Last post on Nov 28, 2013 at 5:49 PM
You are in the Chevrolet Suburban & Tahoe
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Chevrolet Suburban, GMC Suburban, SUV
#624 of 1043 Need HELP ! 2006 8.1 Engine
May 07, 2006 (8:31 am)
Is there an experienced "certified" Chevy mechanic that can help me? I have a brand new 2006 Suburban 8.1 engine which at first start of the day after running for 30 seconds develops a light knock for about 30 more seconds. It seems like it may be comming from the passenger side. I first heard it at about 000,750 miles. It now has 001,650 and happens every time at first start of day. Is there some way to isolate, or/and determine if it is upper or lower?
May 10, 2006 (4:19 am)
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#626 of 1043 Re: Suburban Vibration/Droning Noise [mekenni]
May 10, 2006 (11:39 am)
I have exact the same problem with my O4 Suburban: vibrates at idle (stop signs, lights etc). Also there is noise when under load at about 1.8 RPM. It looks like exactly what you are talking about. Any info on the bulletin about the "flex joint"?
#627 of 1043 Re: Suburban Vibration/Droning Noise [ncddog]
May 11, 2006 (6:05 am)
Wow, you have to love the inernet. I have been having the same "droning" noise, and it's driving me nuts. I am quite enthused to have found a possible solution. Just had the truck at the dealer, who was not able to offer a solution. Do you have any other information on what was replaced? or the bulletin number? The dealer had shown me a bulletin, but it did not say anything about the flex joint. I would prefer the dealer to replace since I just bought the vehicle from them...a 2004 Suburban with 28k mi.
#628 of 1043 Re: Suburban Vibration/Droning Noise [durtis]
May 11, 2006 (5:25 pm)
I have the same exact problem. 2004 Suburban LT. From the day I brought it home, Vibration/Droning when at a light, idling, or when in reverse. Maddening! I had to file the lemon law to get the dealer to change the flex joint. But it hasn't helped. What are we to do?
#630 of 1043 Re: Suburban Vibration/Droning Noise [mekenni]
May 12, 2006 (9:52 am)
I found another thread on the issue on another site but I can not post a link to it here.
From what I understand this problem is O4 Suburban/Tahoe/etc specific. I had an 03 Suburban with no problems like that. It looks like the only confirmed solution is "exauhst dampener". Any info on that would be greatly appreciated. Part#, TSB# etc ....
Also .. all of you 04 owners. I do not like sound from right hand side engine compartment at acceleration (or undr load) at around 1.8K RPM. Any similar problems?
#631 of 1043 How do I calibrate a compass rear view mirror of a 1998 chevrolet suburban?
May 13, 2006 (4:04 pm)
How do I calibrate a compass rear view mirror of a 1998 chevrolet suburban?
I know to hold the compass button down until i have to pick a zone, but I have no clue as to the zone i am in while in miami, FL. then I have to complete 3 circles/// I believe,
Anybody know or have a map ofthe different zones in the US?
#632 of 1043 NEW info found on 8.1 knocking noises
May 14, 2006 (12:19 pm)
Message #624 re: (knocking) New info on 8.1 is that there is a class action lawsuit in progress out of San Francisco against GM for "piston slap" which includes engines from 1999 thru 2003 4 to 8 cylinder engines including 8.1 s. Looks like sales people, knew or should have known about this condition causing a knocking sound at start up. Perhaps like when medications are advertized they at least should make a prospective buyer aware of possible side effects i.e. noise. The slap apparently is caused by a little to much clearance between piston and cylinder. (To much clearance will never become less or better and not likely any quieter or safer. There is no doubt in my mind the "service mgrs/directors" are aware of this complaint and have just plain LIED to me. I guess GM thinks they are so big we don't matter but the fact is we do not have to buy GM. The Japanese do not treat customers this way and their quality and reputation for long lasting vehicles is well known. GM is and has been in denial for way to long. I have been able to isolate the knocking to only ONE cylinder since posting original message. ONE of eight knocking is not "normal" as Chevy has stated to me. GM should be careful what they say as it eventually will come to what did they know and when did they know it. When you sell a product knowing it might very well fail and do not disclose this fact is it fraud. ???? We will see. I will keep this board up to date.
#633 of 1043 Re: Suburban Vibration/Droning Noise [mekenni]
May 16, 2006 (5:07 am)
I had read another post where the flex joint did the trick, I was hoping that was the fix. I also have an 04 LT, love the truck, hate the vibration. Honestly it's enough to make me sell the truck, driving me crazy. I just got off the phone with the dealer, they offered to take another look, and possibly change the flex joint. They did explain that GM does not have a fix, and they would be eating the cost. I have only had the truck a couple months now, and bought it as GM Certified. I work for a tier one supplier to GM for exhaust and ride control products. I have asked my R&D guys what it could be, I will let you know if I find anything out. The dealer did adjust the motor mounts last time I was in there at GM's suggestion. The noise did not away, but changed to a solid constant noise, and did not rise and fall as before...that leads me to think it might be engine vibration isolation issues.