Question about 2003 GMC Sierra 2500HD

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2003 GMC SIERRA 2500HD

RATTLING SOUND COMING FROM TRANSFER CASE, NOISE STOPS WHEN BRAKES ARE APPLIED

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  • dgault Apr 19, 2009

    like a grinding noise when i back up but goes away when the brakes are applied. Make a real squealing noise when u let off the accelarator but stops when u go again

  • Anonymous Mar 16, 2014

    There is a lot of rattle in the front end, as well as squeeks and groans coming from up front. The car also pulses as you apply the brakes and come to a full stop.

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I have the same issue...what's the fix?

Posted on Oct 01, 2008

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Does anyone know of a website i can get a diagram of my 03 2500hd's tranny and transfer case, cant figure out where my atf leak is coming from.


LEAK AT TRANSFER CASE COMING FROM DIFFERENTIAL PINION SEAL OR THE TRANSFER CASE SEAL LEAKING.YOU CAN GO ON LINE TO ON LINE AUTO REPAIR MANUAL ON AUTO DATA MANUALS YOU SHOULD BE ABLE TO FIND TRANSFER CASE DIAGRAM BUT YOU HAVE TO PAY TO USE SITE FOR 3 TO 6 MONTHS.

May 05, 2011 | 2003 GMC Sierra 2500HD

1 Answer

Elctronic engage 4 hi clunk noise in trans fer casae chain problem or gears


If you know for sure it's coming from the case, then gears. I would check all the universal joints on the drive shafts first

Jan 23, 2011 | 2003 GMC Sierra 2500HD

1 Answer

My 05 Chevy 2500HD is making a grinding noise when decelerating, as in going down a hill. When applying pressure to the accelerator it stops. It sounds like its coming from the rear bottom.


It is the transfer case. It seems to be a big problem with the 2004 and 2005 models. They are not synchronized and bend the forks alot. The noise you hear is the chain rolling off the gear. Mine only did it when I was going over 45 downhill and not on the throttle for a few seconds. Hope this helps...

Apr 07, 2010 | 2003 GMC Sierra 2500HD

1 Answer

2003 Sierra 2500hd transmission or transfer case making grinding noise (sounds like a bearing going bad) it becomes louder when i give it gas. i checked the fluid in the transfer case which looked ok, i...


Sudden grinding noise with no prior warning * Primarily in 2nd gear, behavior in reverse may be abnormal; sunshell is fractured. R&R. Try not to run or drive the car or further damage could result.

* Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either. R&R sooner rather than later.

* Either a torrington bearing or a planetary bearing is on its way out. Trans will eventually die a loud, catastrophic death. Cheaper to rebuild now (saves further damage to hard parts), but requires R&R. It is drivable until it breaks.

Good luck and thank you for using fixya.

Mar 17, 2010 | 2003 GMC Sierra 2500HD

1 Answer

Noise coming from under 05 Chevy 2500 HD


the parking brake rusts and makes a rubbing sound. it is inside of the rear disks. you have to remove the caliper then the caliper bracket. pull the disk off and inspect the parking brake. very common problemas most automatic trucks no one ever uses the parking brake

Dec 31, 2009 | 2003 GMC Sierra 2500HD

1 Answer

Oil coming out rubber plug on top of transfer case


Unless someone has added fluid lately, check for a small fitting like piece sticking up on top of case that is a vent for case, it may be plugged. Can try air pressure to unclog it, but may have to take it out & clean with solvent.

Aug 09, 2009 | 2003 GMC Sierra 2500HD

2 Answers

Switching in to 4wd on the fly get a loud clunk and some grinding


Yeah i get the same thing when im hitting the whoops at 80 miles an hour.What is the deal with this.

Jan 21, 2009 | 2003 GMC Sierra 2500HD

3 Answers

4X4 inop on 2003 GMC Sierra 2500HD


I have found that when you are going to engauge 4x4 high, it is best to only be going about 3 miles an hour. Not faster, not stopped. It likes some movement to help it mesh. I've had perfect shifts since I started this. Hope it helps. Wade.

Jan 09, 2009 | 2003 GMC Sierra 2500HD

1 Answer

2002 gmc 2500hd 4wd abs problems


the problem is most likely a wheel speed sensor at one of the front wheels. retrieving a code in the abs system could pinpoint which wheel it is. i believe the wheel speed sensor is part of the bolt on front wheel bearing assy. if you plan on doing this yourself and are mechanically inclined. you will need an a/c volt meter to check sensors. let me know if i can assist further.

Dec 04, 2008 | 2003 GMC Sierra 2500HD

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