02 LS1 411 PCM in 99 S10 Speedometer works until key off then doesn't work??????

[Rumnarv]

I'm helping someone with a 2002 camaro LS1/4L60E swap into a 99 S-10 extreme. The 411 PCM used came from an 02 camaro. I used HP tuners to kill the VATS and after the flash everything worked fine until the truck was switched off. When you restart it the speedometer and cruise stop working. With a scanner connected VSS always shows the correct speed. I did a write entire and it works until you turn it off and restart the truck. We switched the pcm with another one from an 00 camaro and the truck works correctly.

Any ideas what would cause this??

[Montecarlodrag]

If you unplug the battery for a few mins, the speedo works again or not?

[CalEditor@pcmcalibrators]

I'm helping someone with a 2002 camaro LS1/4L60E swap into a 99 S-10 extreme. The 411 PCM used came from an 02 camaro. I used HP tuners to kill the VATS and after the flash everything worked fine until the truck was switched off. When you restart it the speedometer and cruise stop working. With a scanner connected VSS always shows the correct speed. I did a write entire and it works until you turn it off and restart the truck. We switched the pcm with another one from an 00 camaro and the truck works correctly.

Any ideas what would cause this??

Post your cal and I will look at it

[Rumnarv]

Post your cal and I will look at it

Awesome!JosephS10.hpt

[CalEditor@pcmcalibrators]

That tune has a lot of issues.
You need to use a 2001 or 02 4.3L tune for an S10 and then go back and make it a LS1

I can do it for you, but I have 4 tunes to knock out currently. I still have a CTS-V tune to build with an 4L80. If you can give me over the holidays I can get you a tune that will work correctly

[Rumnarv]

That tune has a lot of issues.
You need to use a 2001 or 02 4.3L tune for an S10 and then go back and make it a LS1

I can do it for you, but I have 4 tunes to knock out currently. I still have a CTS-V tune to build with an 4L80. If you can give me over the holidays I can get you a tune that will work correctly

That would be awesome. Thanks for your help!

[rpturbo]

That tune has a lot of issues.
You need to use a 2001 or 02 4.3L tune for an S10 and then go back and make it a LS1

I can do it for you, but I have 4 tunes to knock out currently. I still have a CTS-V tune to build with an 4L80. If you can give me over the holidays I can get you a tune that will work correctly

I am curious why you say to use a 01 or 02 S10 tune, and change it over to LS1? Does it have something to do with the os? I have an older s10 (94) that has the 01 Silverado ECM in it. I was told to use this from my harness builder. I am new to tuning, and just trying to learn.

[CalEditor@pcmcalibrators]

In 2002 you will find the same OS used in a Corvette, full size truck and the S10 series. This takes the OS out of the picture. The calibration has 7 additional segments.
Engine
Engine Diag
Trans
Trans Diag
Fuel System
System
Speedo

Lets skip the first 2 for now

In 2002 all of the Trans and Trans Diag segments were built from the same template except the 2002 Flex Fuel calibration
This means that they all will interchange. I would use the S10 trans segments and then rework it fro the engine swap
The Fuel System Segment contains information about the FUEL TANK and the EVAP System. This is a no brainer. You use the S10 fuel system segment
The System Segment contains the Fan Settings, AC Settings, Instrument Cluster Settings, VTD Settings, Alternator Settings, Vehicle Platform and Powertrain Type Settings, and Real Time Dampening Settings. I would us the S10 segment. HPT currently offers enough parameters that will allow you to alter this for the V8
The Speedo Segment has a few lines of code and it would be easiest to use the S10 Speedo Segment.

The Engine and Engine Diag Segments should stay together for easy of tuning. I would start with the segments for the engine used in the swap. The Engine Daig segment has more that just the DTC's in it. This is a very important segment to have correct. HPT has a limited amount of parameters. I found that the 2002 S10 knock sensors are the LS2 type and that the Engine Diag Segment contains settings that must be changed to make the 1 wire knock sensors. Yes you can make it work without making the 2 or 3 settings, but it will take an additional 5 changes trying to get around the missing settings. The good news is that HPT is adding the needed setting currently

[CalEditor@pcmcalibrators]

Try the attached file. If it ask you to license it do not. It would mean that I have made an error. This may or may not require a write entire, so I would do the write entire.

[CalEditor@pcmcalibrators]

This is the 2002 S10 file I used. You can do a little compare with it

[Rumnarv]

This is the 2002 S10 file I used. You can do a little compare with it

Awesome, thanks for the help! I'll load it up and let you know how it goes.

Thanks Again!

[04colyZQ8]

Try the attached file. If it ask you to license it do not. It would mean that I have made an error. This may or may not require q write entire, so I would do the write entire.

Mmm interesting! I'm trying to help a friend get his speedo working on a 2004 Colorado with a V8 swap, he is using a 2002 Camaro PCM, and has no speedo. I bet it is set up similarly to the Colorado? Maybe you can helps us get it working. Other people including myself have got the speedo working using a 05-06 E40 PCM from a trailblazer. Not sure if you can use the speedo segment from one of them or the stock P12 PCM from the Colorado, and install that into the P01. Otherwise I have a feeling the speedo settings from the P59 PCM (2004 trailblazer 5.3L) will also work. Any help would be a appreciated!

[CalEditor@pcmcalibrators]

The 2004 Colorado cluster's speedo and Tach signals come in on a serial data line (Class II). The Trailblazer and Camaro have a hardwired Speedo and Tach. I am able set the speedo to Class II on the 2002 Camaro.

[04colyZQ8]

Oh nice! I imagine I can't do that with HP tuners! I don't see a tab in HP tuners for the earlier PCMs, the newer ones you can switch between reptos, serial etc.. I can I change it to serial? Thanks again for your help!

[Mike1995]

So your saying you can do an engine segment swap?

I recently did my 2002 S10 to a Vortec V8 swap. I used a 2002 Express file as a donor, but HPT had to do a trans segment swap from 80 to 60e. But I lost some functionality like shift indicator and my auto door locks do not work right.

In 2002 you will find the same OS used in a Corvette, full size truck and the S10 series. This takes the OS out of the picture. The calibration has 7 additional segments.
Engine
Engine Diag
Trans
Trans Diag
Fuel System
System
Speedo

Lets skip the first 2 for now

In 2002 all of the Trans and Trans Diag segments were built from the same template except the 2002 Flex Fuel calibration
This means that they all will interchange. I would use the S10 trans segments and then rework it fro the engine swap
The Fuel System Segment contains information about the FUEL TANK and the EVAP System. This is a no brainer. You use the S10 fuel system segment
The System Segment contains the Fan Settings, AC Settings, Instrument Cluster Settings, VTD Settings, Alternator Settings, Vehicle Platform and Powertrain Type Settings, and Real Time Dampening Settings. I would us the S10 segment. HPT currently offers enough parameters that will allow you to alter this for the V8
The Speedo Segment has a few lines of code and it would be easiest to use the S10 Speedo Segment.

The Engine and Engine Diag Segments should stay together for easy of tuning. I would start with the segments for the engine used in the swap. The Engine Daig segment has more that just the DTC's in it. This is a very important segment to have correct. HPT has a limited amount of parameters. I found that the 2002 S10 knock sensors are the LS2 type and that the Engine Diag Segment contains settings that must be changed to make the 1 wire knock sensors. Yes you can make it work without making the 2 or 3 settings, but it will take an additional 5 changes trying to get around the missing settings. The good news is that HPT is adding the needed setting currently

[CalEditor@pcmcalibrators]

So your saying you can do an engine segment swap?

I recently did my 2002 S10 to a Vortec V8 swap. I used a 2002 Express file as a donor, but HPT had to do a trans segment swap from 80 to 60e. But I lost some functionality like shift indicator and my auto door locks do not work right.

You do not want to do a segment swap most of the time. It is not the golden answer. You need to modify an S10 calibration. They run the same OS.

[04colyZQ8]

You do not want to do a segment swap most of the time. It is not the golden answer. You need to modify an S10 calibration. They run the same OS.

Yes but correct me if I am wrong, the S10 uses reptos What ever that means? and is fed to the cluster via its own speed signal? On the Colorado al gauge functions are sent via class 2 serial data.

[CalEditor@pcmcalibrators]

I found a "Boolean aka Switch" in the code to switch it to Class II serial data

[04colyZQ8]

I found a "Boolean aka Switch" in the code to switch it to Class II serial data

Nice you rock! That's way over my head! Would you be able to switch it for my buddies truck? How would we go about it and how much would you charge? Can you work with his file in np tuners format?