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
Bestseller No. 1
Auto Dynasty 4" Catback Exhaust Tip System For 07-13 Silverado Sierra 1500
- 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
Bestseller No. 2
![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 8")
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]
- 【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.
Bestseller No. 3
VIMLUK 409SS Exhaust Flex Pipe & Exhaust Front Pipe - Direct Replacement for 2013-2018 Buick Encore 1.4L & 2015-2019 Chevy Trax 1.4L Replacement with 42686958;42444445; 95437532; 25950867(VK-52572)
- 📦✓ Precision Fit for 1.4L Turbo Models – Direct bolt-on replacement for 2013-2018 Buick Encore (1.4L L4 Gas ) and 2015-2019 Chevy Trax (1.4L L4 Gas). Compatible with Buick Encore Base, Convenience, Leather, Essence, Preferred, Preferred II, Premium, Sport Touring trims; and Chevy Trax LS, LT, LTZ, Premier trims. References OEM part numbers: 42686958, 42444445, 95437532, 25950867. No modifications required.
- 2. ✅ One-Piece Mandrel-Bent Design – ✓No Leak-Prone Joints – Unlike cheaper two-piece exhaust pipes that use clamps or couplers, this front pipe is formed from a single continuous mandrel-bent tube.✓ No clamps, no slip joints, and no weak points—eliminating common failure areas where leaks, rust, and breakage often occur. Built for superior structural integrity and longer service life.
- 3. 🛡️Premium Hybrid Material Construction – Engineered with application-specific materials: The flexible corrugated section is made from 304 stainless steel for excellent flexibility and resistance to oxidation and fatigue. The main pipe body is constructed from durable 409 stainless steel for heat resistance and structural strength. Flanges are made from heavy-duty alloy steel for secure, long-lasting mounting.
- 4. 🔧 Includes Essential Installation Hardware – Comes complete with a high-quality gasket and 5 flange nuts for a proper seal and secure connection. (Original bolts are recommended for reuse to ensure optimal fit.) Everything you need for a straightforward, professional-grade installation right out of the box.
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Bestseller No. 4
Rough Country Dual Cat-Back Exhaust for 2014-2018 Chevy/GMC 1500 | 5.3L - 96007
- Dual Cat Back Design w/ Side Exit.
- Corrosion Resistant 409 Stainless Steel | 16 Gauge Tubing.
- Dual Wall Stainless Steel 304 Black Tips.
- Installs into OEM Hangers | No Welding | Easy at Home Installation.
- Backed by Rough Country's Limited Lifetime Replacement Warranty.
Bestseller No. 5
Walker 40295 Exhaust Y Pipe 3" Outlet (OD) for Chevrolet C1500
- COMPATIBILITY – Fits 1992-1992 Chevrolet Blazer; 1993-1993 Chevrolet Blazer; 1994-1994 Chevrolet Blazer; 1988-1988 Chevrolet C1500; 1989-1989 Chevrolet C1500; 1990-1990 Chevrolet C1500; 1991-1991 Chevrolet C1500; 1992-1992 Chevrolet C1500; 1993-1993 Chevr
- GET THE RIGHT PART -- Before purchasing, please check the “Amazon Confirmed Fit” bar to ensure this part will fit your vehicle; enter all vehicle information (year, make, model, engine and trim) for compatibility and check qualifier notes. If the “Amazon Confirmed Fit” bar has an “i” in a blue circle, this product has additional notes. Please hover over the “i” on the bar to see notes before making your purchase
- INHIBITS CORROSION -- Durable aluminized-steel construction to inhibit corrosion and promote performance
- EASY TO INSTALL -- Manufactured with precision bends and OE-style routings, hangers and connectors for easy installation (where applicable)
- OE-STYLE PERFORMANCE -- Direct-fit design is fixture checked to ensure a precise fit that performs like original equipment
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