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Recall (Catalytic Converters/H Pipe)

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Old 07-07-2015, 03:17 PM
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BurgundyVette
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Default Recall (Catalytic Converters/H Pipe)

Had the recall done on my 2009 vette, and it seems like it's a little quicker, with a more rumbling sound. Service rep said cost out of pocket would be almost $3200 with the warranty. GET IT DONE!
You will tell the difference. Some members were saying, they were cuttting back on the horsepower. Bull*&%$!
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Old 07-07-2015, 05:36 PM
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boraxman
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I have heard mixed reviews...I know its mandatory in Ca.

08's are next on this recall/
Old 07-07-2015, 08:25 PM
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spuddeamore
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I'll wait for more feedback...I personally don't see that going from two cats to four is going provide a louder exhaust. I also think a factory ECM reflash isn't done for more HP reasons, but that's just me. Time will shake these issues down eventuality for us all. Enjoy your ride and stay safe, escaped Chi-town 10 years ago.
Old 07-07-2015, 11:25 PM
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Originally Posted by boraxman
I have heard mixed reviews...I know its mandatory in Ca.

08's are next on this recall/
I wonder if the mixed reviews has to do with some cars had clogged cats, thus the recall?
Old 07-07-2015, 11:44 PM
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Dif
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Originally Posted by BurgundyVette
Had the recall done on my 2009 vette, and it seems like it's a little quicker, with a more rumbling sound. Service rep said cost out of pocket would be almost $3200 with the warranty. GET IT DONE!
You will tell the difference. Some members were saying, they were cuttting back on the horsepower. Bull*&%$!
there have been mixed reviews but I also had it done and mine also runs better.
Slightly quicker at the bottom end into the mid range and much smoother and responsive.
My exhaust is not louder though, it's slightly more muffled
It's being done to the 2009's that are designated California compliant regardless of whether it's in Cali or not.
They Replace the 2 Original Cats and Add 2 more Smaller Cats under the tunnel along with a Flow through X-Pipe aft of the 2 Smaller Cats.
It's the same setup the 2012's have from the Factory.
The X-Pipe along with the ECM Flash to compensate for the Added Cats is most likely what is helping the car run better albeit slightly quieter.
I gained about 2 more MPG since the recall was done
Just my 2 cents
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Old 07-08-2015, 02:19 AM
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Jcbarr25
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does anyone know or maybe can guess why the 2010/2011 did not get recalled?? I mean whats the difference between 08/09 and 10/11?? they all don't have the extra set of cats that 2012 and up cars do.
Old 07-11-2015, 11:33 AM
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Originally Posted by spuddeamore
I'll wait for more feedback...I personally don't see that going from two cats to four is going provide a louder exhaust. I also think a factory ECM reflash isn't done for more HP reasons, but that's just me. Time will shake these issues down eventuality for us all. Enjoy your ride and stay safe, escaped Chi-town 10 years ago.
Originally Posted by Jcbarr25
does anyone know or maybe can guess why the 2010/2011 did not get recalled?? I mean whats the difference between 08/09 and 10/11?? they all don't have the extra set of cats that 2012 and up cars do.
Others have asked the same questions and so far, unless I missed it nobody seems to know.
Like anything else when something like this happens, a lot of times it's anyone's guess.
For anyone that missed it, here's the Sticky ( Merged ) for all the Recall threads.
https://www.corvetteforum.com/forums...6s-merged.html

And, at the risk of being redundant since I already posted .....
now with 500 miles on since having the Cats Emissions recall done, my 09 is running Great.
Definitely a Noticeable Improvement in the way it runs and I can Confirm the mileage increase.
The exhaust is also louder compared to how it sounded immediately after getting the work done.
Another Noticeable thing is Coolant Temps are running 5 - 8 degrees cooler depending on weather temps and driving situations.
Just another update for what it's worth

Last edited by Dif; 07-11-2015 at 01:41 PM.
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Old 09-19-2015, 09:25 AM
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This recall is for 2008 and 2009 LS3 models with California Emissions RPO code NU5. This affects cars in CALIFORNIA, CONNECTICUT, DELAWARE, MARYLAND, MASSACHUSETTS, MAINE, OREGON, VERMONT, & WASHINGTON ONLY.

The procedure involves a PCM reflash and converters.

Due to part availability, this recall will be released in phases. The first phase will cover the 2009 model year vehicles. Dealers will be notified when sufficient parts are available to begin repairs on 2008 model year vehicles.

CONDITION

General Motors has decided to conduct a Voluntary Emissions Recall involving certain 2008-2009 model year Chevrolet Corvette vehicles, equipped with a 6.2L engine (LS3) and California Emission System (NU5). The vehicles may be emitting air pollutants in excess of the California vehicle emission standards.

CORRECTION

Dealers are to reprogram the engine control module and replace the catalytic converters.

VEHICLES INVOLVED

All involved vehicles are identified by Vehicle Identification Number on the Investigate Vehicle History screen in GM Global Warranty Management system. Dealership service personnel should always check this site to confirm vehicle involvement prior to beginning any required inspections and/or repairs. It is important to routinely use this tool to verify eligibility because not all similar vehicles may be involved regardless of description or option content.

For dealers with involved vehicles, a listing with involved vehicles containing the complete vehicle identification number, customer name, and address information has been prepared and will be provided to US dealers through the GM GlobalConnect Recall Reports. Dealers will not have a report available if they have no involved vehicles currently assigned.

The listing may contain customer names and addresses obtained from Motor Vehicle Registration Records. The use of such motor vehicle registration data for any purpose other than follow-up necessary to complete this recall is a violation of law in several states/provinces/countries. Accordingly, you are urged to limit the use of this report to the follow-up necessary to complete this recall.

PARTS INFORMATION

Parts required to complete this recall are to be obtained from General Motors Customer Care and Aftersales (GMCC&A). Please refer to your “involved vehicles listing” before ordering parts. Normal orders should be placed on a DRO = Daily Replenishment Order. In an emergency situation, parts should be ordered on a CSO = Customer Special Order.

Part Number

Description

Quantity/Vehicle

25958404

Pipe, Catalytic Converter (Left)

1

25958405

Pipe, Catalytic Converter (Right)

1

25958410

Pipe (Underbody Converters, 2009 Only)

1

21992620

Gasket, Exhaust Manifold Pipe

2

12555555

Seal, Exhaust Manifold Pipe

2

SERVICE PROCEDURE

Note: Install the new intermediate pipe with the new underfloor converters.

Reprogram the engine control module. Refer to K20 Engine Control Module: Programming and Setup in SI.
Remove the left and right catalytic converter. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side in SI.
Install a new left and right catalytic converter. Refer to Catalytic Converter Replacement - Left Side and Catalytic Converter Replacement - Right Side in SI.
CALIFORNIA, CONNECTICUT, DELAWARE, MARYLAND, MASSACHUSETTS, MAINE, OREGON, VERMONT, & WASHINGTON VEHICLES ONLY: Install a Recall Identification Label. Also, for California vehicles complete a “Proof of Correction” certificate upon recall completion.

RECALL ID LABEL

Place a Recall Identification Label on each vehicle corrected in accordance with the instructions outlined in this Product Recall Bulletin. Each label provides a space to include the recall number and the five-digit dealer code of the dealer performing the recall service. This information may be inserted with a ballpoint pen.

Put the Recall Identification Label on a clean and dry surface of the radiator core support in an area that will be visible to people servicing the vehicle.

When installing the Recall Identification Label, be sure to pull the tab to allow adhesion of the clear protective covering. Additional Recall Identification Labels for US dealers can be obtained from Dealer Support Materials by ordering on the web from DWD Store, www.gmglobalconnect.com, and then click on the DWD Store link. Request Item Number S-1015 when ordering.

WARRANTY INFORMATION

Submit a transaction using the table below. All transactions should be submitted as a ZFAT transaction type, unless noted otherwise.

Labor Code

Description

Labor Time

9101261

Replace Catalytic Converters and Reprogram ECM

1.8

CUSTOMER INFORMATION

General Motors will notify customers of this recall on their vehicle (see copy of customer letter included with this bulletin).

In order to ensure full protection under the emission warranty, and the right to participate in future recalls, the customer notification letter recommends tha t customers have their vehicles serviced as soon as possible. It also advises that failure to do so could legally be determined to be lack of proper maintenance. The vehicle may fail a state or local emission inspection test if the recall work is not completed.

DEALER RESPOSIBILITY

All unsold new vehicles in dealers' possession and subject to this recall must be held and inspected/repaired per the service procedure of this recall bulletin before customers take possession of these vehicles.

Dealers are to service all vehicles subject to this recall at no charge to customers, regardless of mileage, age of vehicle, or ownership, from this time forward.

Customers who have recently purchased vehicles sold from your vehicle inventory, and for which there is no customer information indicated on the dealer listing, are to be contacted by the dealer. Arrangements are to be made to make the required correction according to the instructions contained in this bulletin. A copy of the customer letter is provided in this bulletin for your use in contacting customers. Recall follow-up cards should not be used for this purpose, since the customer may not as yet have received the notification letter.

In summary, whenever a vehicle subject to this recall enters your vehicle inventory, or is in your dealership for service in the future, you must take the steps necessary to be sure the recall correction has been made before selling or releasing the vehicle.

When a California emissions recall is completed by a GM dealer, the dealer must provide the vehicle owner a “Proof of Correction Certificate” which the owner may need to present to the California Department Of Motor Vehicles (DMV) when renewing their vehicle registration. Without this correction certificate, the owner may be unable to renew their vehicle registration.

Additional Certificates can be obtained, at no charge, from Dealer Support Materials by ordering on the web from the DWD Store, www.gmdealerworld.com, and then click on the DWD Store link; request GM Item Number 1825 when ordering.



Dear General Motors Customer:

This notice is sent to inform you that General Motors is conducting a voluntary emission recall that includes your vehicle.

Reason For This Recall: General Motors has decided to conduct a Voluntary Emissions Recall involving certain 2008-2009 model year Chevrolet Corvette vehicles, equipped with a 6.2L engine and California Emission System. The vehicles may be emitting air pollutants in excess of the California vehicle emission standards.

What Will Be Done: Your GM dealer will reprogram the engine control module and replace the catalytic converters. This service will be performed for you at no charge.

What You Should Do: Please contact your GM dealer as soon as possible to arrange a service date and to assure parts availability. Instructions for making this correction have been sent to your dealer. Please ask your dealer if you wish to know how much time will be needed to schedule, process, and repair your vehicle.

If you have any questions or need any assistance, just contact your dealer or the Chevrolet Customer Assistance Center at 1-800-222-1020 or 1-800-833-2438 (TTY).

Emission Law Information: In order to ensure your full protection under the emission warranty made applicable to your vehicle by state and federal law, and your right to participate in future recalls, it is recommended that you have your vehicle serviced as soon as possible. Failure to do so could legally be determined to be lack of proper maintenance of your vehicle. Also, your vehicle may fail a state or local emission inspection if this recall is not accomplished.

IMPORTANT MESSAGE FOR CALIFORNIA RESIDENTS

The California Air Resources Board (CARB) requires vehicle emission recalls be completed prior to California registration renewal. Uncorrected emission recalls will result in the inability to renew your California vehicle registration.

At the time of emission recall completion, your California dealer will issue a "Proof of Correction Certificate". Keep this certificate and, if required, present it to the Department of Motor Vehicles when renewing your California registration as proof of recall completion.
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Old 09-19-2015, 10:14 AM
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I have NE1 emissions code and just received my recall letter. I thought when I read that letter that I was safe, not the case.


DJ
Old 09-19-2015, 11:32 AM
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I received my letter about a week ago. I have '08, and live in Rhode Island. I was thinking about this warranty but was afraid there would be power reduction (assuming they are using more restrictive cats).

I'm still on the fence with this, especially as I have had my ECM tuned by local guru.

Anyway, I will follow this thread and read more postings. It's interesting to hear some reporting MORE felt power. I would never have expected that result.....

Here's a thought - if anyone has access to dyno, do a before and after test.
Old 09-19-2015, 12:35 PM
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Originally Posted by BurgundyVette
Had the recall done on my 2009 vette, and it seems like it's a little quicker, with a more rumbling sound. Service rep said cost out of pocket would be almost $3200 with the warranty. GET IT DONE!
You will tell the difference. Some members were saying, they were cuttting back on the horsepower. Bull*&%$!
Seat of pants dyno...
Placebo..
Less free flowing exhaust = less hp
Old 09-19-2015, 12:40 PM
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Default Safe?

The recall is safe. If you live in California and you've had a tune, this recall will be very disheartening for you. The recall will re-tune your car and whatever you paid for the performance tune is down the toilet. If you don't do the recall and you live in California, 2016 is the last year you can "legally" register your car. You will have to use the "back-Street" method for a smog certificate.

GM is not issuing performance CATs so there is no performance gain or loss. Those who experience any type of performance gain should send GM a box of candy for Christmas because this means your CAT was bad and you didn't know it and now you have a good one and enjoying your car.

If you have a 2008 LS3 with only two CATs (left and Right), they will not be installing under-body CATs on your car. Under-body CATs are for 2009 only. See my previous post. (25958410 Pipe (Underbody Converters, 2009 Only)


But most people are probably like me. I had my 2008 LS3 smogged September 9th, 2015 and my CATS are performing perfectly. 09/17/15, I received the recall. I don't need GM's new CATs but my "smog guy" says I have to get them to continue registering my car.

So, i'm scheduled for the recall installation on October 5th. If I notice any issues, performance or otherwise, I will let you guys know.

Last edited by MrMagic; 09-19-2015 at 12:58 PM.
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Old 09-19-2015, 05:15 PM
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djbrun
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Originally Posted by MrMagic
The recall is safe. If you live in California and you've had a tune, this recall will be very disheartening for you. The recall will re-tune your car and whatever you paid for the performance tune is down the toilet. If you don't do the recall and you live in California, 2016 is the last year you can "legally" register your car. You will have to use the "back-Street" method for a smog certificate.

GM is not issuing performance CATs so there is no performance gain or loss. Those who experience any type of performance gain should send GM a box of candy for Christmas because this means your CAT was bad and you didn't know it and now you have a good one and enjoying your car.

If you have a 2008 LS3 with only two CATs (left and Right), they will not be installing under-body CATs on your car. Under-body CATs are for 2009 only. See my previous post. (25958410 Pipe (Underbody Converters, 2009 Only)


But most people are probably like me. I had my 2008 LS3 smogged September 9th, 2015 and my CATS are performing perfectly. 09/17/15, I received the recall. I don't need GM's new CATs but my "smog guy" says I have to get them to continue registering my car.

So, i'm scheduled for the recall installation on October 5th. If I notice any issues, performance or otherwise, I will let you guys know.
Local dealer confirmed that the 08' model year are now getting 4 cats as well. So, please let me know what you get.

Thanks,

DJ
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Old 09-19-2015, 05:41 PM
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California, go figure
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Old 09-19-2015, 06:03 PM
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Cats? What's that?

Thank god I got rid of those lol
Old 09-19-2015, 06:21 PM
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Received the letter yesterday for my '08, so I'll be getting the new cats and an oil change in the next few weeks.
Old 09-19-2015, 09:13 PM
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Second on the 08 getting a new x pipe with additional smaller cats, now it will have 4 cats.

My kit has been ordered and is in stock.

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Old 09-20-2015, 04:36 PM
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2012 and 2013 came stock with 4 cats. Two monitored and two unmonitored...I promptly removed the extra two unmonitored cats...( live in Texas)...

The HP rating for 2012/2013 were the same as previous years with only two cats, so I am guessing they tuned the car more aggressively to accommodate for the two extra green tree hugger restrictions...Perhaps they are just sticking you guys with the same tune....

Originally Posted by MrMagic
GM is not issuing performance CATs so there is no performance gain or loss. Those who experience any type of performance gain should send GM a box of candy for Christmas because this means your CAT was bad and you didn't know it and now you have a good one and enjoying your car.
Hmmm...my understanding of catalytic converters is that they typically last the life of the car, and if they are clogged or running below standard your ECU/ECM would throw a code up...so the probability is no one had a bad cat. The performance gain is either seat of pants/placebo ( like a intake) or GM is tuning the car more aggressively to accommodate for the restrictions. The driver than thinks due to these changes that his car has improved...again also placebo....or maybe I am wrong the tune is actually an improvement. But bad cats vs good cats and an improvement?...low probability of that... so dont send em any candy.

Last edited by Cor430vette; 09-20-2015 at 04:49 PM.
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Old 09-20-2015, 04:46 PM
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So the 2011 has 2 fewer cats huh? Good to know that
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Old 09-21-2015, 10:24 AM
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Four cats don't necessarily mean more restriction than two cats. It all depends on how restrictive each one is. the fact that they are replacing the existing ones and not just adding additional cats give me hope.

I'm getting my recall done this morning, Mine is a very early 2008. I'll count the cats.
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