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Tranny problems 03 - Z71 45,000 KL (27,900 miles)

Camper

Full Member
Joined
Jul 25, 2006
Messages
36
Location
Ottawa
:E:

Well it started last week when it caught me by surprise, as I was leaving a stop, I noticed that I was taking off in 3rd gear. It would stay like this until I would turn off the ignition for about a minuet and restart. It would then run fine for a day or two before doing it again. I was trying to pin point the symptoms so I could pass the proper info the mechanic who works on it.

Only having the AV since last July and not had any problems as of yet I was not sure where to take it. To the (screw you over dealer) or the (screw you over tranny shop) I took it to a tranny shop and they replaced a few parts. They were very detailed in their explanations as we went through the problems.

This unit was built in Aug 2002. they explained that a wiring harness (inner trans) needed replacing as well as some other parts, EPC controller, PWM modulator, L/U solenoid, 3/2 shift controller, of course did an oil change. They said that the computer may need to be reflashed but they were able to clear the codes so that was not required. It ran ok for about 2 hours or so then did it again. I called them back right away. This was late last Thursday just before the long weekend. Mechanics were all gone home for the weekend. The manager / owner said that if the unit reset he would check it out Monday. The tranny reset when I turned it off then on and did it two more times during the weekend. Ran ok the rest of the time.

Between yesterday and today the tranny shop had the AV and tried to figure out the problem. They called their tech support. They took the computer out to, two separate dealers for them to flash the board and they would not as the dealer said that the computer has two newer versions and they could not flash an older board. I would have to buy a new computer $700.00. The tranny shop and their tech support, did not think that because of the symptoms that the computer was the problem so they put it back in.

This is what they are leaning towards as possible problems. I do have a remote starter. They did speak of this being a possible problem. I don?t know enough about what happens with remote starters to say this is or is not a possibility. Other then I believe that when vehicles start, they disable other devices during this period. Not sure. I do know  that there are a number of modules that need to talk to each other for auto start / security  to work properly and I had the work done at the dealer by the GM factory trained techs.

The other possibility is the ignition as GM has had some problems in the past. I am not sure about this ether. I guess the next step is to take it to the dealer.

Any insight on this would be great. Thanks
 
take it to a Autozone or Kragen and see if they can pull any codes, it has the symptoms of a ignition switch problem. do the gauges act funny at all? 
 
do the gauges act funny at all?


Tranny shop asked the same question about the gauges. No they are working fine. In all but one occurrence the engine light did not come on ether. The last time it happened the engine light did come on. It also shifted heavily into drive and then in to first before staying in 3rd.
 
Ignition switch... and/or remote starter
 
It still sounds like the ignition switch. However, did it happen as you were driving or did you shut it off and then restart to have it happen?
 
Camper said:
Tranny shop asked the same question about the gauges. No they are working fine. In all but one occurrence the engine light did not come on ether. The last time it happened the engine light did come on. It also shifted heavily into drive and then in to first before staying in 3rd.
sounds like a good shop
 
t still sounds like the ignition switch. However, did it happen as you were driving or did you shut it off and then restart to have it happen?

In almost every occasion it happened when I was driving. Only once it happened when I just started it with the key only not the remote start.

This is an intermittent thing. The tranny shop asked me not to use the remote start for a few days to see if it made a difference. After they asked me to do this it did it the very first time and since then not again.

From what the tranny shop is leaning to as well as what I am reading here, it is sounding like the ignition.

It is going into the dealer tomorrow. Get this, I got the tranny shop to collaborate with the dealer to come up with the proper diagnoses.  We will see what happens tomorrow.

Thanks for your input

I will update on what happens.
 
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