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What is this discussion about? GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Truck

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#902 of 1492 Yellowdog by rayt2 Sep 02, 2004 (6:39 am)
I've found when towing it's best to leave it in 3rd gear tow/haul mode to stop up/down erratic shifting when towing. I am towing a 6000 # trailer though not a 17' boat. Obyone's & Noobie's suggestion for a reprogram of trans. computer is also something to have done, I had a reprogram twice under warranty for shift issues. There is probably a TSB issued anyway, but ya gotta word your complaint right or they won't tell ya. The vibration sounds like a holdover issue since the redesign of truck back in 99, some things GM just can't get right.   Ray T.
#903 of 1492 2004 Transmission problems by yellowdog27 Sep 04, 2004 (1:58 am)
Thanks to those who replied to my questions. Got the truck back from the dealer yesterday and much to my surprise, they actually took a great deal of effort in trying to address my problems. The problem that I was having with towing. they think was from a defective electronic clutch fan. I took my boat for a test tow after getting it back and it seems to be ok. Vibration problem they thought was linked to a TSB that GM put out on 8-26 on vibration coming from the exhaust. They placed 4 bushings under the exhaust per GM instructions. While this might fix some costumer complaints it hasn't changed my problem. Still getting vibration/rattle noise at 42 mph when lightly accelerating. Heading out on vacation in the morning for two weeks so I am keeping my fingers crossed that the towing problem is fixed. I will need to return the truck to the dealer when I return for the vibration. This is my 5th full size GMC and I am a bit concerned about the quality of this $38,000 vehicle. 3 trips back to the dealer in the first 2,000 miles is a bit inconvenient!                    Brad
#904 of 1492 Re: 2004 Sierra Transmission Problems [yellowdog27] by mccotton Sep 09, 2004 (11:46 am)
Replying to: yellowdog27 (Aug 27, 2004 7:38 am) I had the same problem with my new Sierra Crew Cab 4wd. I was very disappointed thinking that nothing was really wrong and that was just the way the truck was built. However, I took it in for my 2nd oil change and complained about the same type problems you've experienced. My transmission would whine really loud, especially after idling for extending periods. It would literally drown out the sounds of the muffler and engine. The power loss was huge as well and it would become so frustrating that I would pucnh the pedal all the way down just to get some get up and go.   The transmission specialist said there was nothing wrong with my transmission. However, he did perform some ATC software updates. Now, it's like driving a completely different truck. It now performs like I expected this engine to perform. 90% of the whining is gone now after long idles and hot weather. I would say it solved 95% of my complaint. Next oil change, I'm going to talk with him again to see if I can get that last 5% resolved, possibly with some more fine tuning.   I agree....lots to pay for a trcuk that is not performing optimally. However, once you get it fixed, it'll be like the new truck you expected. Replies to this message: yellowdog27 (Sep 19, 2004 3:14 am)
#905 of 1492 Re: 2004 Sierra Transmission Problems [mccotton] by yellowdog27 Sep 19, 2004 (3:14 am)
Replying to: mccotton (Sep 09, 2004 11:46 am) Thanks for the information, because the truck is still not performing the way it should. Towing my boat all the way from PA. to Maine for vacation the past two weeks, I had to anticipate every little incline in the road so that I could build up speed. Most the time (as you said) I just ended up punching the gas pedal to keep up with the traffic. I will strongly suggest to the dealer when it goes back in the morning to look into the ATC updates and hopefully I will get the same results that you did.
#906 of 1492 Re: 1998 Sierra Steering Problem [charleywb] by pacman Sep 27, 2004 (12:56 pm)
Replying to: charleywb (Apr 20, 2003 7:00 pm) Same truck. Steering sector too tight, needs to be adjusted.
#907 of 1492 1999 Sierra ABS Problems by pojgmcscott Oct 03, 2004 (6:37 pm)
Has anyone had their anti-locks activate (pulsating) under normal braking conditions? Just recently started and only happens when the truck is just shy of a complete stop,every time. Already had the ABS CONTROL MODULE replaced less than a year ago. No ABS/BRAKE light on. Necessary to pump the brake to de-activate. 49k miles.   Scott
#908 of 1492 ABS PULSATING (pojgmcscott) by shiftless Oct 10, 2004 (7:53 am)
Scott: Your problem is probably dirty ABS sensors on your front wheels. Either rust or other contamination on the pick-ups will cause your problem.   Ed
#909 of 1492 Noise when starting cold? by henne Oct 11, 2004 (6:57 pm)
I have a 04 2500hd,6.0, auto. When I start it cold in the morn it makes a whine noise for about 2 or so seconds. You know the noise you hear when you blow into a bottle at an angle, thats what it sounds like. Any Ideas?   Thanks.   Robert
#910 of 1492 Sheel Metal Noise... ROOF? by serra04 Oct 25, 2004 (6:12 pm)
I have a 2004 Sierra Ext. Cab X4, 5300, AT.   The problem is when traveling at Interstate speeds 65 to 70 MPH in gusty wind conditions I can hear what sounds like the sheet metal in my roof popping & buckling. The noise is very noticeable when attempting to overtake OTR truck when you are just beginning to come alongside them and you feel the buffeting from the airflow. I need help, the dealer thinks I'm crazy on this... when he drives it he says its fine and did'nt hear a thing. The problem is that has to be a little windy on the road and it will do it intermittently as wind conditions increase.   Has anyone else had a similar occurance like this? Replies to this message: fishersc (Dec 17, 2004 12:25 pm) weels (May 09, 2005 6:19 pm) baredogg (May 10, 2005 5:38 am) and 1 more... sososierra (Apr 18, 2005 4:09 pm)
#911 of 1492 Serra by ryanbab Oct 25, 2004 (8:10 pm)
Do you have a bug deflector? It could be the black rubber moulding that goes around the windshield. Quick fix put some 3m tape (doublesided) under it Replies to this message: serra04 (Oct 26, 2004 6:33 am)

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