation of the insulator panel, ensure that the access flap (1) is closed and fully seated into the rest of the insulator material.

 5. Complete the installation of the insulator panel and interior trim. Refer to Body Rear Panel Insulator Replacement (Extended Cab/Crew Cab) in SI.
* We believe this source and their products to be reliable. There may be additional manufacturers of such products/materials. General Motors does not endorse, indicate any preference for, or assume any responsibility for the products or material from this firm or for any such items that may be available from other sources.

Parts Information
Contact Kent Automotive at 1–888–YES-KENT or online at www.kent-automotive.com.

Duck Brand products, or equivalent, can be obtained from your local hardware or home improvement store.

Part Number
Description
Material Allowance

P10200
Kent Automotive High-Tech™ Clear Sealer (5 oz)
$2.10

22854528
INSULATOR ASM-BODY RR PNL - Regular Cab
N/A

22854529
INSULATOR-BODY RR PNL - Hybrid Only
N/A

22854530
INSULATOR-BODY RR PNL - Ext and Crew Cab
N/A

12378195*
Sound Deadening Pad Kit
N/A

P46515
Kent Automotive Adhesive Back Shim Stock (1 in wide x 9/16 in thick)
$10.00 (per vehicle)

1284075
Duck Brand Window Air Conditioner Insulating Strip Seal (2¼ in x 2¼ in x 42 in)
$6.30 (2 packages)


*GM♦P/N♦12378195 is not available in Canada. However several equivalents such as Evercoat (Q-Pads) P/N 100116 and Dominion Sure Seal (Sound Deadener Pads) BSDE Part 110900 are available through NAPA Auto Parts retailers. Information for finding your local retail location can be obtained online at www.napacanada.com. Dominion Sure Seal (Sound Deadener Pads) BSDE Part 110900 can be obtained by contacting Dominion Sure Seal at 1-800-265-0790.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

C9934*
R&R Body Lock Pillar Trim – Apply Sealer in C-pillar
0.7 hr

C9941*
Body Rear Panel Insulator Replacement and Soundproofing
1.3 hrs
Posted via Mobile Device[/QUOTE]
Posted via Mobile Device