NHTSA ID Number: 10137883
Manufacturer Communication Number: PI1201A
Summary
This preliminary bulletin provides a procedure to replace the exhaust systems with a noisy PEV to correct a cutomers concern of the exhaust rattle, buzz, or pop.
2 Affected Products
Vehicles
Parts
| MUFFLER, EXH (W/EXH PIPE) | CK155 (43) 4.3 (LV3), 5.3-C (L83), CK157 (53) 4.3 (LV3) , 5.3-C (L83) | 20757703 |
| MUFFLER, EXH (W/EXH PIPE) | CK157 (03) 4.3 (LV3), 5.3-C (L83), 6–SPD AUTO TRANS (MYC) | 20757704 |
| MUFFLER, EXH (W/EXH PIPE) | CK157 (43) 4.3 (LV3), 5.3-C (L83) | 20757702 |
| MUFFLER, EXH (W/EXH PIPE) | CK159 (03) 4.3 (LV3), 5.3-C (L83) | 20757701 |
| MUFFLER, EXH (W/EXH PIPE) | CK157 (43) 6.2 (L86) | 23199937 |
| MUFFLER, EXH (W/EXH PIPE) | CK155 (43) 6.2 (L86), CK157 (53) 6.2 (L86) | 23440153 |
SEOCONTENT-START
Bulletin No.: PI1201A
Date: April, 2014
| Subject: | Exhaust Rattle, Buzz, Pop or Whistle |
| Models: | 2014 Chevrolet Silverado 1500 |
| 2014 GMC Sierra 1500 | |
| Equipped with 4.3L, 5.3L or 6.2L Engine (RPOs LV3, L83, L86) | |
| Built Prior to December 8, 2013 or Muffler Julian Date of 352 2 (See Below) |
This PI has been revised to add the 6.2L Engine. Please discard PI1201.
Condition/Concern #1
Some customers may comment on a rattle, buzz and/or pop (oil canning) noise heard coming from the exhaust system under different conditions.
Recommendation/Instructions #1
The correction of the muffler pop or oil canning noise will require the replacement of the cold end or back half of the exhaust system.
Note: The exhaust system rattle can also be diagnosed by tapping on the bottom of the muffler.
Condition/Concern #2
Some customers may comment on a whistle type noise that can be heard coming from the muffler area.
Recommendation/Instructions #2
- Temporarily lock the Passive Exhaust Valve (PEV) in the open position, located behind the muffler, as shown in the illustration above.
- Rotate the Passive Exhaust Valve (PEV) counterclockwise as shown in the illustration above.
- For testing purposes only, obtain a 1/4″ x 20 x 2” steel bolt, nut, lock washer and two large standard 1/4″ x 1” outside diameter washers (body washer), and install the bolt as shown in the illustration above.
- If the condition is reduced or changes greatly in severity, replace the exhaust system.
Condition/Concern #3
Some customers may comment on a vibration in the seat or steering wheel felt when the truck engages V4 mode (Active Fuel Management).
Recommendation/Instructions #3
- Verify the condition.
- Review exhaust system for Ground Outs at the mounts and repair as necessary.
- For testing purposes only, obtain a 1/4″ x 20 x 2” steel bolt, nut, lock washer, and two large standard 1/4″ x 1” outside diameter washers (body washer), and install the bolt as shown in the illustration above.
- If the condition is reduced or changes greatly in severity, replace the exhaust system.
Parts Information
| Description | Usage | Part Number |
| MUFFLER, EXH (W/EXH PIPE) | CK155 (43) 4.3 (LV3), 5.3-C (L83), CK157 (53) 4.3 (LV3) , 5.3-C (L83) | 20757703 |
| MUFFLER, EXH (W/EXH PIPE) | CK157 (03) 4.3 (LV3), 5.3-C (L83), 6–SPD AUTO TRANS (MYC) | 20757704 |
| MUFFLER, EXH (W/EXH PIPE) | CK157 (43) 4.3 (LV3), 5.3-C (L83) | 20757702 |
| MUFFLER, EXH (W/EXH PIPE) | CK159 (03) 4.3 (LV3), 5.3-C (L83) | 20757701 |
| MUFFLER, EXH (W/EXH PIPE) | CK157 (43) 6.2 (L86) | 23199937 |
| MUFFLER, EXH (W/EXH PIPE) | CK155 (43) 6.2 (L86), CK157 (53) 6.2 (L86) | 23440153 |
Warranty Information
For vehicles repaired under warranty, use:
| Labor Operation | Description | Labor Time |
| 4051980 | Exhaust Muffler Replacement | Use Published Labor Operation Time |
SEOCONTENT-END
Bulletin No.: PI1201A
Date: April, 2014
To View or Download this Document Click Here
Bulletin No.: PI1201A
Date: April, 2014
To View or Download this Document Click Here
Bulletin No.: PI1201
Date: March, 2014
To View or Download this Document Click Here
- Vehicle Compatibility - This cat-back exhaust is compatible with 2007-2013 Chevy
Silverado 1500 Crew/Extended Cab Short Bed, 2007-2013 GMC Sierra 1500 Crew/Extended Cab Short Bed - Brilliant Performance - Come with [1] high performance racing design exit cat-back exhaust kit, can increase 15 to 25 horsepower instantly or low end torque and maximize to enhance the exhaust gas flow without sacrificing the aggressive tone sound in the smooth conditions.
- Extraordinary Quality - It is constructed of high quality aluminized steel with computerized mandrel-bends for the strength and durability, and the TIG welded CNC machine can resistant against pressure and corrosion.
- Simple Installation - Easy for the installation, make you enjoy the best performance in the fastest time.
- Product Specification - Major Piping: 3" OD | Inlet: 3" OD | Muffler Tip Type: Round | 4" OD Round Diagonal Cut Muffler Tip
- Dual Cat Back Design with Rear Exit.
- Corrosion Resistant 409 Stainless Steel | 16 Gauge Tubing | 409 Stainless Black Muffler and Clamps.
- Dual Wall Stainless Steel 304 Black Tips | Can Retain your OEM Dual Tips.
- Installs into OEM Hangers | No Welding | Easy at Home Installation.
- Backed by Rough Country's Limited Lifetime Replacement Warranty.
![DNA MOTORING CBE-CS09-4853L-4DR Stainless Steel Cat Back Exhaust System [Compatible with 07-13 Silverado 1500/07-13 Sierra 1500 Crew/Extended Cab Short Bed]](https://m.media-amazon.com/images/I/41UreDyap1L.jpg "Exhaust Rattle, Buzz, Pop or Whistle - 2014 Chevrolet Silverado & GMC Sierra 1500 7")
- 【FITMENT】Compatible with 07-13 Chevy Silverado 1500 Crew/Extended Cab Short Bed; Compatible with 07-13 GMC Sierra 1500 Crew/Extended Cab Short Bed
- 【Quality Construction】Made of High Quality T-409 Stainless Steel with Computerized Mandrel-Bends for Strength and Durability. TIG welded CNC machine flange for resistance against pressure and corrosion.
- 【Enhance Performence】Dyno proven to instantly increases 15 - 25 horsepower / low end torque. Aggressive deep and smooth tone while ensures smooth exhaust gas flow, increase engine output and efficiency.
- 【Muffler & Diameter】2. 5" OD / 3" OD / Louvered Core Muffler
- 【Design】The larger pipes, low-restriction mufflers, and tuned resonators of a well-designed performance exhaust system can make stunned effect on your vehicle: lower auto exhaust back pressure and a much better sound.
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