2014 2500hd four wheel drive question

jbshoo · January 21, 2014

So, this truck is new to me, coming from a awd denali 1500. Roads were a little slick tonight, so stopped the truck, flipped the switch to 4wd high, seems like all four are engaged, but get a wining noise when I let off the accelerator, is this normal? Called and local dealer and they said yes it's normal but sound petty odd to me. Any help or info would be appreciated.

Thanks.

Jeff

scooby5121 · January 22, 2014

You can switch to 4H while at highway speeds as long as they are slippery or snow covered preferably.

Or driving in a straight line when dry is ok too.

You only have to stop when the 4 Low is engaged and the computer is smart enough that there are enough safeties so 4 low will not accidentally engage while moving.

Now answer to original ?

Normal whine noise with additional road surface noise attributes to a 4X4 truck with only one of the front wheels engaged unless( you specially built a locker front end)

jbshoo · January 22, 2014

So, I just took this out for a ride, snow covered roads, engaged 4x while in park, shifted to drive and away I went, all was quite until I took my foot off the accelerator, then a high wind/ grone noise from the right front. Hit the accelerator and noise goes away. Sounds time like something is not right. Truck only has 700 miles on it, first time in 4x since new.

gmtech4 · January 22, 2014

road test with the shop foreman,,,if he says its normal ,,,,,ask to get an exact truck off the lot and go out again with him !!!!

take no shit ,,,,tell him Rob said !!!! lol

your front diff MAY be not set up right

MORSNO · January 22, 2014

road test with the shop foreman,,,if he says its normal ,,,,,ask to get an exact truck off the lot and go out again with him !!!!

take no shit ,,,,tell him Rob said !!!! lol

your front diff MAY be not set up right

Do what govtech4 recommended. It sounds like your front differential is not set up right (backlash between ring and pinion). That could cost you big money the day after your warranty runs out!

barky · January 22, 2014

Yea ditto above. Even with all the problems my truck has I will say the 4WD is very quiet. Be polite, but strident and get it done right.

GMCustomerService · January 22, 2014

Hello Jeff S,

I’m sorry to hear that you are experiencing this problem with your 4WD in your vehicle. I will be happy to look into your concern. If you would like my assistance, please private message me your full name, VIN, current mileage, and preferred dealership. Thank you.

Kristen A.

GM Customer Care

jbshoo · January 23, 2014

Sent email thank you.

jbshoo · January 25, 2014

So here's the response from GM.. Not pleased as a long time GM customer...

GM Customer Service

Verified GM Employee

Member

734 posts

Gender:Not Telling

Sent Today, 02:06 PM

Hello Jeff,

Please accept my apologies for my delayed response! I am sorry to hear of the concern you are having with the clicking noise when you put your truck in 4wd. I can definitely understand your frustration with the noise. However, after further research I do see that our engineers have deemed this "normal" for trucks to make this sound. At this time, there is no fix for this as it is not a defect. I understand this may not be the answer you wanted to hear. If you have any further questions or concerns, please do not hesitate to reach out to me.

Thank you,

Andraya R.

GM Customer Care

>>>>>> Please check out the new GM Owner Center at https://my.gm.com/ for more vehicle information!

Reply

Report

Here's my response..

Enthusiast

Member

15 posts

0 warning points

Sent Today, 07:43 PM

I find your response to be unacceptable as my neighbor has the same truck and is not making the same noise, base on your response, I assume GM will assume all liability if a catastrophic failure accures

jbshoo · January 25, 2014

Bottom line, this is BS I'm no mechanic, but have driven a lot of gm vehicles, and this sounds like there is a serious problem.

Silverado4x4 · January 25, 2014

Take about 15 minutes and crawl under the truck and check the transfer case fluid level, mine did something like you stated and the fluid was real low, after filling the case till the oil ran out the hole the whine was almost completely gone but you will get some whine in all transfer cases. Mine was about 2 weeks old when I found this but instead of taking it back to the dealer and spending all day there I checked the fluid level first and that was what it was. I had to use a hand pump for oil bottles to get the fluid in there which I already had, mine took about 1/2 to 3/4 of a quart.

MORSNO · January 25, 2014

Take it into your dealer so the mechanics can hear the noise for themselves, how can GM possibly troubleshoot your issue via email?????

GMCustomerService · January 26, 2014

So here's the response from GM.. Not pleased as a long time GM customer...

GM Customer Service

Verified GM Employee

Member

734 posts

Gender:Not Telling

Sent Today, 02:06 PM

Hello Jeff,

Please accept my apologies for my delayed response! I am sorry to hear of the concern you are having with the clicking noise when you put your truck in 4wd. I can definitely understand your frustration with the noise. However, after further research I do see that our engineers have deemed this "normal" for trucks to make this sound. At this time, there is no fix for this as it is not a defect. I understand this may not be the answer you wanted to hear. If you have any further questions or concerns, please do not hesitate to reach out to me.

Thank you,

Andraya R.

GM Customer Care

>>>>>> Please check out the new GM Owner Center at https://my.gm.com/ for more vehicle information!

Reply

Report

Here's my response..

Enthusiast

Member

15 posts

0 warning points

Sent Today, 07:43 PM

I find your response to be unacceptable as my neighbor has the same truck and is not making the same noise, base on your response, I assume GM will assume all liability if a catastrophic failure accures

Hello Jeff S,

I wanted to let you know that I have sent you a private message regarding the next steps that will be taken with your case. Feel free to let me know if you should have any other questions.

Sincerely,

Jonathan A.

GM Customer Care

sdeeter19555 · January 27, 2014

If you ask them, there is a TSB regarding the noise you describe...something about rubber bushings? My 2012 has a noise similar to that noise you desribe.

I did the same thing you did...half way home on a 300 mile trip and got into the snow belt, popped into 4wd...coming from a Dodge that was completely noise free in 4wd, it was unsettling to say the least (it sounds like either the front differential or the front output shaft of the transfercase has a bad bearing). But the dealership DID take me for a ride in two other 2500HD Silverados, and both of them had the noise. The told me that most people don't even acknowledge it, unless they came from something that was quiet and its interpretted as a problem. Mine is mainly noticed at highway speeds, and under coast; and its VERY noticeable.

The fix was issued in early 2013, but an additional TSB was issued that the "fix" was not successful.

Hopefully this adds to your confusion.