agreed. if you can connect to other trucks without any problems, it sounds like either your software or your module itself is the issue, not the PC.

 

ok... hooked it to my pc in the house and got the same problems. it has an actual serial port too so it looks like it is something else.

no responce from carputing yet, can anyone send me the latestest edit file? i thought i had the latest.

 

The only time I've had that issue is when it glitched while reading or programing. Does the computer work in the truck right now? And I assume your using the harness to read the 01 computer right?

A reflash of the PCM was all that was required to correct my situation.

Dennis

 

truck runs fine, when you say you had it reflashed did you just take it to the dealer? how much was it?

 

I don't think your having the same problem I was having Parish. If your truck runs, (mine didn't) I don't know if a reflash would do anything for you. The reflash was needed for the thing to work in my case because I was trying to program w/o removing the PCM. I've had about a 70% sucess rate with programing it in the truck. But the 30% that it didn't work was such a PITA I don't do it anymore.

Do you know anyone else with a Edit cable? They should be able to read the PCM. So at least you'll know if its your cable or PCM

Good luck Hope you get it worked out.

 

Maybe I can help. I engineer these sorts of things for a living, although it is for large Class 8 trucks rather than pickups. If you can program a 2001 PCM OK, this tells me your PC, serial port, cable, and data link adaptor are fine. Since you are doing the programming stand-alone and not with the PCM networked with the rest of the vehicle, that rules out interference by other ECU's. Since other people can program 2003 PCM's, that means the software is probably (but not necessarily) OK. This narrows it down to the PCM and possibly the connectors or other factors in the programming environment. Are you using the Speartech isolation cable? Are you removing the PCM from the truck? You might want to check the pins on the PCM for corrosion, dirt, bent pins etc., anything that might give an intermittent connection. Also check out the mating connector. If you are removing the PCM from the truck, try running a wire from the negative pole of your power source to the PCM case, to improve grounding. What are you using for a power source, a battery or a charger? Chargers can have AC ripple which can interfere with signal integrity. GM's version of J1850 is a single-ended (non-differential) system which can be prone to noise caused by bad grounds, noisy power supplies, etc. If all else fails you may have a faulty PCM. The software routines used to flash the memory are different from those used in real-time engine control and OBDII diagnostics, and any intermittent bugs would not necessarily reveal themselves otherwise (in theory they should be detected on power-up self diagnostics, but the diagnostic routine might be overlooking them). Hope this helps a little.

 

is anyone using ver 1.21 software on an 03? i hope to eliminate that as a problem today.

i haven't been completely removing the computer from the truck, i have only pulled off the one conector that goes to the speartech adapter, it is posiable that this is the problem but unhooking both doesn't work either, i may have scrambled the program all ready.

i tried diferent cables where i could, looked at every conector and pin and it is all clean, i am using the truck battery for power.

i want to try version 1.3, if that doesn't help then try a reflash from the dealer and start from scratch, do they do the reflash with the computer out of the truck or in the truck? if they do it intruck then things get complicated since i have the 4l80e swap, not sure if i can drive home without the proper tranny programing.

 

I'd try software before I did much else. It's wierd that it just now decided not to work right. I had something like that happen with my old truck though. It turned out to be some kind of security thing cause if I tried to start it, it would fire, then immediatly shutoff and throw codes. One of the was something with the anti theft thing. For some reason, taking the key out and shutting the door did it and after that, all was good.

I'd still try the software. I'd be interested to know what carputing says about it too.

 

it never has worked right, always been a huge pain and just now it wont work at all.

 

i still say it's the software. parish, i have v1.21 dated 11/21/2002 and i can't even open anything newer than a 2002 file. give me your regular e-mail, i have a copy of 1.3 upgrade i can send you if your e-mail will accept files larger than 1M.