Chevy SSR Forum banner

1 - 20 of 24 Posts

·
Premium Member
Joined
·
1,373 Posts
Discussion Starter #1
:|

I know some of you have been following my gear swap saga and then onto problems trying to get my PCM re-programmed to reflect the new 456 ratio correctly.

Just spoke with Mark at PCM of NC in Morresville. Advised him that his changes to my PCM did not work. Readings versus my GPS remain 10-12 mph off more or less. He used the tire size info and new gear set info to input his values.

Told me he uses HP Tuner while on the other hand, he told me he thought Keith at PCMforless in Ohio used LS2 Edit.

Keith had been unable to get into my PCM with his program, so now I'm seeking info from others that have used Keith or other sources to get theirs accurately changed. Perhaps Keith has only had success doing an alteration on a 2003/4 model which I understand uses a different style of PCM???

Would like to hear back from anybody with an 05/06 model that has swapped out their rear gear set and had a successful and accurate alteration done to their speedo. Who did the alteration and what program did they use...........or did they just "play" with tire sizes and gear ratios to fake out the PCM and get the speedo close.:confused
 

·
Genuinely SSR Obsessed
Joined
·
7,704 Posts
Whaaaaat??

Holy Moly, 'Scoot. It really seems this whole 'mucked up' adventure has been one big Train Wreck so far for you........:surprise:


----|:cry|---- images-23.jpeg ----|:cry|----​


●□● - And the worst part (I guess) is that it still hasn't been resolved yet! Hope you get some help//relief soon. :nerd:





================
David :black:
images-1.png
 

·
Premium Member
Joined
·
2,383 Posts
:|

I know some of you have been following my gear swap saga and then onto problems trying to get my PCM re-programmed to reflect the new 456 ratio correctly.

Just spoke with Mark at PCM of NC in Morresville. Advised him that his changes to my PCM did not work. Readings versus my GPS remain 10-12 mph off more or less. He used the tire size info and new gear set info to input his values.

Told me he uses HP Tuner while on the other hand, he told me he thought Keith at PCMforless in Ohio used LS2 Edit.

Keith had been unable to get into my PCM with his program, so now I'm seeking info from others that have used Keith or other sources to get theirs accurately changed. Perhaps Keith has only had success doing an alteration on a 2003/4 model which I understand uses a different style of PCM???

Would like to hear back from anybody with an 05/06 model that has swapped out their rear gear set and had a successful and accurate alteration done to their speedo. Who did the alteration and what program did they use...........or did they just "play" with tire sizes and gear ratios to fake out the PCM and get the speedo close.:confused
I just got off the phone with Keith. He had an unknown hardware problem when he tried to get into your ECM using LS2
Edit, hence he thought your ECM was locked. LS2 Edit is the one and only program that will do the correction and it was used successfully when mine was done back in 07. Mine is an 05 6 speed with 4.56s and is dead on, speedo wise! Keith assured me that he can do the correction for you once he gets his repaired cable/box back from LS2 Edit. Give him a call.
 

·
Resident Rocket Scientist
Joined
·
11,994 Posts
I just got off the phone with Keith. He had an unknown hardware problem when he tried to get into your ECM using LS2
Edit, hence he thought your ECM was locked. LS2 Edit is the one and only program that will do the correction and it was used successfully when mine was done back in 07. Mine is an 05 6 speed with 4.56s and is dead on, speedo wise! Keith assured me that he can do the correction for you once he gets his repaired cable/box back from LS2 Edit. Give him a call.
Yes, same for my 05 with 4.56 gears. Must use LS2 edit, as HP Tuners is missing something somewhere to get the 4.56 change in place.
 

·
Premium Member
Joined
·
1,373 Posts
Discussion Starter #5
I just got off the phone with Keith. He had an unknown hardware problem when he tried to get into your ECM using LS2
Edit, hence he thought your ECM was locked. LS2 Edit is the one and only program that will do the correction and it was used successfully when mine was done back in 07. Mine is an 05 6 speed with 4.56s and is dead on, speedo wise! Keith assured me that he can do the correction for you once he gets his repaired cable/box back from LS2 Edit. Give him a call.
:smile2:

Topspin, I appreciate the update. Last info that I had from Keith was of course regarding the "locked up" scenario. He was forwarding the PCM on to Mark at PCM of NC for unlocking, plus he was to be mailing me back my check...........which hopefully arrives here tomorrow. Mark did not find the PCM to be locked and so did his thing as earlier described........didn't work.

I really really do not look forward to jerking that PCM back out again. My SSR is lowered and the location of the PCM causes me to have to bend over at such an angle that it just "kills" my lower back. Gotta go at it just a little at a time.:frown2:

Not sure why Keith didn't get back to me with the same info that you just provided to let me know that he had some kind of other "glitch" that didn't allow his program to access my unit.:rolleyes:

I'll try to get in contact with him again later this week to see what he has to say.

Thanks again.
 

·
BlueStreak
Joined
·
26,588 Posts
:smile2:

Topspin, I appreciate the update. Last info that I had from Keith was of course regarding the "locked up" scenario. He was forwarding the PCM on to Mark at PCM of NC for unlocking, plus he was to be mailing me back my check...........which hopefully arrives here tomorrow. Mark did not find the PCM to be locked and so did his thing as earlier described........didn't work.

I really really do not look forward to jerking that PCM back out again. My SSR is lowered and the location of the PCM causes me to have to bend over at such an angle that it just "kills" my lower back. Gotta go at it just a little at a time.:frown2:

Not sure why Keith didn't get back to me with the same info that you just provided to let me know that he had some kind of other "glitch" that didn't allow his program to access my unit.:rolleyes:

I'll try to get in contact with him again later this week to see what he has to say.

Thanks again.
Looking at this from the sidelines, with absolutely no background in your problem except what I read here, I would say If Kieth sent your check back and forwarded your ECM on to someone else for you he likely figured your were done with him and saw no need to discuss it further. Don't be to hard on him, and good luck with your speedo.
 

·
Registered
Joined
·
3,373 Posts
Hope you can finally get your speedo fixed. I think I heard that 03-04 was much harder to program for 4.56 than 05/06 but if that were the case it seems like someone would have chimed in by now. if so I hope they do for your sake
 

·
Super Road Rocket Pilot
Joined
·
5,741 Posts
Yes, as Topspin mentioned, LS2 Edit is the ONLY program that can do the work on an 05-06. Not sure why Keith did not call you regarding his problem and correcting it but if I were you I would ping him again after you get the check and then work just a few minutes a day while the weather is crappy to get it out one last time and get it done right.


Hope you can finally get your speedo fixed. I think I heard that 03-04 was much harder to program for 4.56 than 05/06 but if that were the case it seems like someone would have chimed in by now. if so I hope they do for your sake
Actually, the programming problem is just opposite of what you describe. The 03-04 is easily done with many different handheld programmers available everywhere, the 05-06 has to be done by special software that you "break into" and change the computer programming by hand.
 

·
Premium Member
Joined
·
1,569 Posts
PCM for less did mine originally. It was spot on.

I have since had mine "retuned" at the last two Internationals as I have done some more things done to the R. If you get to the next International one in Bronson, maybe you can have it done there.

Will anyone be able to do that at Maggie Valley?

Dave
 

·
Premium Member
Joined
·
2,383 Posts
PCM for less did mine originally. It was spot on.

I have since had mine "retuned" at the last two Internationals as I have done some more things done to the R. If you get to the next International one in Bronson, maybe you can have it done there.

Will anyone be able to do that at Maggie Valley?

Dave
Dave, unfortunately most tuners are using HP Tuners as their tuning tool and it won't do the correction. For example, both popular tuners from this site, Joe Delano out west and Jeremy from the east coast, use HP Tuners and cannot do the deed. Many that use HP Tuners think that they have the ability to make the change as HP Tuners does have that function and it does work for other vehicles, but it doesn't work for our ECM!

Your best bet is to always ask the tuner what software he's using - if it's HP Tuners you're out of luck. Now if the tuner is using LS2 Edit and is a sharp guy that can figure the tire diameter change needed, you're in luck. So far, just the Brian Herter/Keith Wenzel duo @ PCM4less have been successful.
 

·
Premium Member
Joined
·
1,834 Posts
Now if the tuner is using LS2 Edit and is a sharp guy that can figure the tire diameter change needed, you're in luck. So far, just the Brian Herter/Keith Wenzel duo @ PCM4less have been successful.
Question -- So the speedo correction is done by entering in an incorrect tire size to make up for the difference in the rear gear ratio?

Also has anybody that has done the 05-06 correction is this done though the ECM or the TCM -- the wiring diagram shows that the vehicle speed sensor signal goes to the TCM on the 05-06 automatics. There is a single wire for VSS going from the TCM to the ECM (picture 1), so is the A/D (analog to digital ) converter located in the TCM and the speed information is then also used by the TCM to decide shift points? If this were true wouldn't you have to send the TCM for programming?

SO to try and figure this out, I looked up the trouble shooting for a faulty speed sensor it showed a wiring diagram that the VSS sent the signal to the ECM? Picture 2 - from DTC P0502 VSS signal low

So now I'm really confused on how this is wired or how the speedo correction is accomplished?

Has anybody with an 05-06 AUTOMATIC been able to send out their ECM only and get the correction done or was their correction done with on board programming (plugging into diagnostic link connector (DLC))

By the way the the manual transmission does not use a TCM and the VSS goes to the ECM, so I can see just sending out the ECM.
 

Attachments

·
Premium Member
Joined
·
2,383 Posts
Question -- So the speedo correction is done by entering in an incorrect tire size to make up for the difference in the rear gear ratio?

Also has anybody that has done the 05-06 correction is this done though the ECM or the TCM -- the wiring diagram shows that the vehicle speed sensor signal goes to the TCM on the 05-06 automatics. There is a single wire for VSS going from the TCM to the ECM (picture 1), so is the A/D (analog to digital ) converter located in the TCM and the speed information is then also used by the TCM to decide shift points? If this were true wouldn't you have to send the TCM for programming?

SO to try and figure this out, I looked up the trouble shooting for a faulty speed sensor it showed a wiring diagram that the VSS sent the signal to the ECM? Picture 2 - from DTC P0502 VSS signal low

So now I'm really confused on how this is wired or how the speedo correction is accomplished?

Has anybody with an 05-06 AUTOMATIC been able to send out their PCM only and get the correction done or was their correction done with on board programming (plugging into diagnostic link connector (DLC))

By the way the the manual transmission does not use a TCM and the VSS goes to the ECM, so I can see just sending out the ECM.
Yes, I believe it's the tire diameter file that is altered to get the speedo corrected. I also believe that both the ECM and the TCM need to be sent for automatics.
 

·
Premium Member
Joined
·
1,373 Posts
Discussion Starter #14
Looking at this from the sidelines, with absolutely no background in your problem except what I read here, I would say If Kieth sent your check back and forwarded your ECM on to someone else for you he likely figured your were done with him and saw no need to discuss it further. Don't be to hard on him, and good luck with your speedo.
:|

Well, here is my latest update as to this (saga). As I now understand his (Keiths) problem with equipment.....he has (as Topspin has mentioned)......some kind of hardware/software device that has malfunctioned and is off to be repaired.

He tells me that once he has that back, he should be able to make the alterations to my PCM,

(I note that Topspin calls it a ECM, but what ever the real name, PCM stands for Power train control module).

So, given that I should soon see a "credit" from Keith for my original check which he had cashed...........finally shows up.:skep

He has told me that he will contact me when the repaired device comes back and he can then do the deal. At that point, I guess my relatively only option is to send it back to him again along with another check and hope for the best.:whistling:
 

·
Premium Member
Joined
·
1,373 Posts
Discussion Starter #17
'03 & '04 = PCM

'05 & '06 = ECM & TCM

Mmmm = M&M
:surprise:
Bruce, that seems kinda strange as there were no six speeds in 03/04. So if I understand correctly, some with those models have indeed swapped out their rear gears. Thus they then had someone alter their PCM.......................Whereas recent chatter has suggested that in the 05/06 models, one with an automatic that did the same thing......swap out their rear gears, would NOT just send in their (ECM) but also their TCM.:banghead

Somehow, it seems strange to me that the two intial model years with an "auto" trans can maybe do an alter with just one control module whereas it seems the 05/06 model with an "auto" would have to have two different modules worked upon.:confused
 

·
BlueStreak
Joined
·
26,588 Posts
:surprise:
Bruce, that seems kinda strange as there were no six speeds in 03/04. So if I understand correctly, some with those models have indeed swapped out their rear gears. Thus they then had someone alter their PCM.......................Whereas recent chatter has suggested that in the 05/06 models, one with an automatic that did the same thing......swap out their rear gears, would NOT just send in their (ECM) but also their TCM.:banghead

Somehow, it seems strange to me that the two intial model years with an "auto" trans can maybe do an alter with just one control module whereas it seems the 05/06 model with an "auto" would have to have two different modules worked upon.:confused
Part of the change made when going from 5.3l to 6.0l included a whole lot of new code being written for a much more powerful set of electronic in a different configuration of building blocks. This would make a considerable difference in making the changes necessary. Dicktator often begins his Tech Seminars with a quick run through of the numbers involved in this.
 

·
Premium Member
Joined
·
429 Posts
speedo

Keith did my 05, 6 speed, 4.56 speedo correction. I dropped the SSR off at his house since he is only 25 miles away. He had it done the next day. I did not ask about any particulars as to the process. I think it was done in July. He might still have my truck on file. Good luck.
 
1 - 20 of 24 Posts
About this Discussion
23 Replies
12 Participants
moscooter
Chevy SSR Forum
Chevy SSR Forum - where SSR fans discuss modifications, wheel & tire tech, performance and so much more!
Full Forum Listing
Top