2000 S-10 0411 Question

[lowriders10]

I put a 1998 5.7 Vortec into my 2000 S-10. I decide to upgrade to the 0411 computer, and thanks to Lextech, the swap went very well. The truck started on the first try Friday night, and it was awesome!

I got all the usual stuff. I had to wire the fuel gauge return when the fuel gauge didn't work, and I have to do the crank relearn, but I may have an unusual problem.

My truck has a digital PRNDL in the instrument cluster that doesn't seem to function anymore. The PRNDL shows up, but the box that surrounds the gear selection doesn't show anymore.

The shop manual for the S-10 says this occurs when the Class2 Serial data from the PCM does not return the value of the gear selection you have currently selected. Using the EFI program, I can see on the dashboard that the computer does indeed know what gear it's in, and the truck drives fine. It shifts through the gears, and the torque converter locks down appropriately. I just don't have an indication of what gear I'm in.

I should also note that the instructions from Lextech said I needed to splice the wires from the Neutral Safety switch to the PCM, but my truck had the circuits already in existence, unlike the wiring diagram, so I just ran those to the PCM and put them in C1 and C2 as instructed. I just assumed that maybe my truck was built in transition to the new style of PN Safety switch, so I was lucky and already had those circuits.

However, the shop manual for the 2002 Express shows that the 4 circuits that determine what gear you are in (P,A,B,C) splice out after the connector, and attach directly to the Instrument Panel Cluster.

Have any of you had similar issues with the PRNDL not working after upgrading your 0411 with the stock 4.3? Or even better, has anyone had problems after swapping to the 5.7?

Sorry for the long post. I appreciate any feedback anyone can give.

Thanks.

[ChipsByAl]

What base file are you using the 2002 Blazer or Express Van? If you are using the Van, try the 2002 Blazer and see if the cluster will work. Check the vehicle platform configurations, that may help.
Al

[ScarabEpic22]

Im with Al, try using a Blazer base file and run that. There are things deep in each OS that EFILive doesnt have access to that can cause weird small issues like this.

[lowriders10]

Thanks guys. I've thought about trying that, but since I have the 5.7 V8, that can't be a permanent solution. I'll need to keep using the 02 Express file if I want to run the engine.
I'll read the manual for EFI for flashing the computer, and I'll give that a try.
If the 4.3 flash works, does anyone have any ideas how to get the PRNDL to work with the Express? I've actually already done a compare of 02 S-10 and 02 Express files, and nothing in EFI said anything about the PRNDL.
Thanks.

[ScarabEpic22]

Yep I guess so, cant use a 4.3L V6 file as its a V6 not a V8.

Just because EFILive says the calibrations are identical means the parameters EFILive has access to is identical, not the actual OS and other parameters not visible to us. Just like F-bodies have different OS features than a Vette, same goes for a Blazer vs a truck or SUV or F-body.

[bvd80]

I did a similar swap in my '02 GMC Highrider ZR2. I put a crate 5.7L Vortec in it and it is currently my DD and has almost 25K on it.

I recall the same issue with mine and another persons PCM I tuned that did the swap. What I did was use ONLY the engine segment from the '02 Express van and copied that into the '02 S10 truck tune file. Then flash that '02 S10 file with the new engine segment into your PCM.

Essentially, the only thing you are changing is the engine and everything else will run as stock like when the V6 was in there.

Works prefect for me....

[ScarabEpic22]

bvd80, I was just thinking about this as well!

To lowriders10, take your S10 file and do a segment swap for the Express Van Engine segment. You'll keep all the S10 OS features but be able to run the V8 motor without issue. As bvd said, you need to use 02 S10 and Express Van tunes to make this work, looks like you're all set on the Van side so grab an S10 file, do a seg swap, and full flash your PCM.

[lowriders10]

Thanks guys! I will give this a try, but it seems to be the right thing to do! Much appreciated!

[ScarabEpic22]

No problem, if you need a hand with the seg swap I can help you out. Post the S10 and Van tunes here, I wont copy your tune over (that'd just be too easy for you! :D) but I can do the seg swap if you cant get it done.

[lowriders10]

Thanks Erik. I'm going to try to do the seg swap myself first, but if I have any problems, I'll ask some questions. I'll likely do it in a couple weeks; I'm just finishing up some small details on the swap. I just got the engine running Friday, but I still have a list of things to do.

[ScarabEpic22]

No prob, even if you just want another set of eyes to take a quick peek!

[lowriders10]

I've made a .tun file based on a 2002 S-10 Baseline, copied both the Engine Calibration and Engine Diagnostics into the S-10 file from the original 2002 Express program from my computer. I then modified the rear axle to 3.08 (I've got a 3.42 rear end, just need to clean it up and replace all brakes), and adjusted the gas tank size to 70L.

One question if I may. Should I first fix all the DTC issues with the original computer (I have three - Alternator code, Crank relearn and a fuel gauge issue) and then copy the two sections, or put this program in first, and see what codes I get then?

Thanks for your opinions!

Bill.

[ScarabEpic22]

Id try it as is, the crank relearn will go away once you do the relearn manually via scan tool DVTs, alternator code Im not sure (do you need to set the platform options differently, I dont know just thinking out loud), and fuel guage I have no clue.

Remember to full flash! :) Then do the Crank relearn, I dont think that gets overwritten in a full flash...might be wrong though.

[lowriders10]

Thanks. I'll see how it goes on Saturday!

Bill.

[lowriders10]

Remember to full flash! :) Then do the Crank relearn, I dont think that gets overwritten in a full flash...might be wrong though.

Just a question. The PCM was from a 2002 Savana 1500, and already has the correct operating system. Isn't the full reflash used to change the operating system prior to flashing? I've been reading the help file to make sure I know what I'm doing.

Thanks.

[ScarabEpic22]

Well no, you're going to use the base OS of a Blazer tune. The engine segment is only part of the file, this is what will be different over every other stock Blazer OS/Cal. You'd have to full flash the tune in anyway even if you started with a PCM that had the correct Blazer OS as the engine segment will be from a Van now and not a Blazer. Hope that makes sense.

Full flashing can change the OS, but it also is designed to update parts of the actual OS that EFILive doesnt let you modify in tables. For example, the Engine segment has the tables you can actually see in EFILive plus a LOT of code that actually runs the engine. Since you are modifying this code in the tune file via the seg swap, you must update it in the PCM by full flashed it into the PCM otherwise you could end up with a Van engine calibration and a Blazer engine OS. BAD, I dont think EFILive will let you do this but I havent tested it.

For LS1s, I think you can just full flash the Blazer tune + Van engine segment + tables modified into it and be done, I know both my E67 and T42 were that way. Running a COS is different though, the OS EFILive provides is just the OS and you cant actually add a calibration to it until it is read back out. Not sure why.

P.S. Why do all my posts have this HUGE blank area between my text and sig? There arent any extra lines after I end my posts...

[ChipsByAl]

Open both tun files in separate EFI_Live programs. If the OS match and have the same checksum you can be fairly sure both of the OS will match and a cal only reflash will be fine. If the OS numbers or checksums are different, perform a full flash.
Al

[lowriders10]

Thanks for the info. I need to do the crank relearn, and I see how to do it on page 152, but I can't see how to do it in the software. Can anyone help me? Thanks!

[tokymon]

in the scan tool it's in the dvt area.
411 is the best upgraded for the l31 motors (other that going to eficonnection's 24x cnp set up) ls1 style

[lowriders10]

Thanks Tokymon. I reflashed the computer with a new program. I hasn't asked for a relearn yet, but I'll get it done if needed.

[ChipsByAl]

The crankshaft variation learn procedure is "required" whenever the crankshaft, crankshaft sensor, block or PCM has been replaced. This allows the PCM to be in very accurate sync with the unique characteristics of the crankshaft to sensor signal. It is for misfire diagnostics. Once a new PCM has had the learn procedure done, the code will not reset. The PCM you are using has had this procedure done already and therefore it is not setting the DTC for the procedure.
Al

[lowriders10]

The crankshaft variation learn procedure is "required" whenever the crankshaft, crankshaft sensor, block or PCM has been replaced. This allows the PCM to be in very accurate sync with the unique characteristics of the crankshaft to sensor signal. It is for misfire diagnostics. Once a new PCM has had the learn procedure done, the code will not reset. The PCM you are using has had this procedure done already and therefore it is not setting the DTC for the procedure.
Al

Thanks. I haven't been able to run the crank relearn yet. Every time I've clicked on the case button, it comes up with an error something like "Error communicating try again". But that was with the old tune. I'll be starting the truck again today. I'll see if it asks again.