2003 Trans. Clunking

[IHATEMY2500HD!]

Sorry for the million posts. I found this when I did a google search.. maybe this can help someone out w/ the surging while in cruise. This was from a post on edmunds.com .

************************************************** **

#3853 of 4502 Cruise control oddity... by letsgetmikey Jan 30, 2004 (9:09 am)


Reply
I have an O4 Sierra.


When going downhill at interstate highway speeds with the cruise control engaged, I can feel hesitation/surging, like the cruise control unit can't figure out whether to accelerate or not. Feels like a miss in the engine, but it has to be something related to the cruise unit. Doesn't happen without cruise on.


Any thoughts? Probably going to get blank stares from service dept. when I take it in.


Mikey


#3854 of 4502 Mike by rayt2 Jan 30, 2004 (11:16 am)


Reply
Mine acts the same way since new, 2000 LS 2500 X-Cab and 46k. I mentioned once to dealer and you can guess the answer "normal" ! Basically the cruise is trying to maintain the set speed since gearing and roll resistance play a factor it may very well seem like surging and hesitation when it's not, it's coasting and acceleration taking place.


Ray T.


#3855 of 4502 Cruise Control by noobie1 Jan 31, 2004 (12:26 pm)


Reply
If it's "normal", why don't they all do it? Mine doesn't, so I've never studied this problem. But you can envision what would happen if the feedback information (speed sensor) occurred once per second (e.g., your situation) rather than ten times per second (e.g., normal). In the latter case the adjustments would appear transparent. In the former, hesitation. Why it occurs only down hill? Puzzling. Maybe something to do with free play in the drivetrain. Also, the Throttle Position Sensor may be providing faulty information at a particular position (near closed). Lots of possibilities. Software? It would take a smart, dedicated tech to figure it out. Not something you normally find at a Chevy dealership.


-David

[cad]

Hello all.
My 2001 Z71 now has 32000 on it. Same problem with the clunkS I described on page 3 or 4 of this thread.
I have no other complaints about the truck...I have heard about the cold start knock, but mine does not do that....Search on this and you may find an inexpensive thing to try is to use an AC Delco oil filter with your next oil change...I read that some oil filters' bypass valve, or lack of, causes the cold start knock...If your knock is faint and very short during start up, this is one thing to try.
BTW, I did get the letter from GM for the free extended warranty (6yr/75k) on the driveline (minus engine).

As far as the *ssholes that say to turn up the radio, they usually are the ones at the service desk at the Chevy dealer that are driving 1982 Celicas... I worked in parts at a local GM dealer through college and that's a fact!

[Faze2183]

is this only on the 2003s?

[Faze2183]

what is the clunk i have a 2002 chevy z71 looks alot like yours cad but that i know it doesnt have that clunk your talkin about that i know ofs, nor does it have the piston slap

[cad]

See my post on page 3 or 4...I described in pretty good detail.

[Faze2183]

oh ok ya i get that from time to time but i had that on my old truck and it was a 1996

[2003silvaradoltusa]

Hello everyone out there in Chevy JUNK world.Just a note to say that i went to the hearing and it was a big Joke.I think GM.the pigs that they are must also own the bbb.That was a waste of my 4 hours.They treat you like dirt, and were rudd and no help at all.I guess the only way were going to get justice is to sue GM.The GM rep sat there in the meeting and admited to my concerns of the the piston slap and the clunk from the transmission.And also said that its Nomal offered a limited warranity with a smerk on his face.I walked in there with a stack 3 inhes thick with documention, it did nothing.I had the facts,but not the power.The only way to beet these Jerks is to Sue them, so what are we all waiting for.If you let GM ware you down then we all loose.They need to fix these junks.everyone out there, call your Attorney General Office and file your complaints, then go find a good Attorney.GM is doing the wrong thing lets fix that today.

[busta]

silveradoltusa u got to check out cartrackers.com forum iam sure that alot of people there re on your side and LOTS of talk about class action sue,alot has to do with pistonslap.com and gm tranny's taking a shit early? oh but that's normal!

[2003silvaradoltusa]

Originally Posted by busta

silveradoltusa u got to check out cartrackers.com forum iam sure that alot of people there re on your side and LOTS of talk about class action sue,alot has to do with pistonslap.com and gm tranny's taking a shit early? oh but that's normal!

Thank you so much,i will do that, also thanks for adding me to the list thats way cool. Also is if i didn,t mined going to jail, I wood take this truck to GM and burn it right at the factory.I might have a change of heart real soon these GM jerks have really got me pissed off.Stay cool.

[2003silvaradoltusa]

Originally Posted by IHATEMY2500HD!

Hi all. I did a search on the net this morning because I am SOOOO freaking frustrated w/ Chevy and my stupid, stupid truck. I have a 2003 2500HD Crew Cab w/ 35k miles. Well, I have brought it in a couple times now, lets see- for the: horrible downshifting going uphill, clunking when taking off and shifting, clunking when the wheel is turned all the way (I guess this is a huge prob w/ them and the drive shaft part to fix it is on a global b/o), 4wd not in service, SURGING WHILE IN CRUISE CONTROL GOING DOWNHILL!!, low coolant level light and levels down an inch after filling (supposedly can't find a leak), unreliable brakes, windows rattling, seatbelts locking - the list goes on! I know a lot of this has service bulletins to fix it but I just heard from the dealer yesterday that chevy HAS A BULLETIN OUT STATING THE SURGING IN CRUISE IN NORMAL?!?!?!? That is such BS!!!! Anyhow have an idea of what my options are?!? I am in NH and the lemon law doesn't cover any vehicles over 9000 lbs and of course mine is 9200lbs. Why the heck would there ever be such a stupid law out there that protects a huge company like GM from taking back a pos truck that is a lemon?!?!? Anyhow, any ideas ??? I am freaking out and pissed at GM right now. I've already taken this to BBB and arbitration although that's a freaking joke. I have an 02 Tahoe Z71 before this that had the piston slap and was able to get GM to give me the 100k warranty but traded it for this pos. I'm out of warranty in a couple hundred miles and am desperate to figure out what I can do to make GM responsible for their pos truck they won't take responsibility for. Anyone know of a class action lawsuit out there?? I am willing to do what I need to. If it wasn't lettered w/ my hubby's business all over it- I'd be freaking throwing the same decals as someone else mentioned about it being a POS - don't buy! Please IM or e-mail me.. AOL IM teshiaSHI or e-mail moosecountry@gmail.com . Thank you!

Well hello again I did find you,lets see It goes like this.you drive to the chevy store in my case its Carr chevy world in Beverton Oregon.you get there and you want to buy the best you can,so you buy a new 2003 silveradolt 4x4 x cab loaded with everything chevy has to offer.You drive home your so happy with your new truck.Then the one day it hits 12,000 miles and all hell breaks loose.Lets see how it unfolds.they replace all the gears in your trans fer case,then they tear into your transmission,then its a alternator,then its all the rattles from them not putting things back the right way.Then you drive home and all od a suden you have this clunk sound that wasn,t there before,you take it back and they say thats NORMAL,then its both the windows that do want to move,then its the door panel that comes loose,then its the I don,t want to start knight mare they can,t fix,then the computers that don,t want to speak to each other causing all kinds of hell.Then it doesn,t want to go in 4 wheel drive,then when it does it won,t come out,then its the rear frame mount that breaks and makes a raccett,then its the seats and the mirrows that move all over when you hit the remote even when there not programed to do so,then its the wheather stripping around the rear widow,then its lets replace the window,then the radio changes station when open the doors ,Of course the famous piston slap,The fron tire that are out of round,Then It the lastest the tail gate hinges,and while i,m there they they might just as whellreplace the instrument dash panel,and fix the srupine belt,Oh yes and the poopins sound comming from my drivers seat that Normal.I know that i,m missing something else itwill come tome next time i go to drive it,So it looks like we both are driving GM Chevy Clunk Junks piston slap peace of garbage.Now if you go to www.pistonslap.com on that site you can click on attorneys in your State.With any luck you,ll find one.In orgon ther weren,t any,but ther was in cal,give it a try.You could allways drive It to GM and set fire to It.If you own it, Its really no big deal.he good thing Is you,ll hit the stations and the news.They are the ones that can help they have all the power to help us all.

[ponchonutty]

Originally Posted by 2003silvaradoltusa

Thank you so much,i will do that, also thanks for adding me to the list thats way cool. Also is if i didn,t mined going to jail, I wood take this truck to GM and burn it right at the factory.I might have a change of heart real soon these GM jerks have really got me pissed off.Stay cool.

Yeah, you gotta get a lawyer. I had to do all that crap for my '99 Lemon VW which is how I bought my '01 Silverado. The piston slap scares me but almost ALL new cars do it now. I install aftermarket items on ALL makes and I'll tell you GM isn't the first. As for the tranny clunk, there's a guy that sells reprogrammed ECMs with a new flash for tranny shifting. It fixes that problem. He's so good that the Gov. bought 25,000 new ECMs for their GM trucks.

What bothers me is all the problems with the older VATS and the newer Passlock I, II, III, and III+ security systems. GM has no idea what causes the problems or how to fix them. They only replace the whole system but that's only a temporary fix. Every person I know that's had a GM vehicle with some miles on it has had this failure. It's not too plesant when you are running late only to get in your new GM vehicle and have the security lock you out so you can't start it

[skipr]

This is exactly why I am back off from buying a new truck. I have the money, I need a truck (a full size) and There is nothing on the market (all makes) That I am willing to pay 40,000 for. I almost rather getting a 1985 C20 and making it new, but that takes a shitload of time.I know i've done it with a 68 SS El Camino. took 7 years.

[ponchonutty]

Originally Posted by skipr

This is exactly why I am back off from buying a new truck. I have the money, I need a truck (a full size) and There is nothing on the market (all makes) That I am willing to pay 40,000 for. I almost rather getting a 1985 C20 and making it new, but that takes a shitload of time.I know i've done it with a 68 SS El Camino. took 7 years.

Yeah, I was going to do the same with my '78 Stepside but then some fool wanted it more than me and I sold it. Later bought a '99 VW Jetta because I was planning on driving alot for my job. Well, long story short was it was a major lemon. VW gave me enough money to go ahead and get my Silverado but wouldn't have done so if I couldn't have gotten the GM employee price!

[masamunexc]

Hi, I've got an '04 Silvy (4.8L 4x4 Ext. Cab) and when it shifts from 1st to 2nd under slow to normal acceleration, it will quite often bump/clunk into 2nd gear. I can feel it slapping in when it happens. I took it to the dealer and they tried replacing a pressure regulator solenoid (not sure of exact name) on the tranny which seemed to fix the problem for a few weeks but now it's back. Visited the dealer again today and the truck is going in next week sometime to get checked out. Anyone else had this problem? I dont think this is the slapping yoke thing that so many people are talking about, but I could be wrong. Any incite would be helpful, thanks.

[CheeseHead74]

Cost of Gas to get to my Favorite Trans Shop = $10
TCC Replacement Valve w/ a Flush & Fill Service = $150
NEVER having to listen to my tranny clunk again between 1st and 2nd Gear = PRICELESS