Issues after Recall 2014 5.3l Z71 4x4

[DtotheC]

First post here on this Forum. Seems to have a lot of good info... so anywanys, here is my history and my problem:

bought a '14 Z71 4x4 on dec30 2013

5.3l cab+

 

Used onstar the day the recall hit the news, they said I do not have a recall on my particular truck

 

2 days later I got my recall email saying to bring it in

 

 

I have been in the auto industry for nearly 10 years in the R&D field, working with the big 3 and now have been reloctaed to Mid Ohio to do some aerodynamic/rolling resistance and also heat resistance/thermal stuff with honda... I have been around new technology and have seen alot of stuff.

 

My Z71 started to sound a little loud to me coming from the wheel well at idle. this was really noticible if I was at a drive thorugh or in a traffic jam along a curb or wall. Nothing to loud, just sounded a little off to me. I know direct injection can be really loud, and I can hear that, but is almost sounded like exhaust noise... Didnt notice this when I test drove the vehicle.

 

Took my truck in Wednesday the 22nd for the recall. they reflashed the ECU and sent me on my way. they said the did not hear anything out of the norm coming from the exhaust. I thought the calibration change may have helped.

 

I have noticed the past few days driving to and from work that I am now getting a slight buzz/vibration feeling in my steering wheel. I thought I was crazy, but i have noticed it today again. the truck almost sounds a little deeper exhaust tone now too. this vibtration is most felt at idle. i know it wasnt there before the calibration change, because I commented on how smooth the trucck ran and how disconnected the driver feels from the road. (you tend to get no feeback with electric power steering on what your wheels are doing, the steering wheel just turns smooth and free).

 

Has anyone esle noticed a exhaust note change and a vibration in the steering wheel after the calibration?

Does anyeone know what exactly the new calibration changed?

 

the little bit of diggin I did into the recall came up with that Chevy had the trucks running on 2 cyl at idle to conserve fuel. something was wrong in the cal that would only fire 2 but fuel more cyls than that. anyone who knows about cars and thermal properties know that when an excessive amount of fuel ran through a engine and put onto a cat at operating temps cause problems and cat temps to spike... causing underbody to melt/fire. not sure if this is true, but any input would be nice.

 

maybe I am paranoid since this is my first NEW vehicle. but the vibration makes the truck feel like a old vehicle...

 

[fondupot]

 

the little bit of diggin I did into the recall came up with that Chevy had the trucks running on 2 cyl at idle to conserve fuel. something was wrong in the cal that would only fire 2 but fuel more cyls than that. anyone who knows about cars and thermal properties know that when an excessive amount of fuel ran through a engine and put onto a cat at operating temps cause problems and cat temps to spike... causing underbody to melt/fire. not sure if this is true, but any input would be nice.

 

 

 

No. The trucks never idled on 2 cylinders. That was a rumor started on some bs auto blog.

 

 

And direct injection motors are notoriously loud.

 

 

Sent from my iPad using Tapatalk

Edited January 24, 2014 by fondupot

[fondupot]

 

 

 

This is wrong. Sure, first generation DI engines in the late 90's were loud but a properly functioning modern DI engine is no louder than a fuel injected engine. If your DI engine is making loud noises, it is broken and in need of repair.

 

Every GM DI engine ticks. This is what the op is hearing. And a lot of people aren't used to this because they were used to regular fuel injection, which doesn't tick. Go listen to every ecotec3 motor on a dealer lot and tell me they don't tick at idle.

 

 

Sent from my iPad using Tapatalk

[BringTheRain403]

I noticed a vibration today when I started my truck. It was coming from the blower motor. It was vibrating my steering wheel and my brake pedals and it sounded like an old prop plane. My dealership said they found a bulletin out there about the noisy blower motor and they are going to look at it on Monday. It's definitely the blower motor since it gets louder and quieter as the fan speed increases and decreases. It's also more noticeable when the truck isn't moving...

Edited January 24, 2014 by BringTheRain403

[DtotheC]

This is wrong. Sure, first generation DI engines in the late 90's were loud but a properly functioning modern DI engine is no louder than a fuel injected engine. If your DI engine is making loud noises, it is broken and in need of repair.

Not the case at all. Go listen to a ecoboost 3.5, or new Honda with direct inject... Very loud and different sounding. I can hear the direct inject noise, that's not the noise I am talking about. It's on top of that noise

[DtotheC]

I noticed a vibration today when I started my truck. It was coming from the blower motor. It was vibrating my steering wheel and my brake pedals and it sounded like an old prop plane. My dealership said they found a bulletin out there about the noisy blower motor and they are going to look at it on Monday. It's definitely the blower motor since it gets louder and quieter as the fan speed increases and decreases. It's also more noticeable when the truck isn't moving...

I tried with the blower off this morning but it was - 9F here so I didn't leave it off long. I will try tonight and see if it helps. Thanks for the input

[LTZ2014]

I noticed a vibration today when I started my truck. It was coming from the blower motor. It was vibrating my steering wheel and my brake pedals and it sounded like an old prop plane. My dealership said they found a bulletin out there about the noisy blower motor and they are going to look at it on Monday. It's definitely the blower motor since it gets louder and quieter as the fan speed increases and decreases. It's also more noticeable when the truck isn't moving...

 

Same thing happened to mine on a real cold day. Make an apt at the dealership and the next day it was fine I canceled my apt and it's been fine ever since.

 

 

Sent from my iPhone 5 using Tapatalk

[BringTheRain403]

I took it in and made them listen to it today. I work 5 minutes from the dealership so I just ran it over. I didn't want to risk having it go away and then they don't hear it...

 

Sent from my SCH-I535 using Tapatalk 2

 

 

[LOCALOUTLAW]

First post here on this Forum. Seems to have a lot of good info... so anywanys, here is my history and my problem:

bought a '14 Z71 4x4 on dec30 2013

5.3l cab+

 

Used onstar the day the recall hit the news, they said I do not have a recall on my particular truck

 

2 days later I got my recall email saying to bring it in

 

 

I have been in the auto industry for nearly 10 years in the R&D field, working with the big 3 and now have been reloctaed to Mid Ohio to do some aerodynamic/rolling resistance and also heat resistance/thermal stuff with honda... I have been around new technology and have seen alot of stuff.

 

My Z71 started to sound a little loud to me coming from the wheel well at idle. this was really noticible if I was at a drive thorugh or in a traffic jam along a curb or wall. Nothing to loud, just sounded a little off to me. I know direct injection can be really loud, and I can hear that, but is almost sounded like exhaust noise... Didnt notice this when I test drove the vehicle.

 

Took my truck in Wednesday the 22nd for the recall. they reflashed the ECU and sent me on my way. they said the did not hear anything out of the norm coming from the exhaust. I thought the calibration change may have helped.

 

I have noticed the past few days driving to and from work that I am now getting a slight buzz/vibration feeling in my steering wheel. I thought I was crazy, but i have noticed it today again. the truck almost sounds a little deeper exhaust tone now too. this vibtration is most felt at idle. i know it wasnt there before the calibration change, because I commented on how smooth the trucck ran and how disconnected the driver feels from the road. (you tend to get no feeback with electric power steering on what your wheels are doing, the steering wheel just turns smooth and free).

 

Has anyone esle noticed a exhaust note change and a vibration in the steering wheel after the calibration?

Does anyeone know what exactly the new calibration changed?

 

the little bit of diggin I did into the recall came up with that Chevy had the trucks running on 2 cyl at idle to conserve fuel. something was wrong in the cal that would only fire 2 but fuel more cyls than that. anyone who knows about cars and thermal properties know that when an excessive amount of fuel ran through a engine and put onto a cat at operating temps cause problems and cat temps to spike... causing underbody to melt/fire. not sure if this is true, but any input would be nice.

 

maybe I am paranoid since this is my first NEW vehicle. but the vibration makes the truck feel like a old vehicle...

 

My exhaust sound louder in the cab also after the reflash. It runs fine so I'm not worried about it. I would assume the VVT has been adjusted. Also the fuel mixture has been richened at idle to keep the exhaust running cooler.

Edited January 24, 2014 by LOCALOUTLAW

[TxTruckMan]

This is wrong. Sure, first generation DI engines in the late 90's were loud but a properly functioning modern DI engine is no louder than a fuel injected engine. If your DI engine is making loud noises, it is broken and in need of repair.

Why do you constantly come into these threads and post completely wrong information like you have a clue about what you're saying? It's like you're constantly trying to stir things up and get people upset or concerned about non-issues. Do you ever have ANYTHING positive to say?

[GMC-AT]

I been trying to tell you guys for year that he is paid blogger probably working for Ford. Their only job is to post negative things on competitors forums. Don't think for a second guys like him aren't out there...

Edited January 24, 2014 by GMC-AT

[TxTruckMan]

This forum needs an ignore feature for people like him - or an anti-troll clause.

[GMCustomerService]

Hi DtotheC,

 

Welcome to the forum! I’m glad to hear that you have taken your vehicle to the dealership regarding the open recall you had on it. I understand that you are now experiencing some vibrations in the steering wheel while driving. I would like to take a further look into your concern. Can you please private message me your VIN so that I can reach out to an internal resource? Thank you.

 

Kristen A.

GM Customer Care

[Bikewhisperer]

This forum needs an ignore feature for people like him - or an anti-troll clause.

There is an area where you can control your ignore preferences if you click on your name on the top right of the screen. I've never used it but it seems to have an spot to enter user names to ignore.

[mzodarg]

Why do you constantly come into these threads and post completely wrong information like you have a clue about what you're saying? It's like you're constantly trying to stir things up and get people upset or concerned about non-issues. Do you ever have ANYTHING positive to say?

He's been trolling a long time with over 2000 posts, non of which were worth reading IMO.