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GM reset procedure

M

muffman

PM 2012
Full Member
Joined
Jun 30, 2003
Messages
794
Location
Gresham, Oregon, USA
I was at the dealership today, and was asking the service writer what techique they use for resetting the computer and putting it into "learn" mode. I described to him the process I had been using for not only myself but my customers (the Flowmaster technique).

He claimed that at the dealership, they disconnect the positive, and negative terminals, and simply touch them together.

Has anyone else heard of this?
 
Never heard of that one. What good would it do to touch the 2 together?? I thought that you just disconected the battery, then reconnected it.. ???
 
Interesting......but kinda makes a bit of sense....

disconnecting removes the power for the memory....and puting positve and black together...ensure the computer is grounded....and all voltages kept inside any capaicters ect would be discharged.....

I guess it depends on the type of memory the ECm uses...

 
As far as I know you just disconnect the Battery. It must be disconnected for about 5-10 minutes because there may be an internal capacitor which holds a charge so that may be why they touch the connectors?

 
??? I worked for GM and I Never Heard of Such BS - Just Disconnect battery ( both cables ) for approx 15 seconds.
 
I disconnected just the neg side for about 45 minutes and I'm fairly sure that mine reset based on the way it ran for the first few minutes.
 
If my transmission has "learned" a driving habit and become sluggish on shifting, do you think that dissconnecting the battery would help any?


Wiki
 
I believe so Wiki. From what I understand and have read the computer learns how you drive and slightly adjusts the tranny to shift in different patterns, like keeping it in second slightly longer.

~bekind
 
So if you were to change driving habits how long would it take the computer to adjust on it's own? I might have to reset my computer just for ha-ha's Any reason why I shouldn't?

-Mark
 
Now will that also lock up your radio because of the anti theft code? I don't want to hook the battery up and have my radio LOCKED TIGHT!!


Wiki
 
Wiki said:
Now will that also lock up your radio because of the anti theft code? I don't want to hook the battery up and have my radio LOCKED TIGHT!!

Wiki
Click to expand...

Check your owner's manual re: the code. I believe you have to program in a code before it will lock anyone out.
 
Wiki

If you have an 03, it should be okay as look as its VIN number hasn't changed in the PCM....

If you have an 02, then you need to enter your code....

dichris
 
NW_Nick is right, 03's you need to set the code first. I've never set mine, and have reset the computer several times, no problemo.

Long time no see NW_Nick, lurking I see....LOL >:D
 
muffman said:
Long time no see NW_Nick, lurking I see....LOL >:D
Click to expand...

Lurk, lurk lurk lurk.... :)

Still enjoying my exhaust! Although now I'm thinking I should have held out for the other tips .. :rolleyes:
 
NW_Nick said:
Wiki said:
Now will that also lock up your radio because of the anti theft code? I don't want to hook the battery up and have my radio LOCKED TIGHT!!

Wiki
Click to expand...

Check your owner's manual re: the code. I believe you have to program in a code before it will lock anyone out.
Click to expand...


i believe that is correct. i had my battery disconnected several times, and the radio never locked up.
 
whitethunder said:
As far as I know you just disconnect the Battery. It must be disconnected for about 5-10 minutes because there may be an internal capacitor which holds a charge so that may be why they touch the connectors?
Click to expand...


if there are capacitors inside retaining power wouldn't touching "+" to "-" ground out that source of power? this would "reset" the computer as mentioned above.
i do not think it could hurt. you already have one lead disconnected. just disconnect the other, and touch them together.
 
Okay, so why would I want to re-set the computer chip to "learn" mode? ???

From the comments it sounds interesting and certainly easy.

Would appreciate any advise!

Thanks!!

RLT
 
Rltturn said:
Okay, so why would I want to re-set the computer chip to "learn" mode? ???

From the comments it sounds interesting and certainly easy.

Would appreciate any advise!

Thanks!!

RLT
Click to expand...

I think resetting after buying one that has been used would be a little more useful. That way it adjusts to your driving style. Other than that I really can't think of to many reasons. SOm clarification of reasons to reset your computer woudl be nice.

Thanks :B:
 
my simplistic understanding based solely on what I have read on this site is that it would be a good idea to do this reset if you do any kind of performance modification to the Av, such as exhaust or intake, etc. I believe then that paramaters such as timing, fuel mixture, etc. are able to be adjusted as necessary for the new component(s).

Just what I read regurgitated (hopefully semi-accurately) :cautious:

Rich
 
RichUF said:
my simplistic understanding based solely on what I have read on this site is that it would be a good idea to do this reset if you do any kind of performance modification to the Av, such as exhaust or intake, etc. I believe then that paramaters such as timing, fuel mixture, etc. are able to be adjusted as necessary for the new component(s).

Just what I read regurgitated (hopefully semi-accurately) :cautious:

Rich
Click to expand...

I appreciate the regurgitated info even if semi-accurate. Gives me a good idea what it is useful for. What you said makes sense :)
 
ChevyAV2003 said:
RichUF said:
my simplistic understanding based solely on what I have read on this site is that it would be a good idea to do this reset if you do any kind of performance modification to the Av, such as exhaust or intake, etc. I believe then that paramaters such as timing, fuel mixture, etc. are able to be adjusted as necessary for the new component(s).

Just what I read regurgitated (hopefully semi-accurately) :cautious:

Rich
Click to expand...

I appreciate the regurgitated info even if semi-accurate. Gives me a good idea what it is useful for. What you said makes sense :)
Click to expand...


hey guy's, he is correct. when you do any mods you will want to reset the computer so the computer can learn the new parameters of the recent mod. i.e., headers, K&N FIPK, throttle body spacer, exhaust, and so on.
 
Is this something that would be done regularly, whether there are performance mods or not? I mean, would you do this twice a year regardless?
 
i do not see the need unless you do something to the truck in the way of a performance mod. or, if you just decide to do it one day for the hell of it, reset the computer, drive it like you stole it. then it will learn this "new" driving pattern.
eventually it will recognize the "old" driving pattern and return to those previous settings. when you mod with "hardware or software" the mod will be in place the computer will learn it, and keep it as long as it is installed. by hardware i mean exhaust or headers. by software i mean a Predator programmer.
if anyone has anything else to add, by all means... i may have left something out. i am getting a little feeble minded in my old age.
 
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