I was tuning a 04 2500HD with a 6.0 and the only way I could flash it is if I would uncheck the high speed box. It still flashed in about 30 secs but it would not flash unless I unchecked that box. Has anyone seen this before?
I was tuning a 04 2500HD with a 6.0 and the only way I could flash it is if I would uncheck the high speed box. It still flashed in about 30 secs but it would not flash unless I unchecked that box. Has anyone seen this before?
Did it have OnStar?
2009 Z06 LS7 / 2008 Sierra Denali AWD L92 6L80E
Flashing control modules since 2001. 8-)
Who needs a MAP sensor on a supercharged LS6 anyway.
I cannot flash my SS in high speed. I used to be able to, but for some reason no longer. If I try, it will go extremely slow, perhaps 1k every 3 seconds.
I also have problems doing a read flash with it. It will reset the gauge cluster 2 or 3 times while doing the read flash, acting like it is going to crash... It's not my PCM, something with the wiring, as I have had to slow flash 3 pcms using this wiring.
I recently tuned a 2005 HD 6.0L with no problems.
2000 Silverado Full Size 4x4: Forged 6.2, H/C F1R Procharger
98A4 Z28: 02 PCM H/C Forged 347, 9" Moser 3.73
V1 V2 99+up RR COS #5 OLSD Dual Stg N20
www.efialchemy.com
www.greatamericancarwar.com
I dont think it didOriginally Posted by SinisterSS
Originally Posted by dc_justin
yep thats exactly what it does
I'm wanting to do a full flash to Custom OS3 soon on it, but I'm afraid that I'll get started and never be able to finish the flash...Originally Posted by minytrker
disconnect the battery first.. That really helps
Are you guys running the latest tuning software? I flashed my SSS about 10 times the other day without any issues.
Justin, for a fellow SSS owner, send your PCM to me and I'll bench-flash COS3 for you - just cover shipping.
2009 Z06 LS7 / 2008 Sierra Denali AWD L92 6L80E
Flashing control modules since 2001. 8-)
Who needs a MAP sensor on a supercharged LS6 anyway.
Originally Posted by SinisterSS
Thanks for the offer Sinister, but I should be fine. I am going to get a bench harness pretty soon. I'd really like to get the wiring issue figured out though, so I'm going to be looking into it some more.
I am completely up to date on my software. Strangely enough, I'm thinking mine has to do with the Kenwood deck I have, more specifically the door chime module, as it will emit random static sounds while the tune is being flashed... Either that or something with my ground wires for the intercooler pump. I'll have to play with it and see what I can find.
To make you feel better, I had it lock up on me once during a normal flash and efi was able to recover it using the slower flash with no problem. I have another pcm here for that truck I am thinking about throwing it in just to see if its the truck or pcm.