Ok I tried changing some setttings on my 91octane tune and it messed up and now the truck is in limp mode and diablo tech told me I have to have dealer rewrite my pcm and tcm.... the tech was help full and understanding I am in no way upset with tech support I was just hoping one of you have a mother way maybe I can rewrite it with the tuner?
The tuner itself needs to be reset too but the tech will help with that when I get it rewrote....
The truck is 2008 GMC Sierra 5.3 LC9 motor
Any other help would be great thanks guys
Having dealer rewrite pcm and tcm
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Richiefcknrich
- Posts: 19
- Joined: Fri Apr 21, 2017 10:24 am
Re: Having dealer rewrite pcm and tcm
Ok the elm and Tom are back to factory.... but now the tuner screen go white after it's been plugged in ...... the tuner boots up but about 30 seconds after it's booted up it goes to white screen..... any one else have this happen?
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Richiefcknrich
- Posts: 19
- Joined: Fri Apr 21, 2017 10:24 am
Re: Having dealer rewrite pcm and tcm
Ok I let the tuner boot up and go to white screen and let it sit this morning for about 45 mins...... white screen gone and back to the reset code.... sent pic of reset code to tech email he sent back the code to reset it and all seems good .... tuners back to normal home screen .....
Just wanted to update in case any one else runs into this
Thanks
Richie
Just wanted to update in case any one else runs into this
Thanks
Richie
Re: Having dealer rewrite pcm and tcm
something's wrong with it.. most likely have to send it in to diablosport to get repaired.. You can contact Diablosport Tech Support at [email protected] or 1-561-908-0040 for tech support... Mon-Fri, 9am-5:00pm (EST).
06MonteSS / DiabLew Tune

2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net
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Richiefcknrich
- Posts: 19
- Joined: Fri Apr 21, 2017 10:24 am
Re: Having dealer rewrite pcm and tcm
Do I need to .... after I did the code I have plugged it in a bunch of times and no white screen.....
Re: Having dealer rewrite pcm and tcm
ok.. so if it's working fine now after the reset, then no..
06MonteSS / DiabLew Tune

2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net

2014 Camaro SS - 2SS, RS pkg., short-throw shifter, NPP perf. exhaust, BMR strut-tower brace, Cold Air Inductions cold air intake
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com -- www.diablocustomtuning.net
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Richiefcknrich
- Posts: 19
- Joined: Fri Apr 21, 2017 10:24 am
Re: Having dealer rewrite pcm and tcm
06montess can I keep a battery charger hooked up while I do the tune? Maybe my voltage dropped to low?
Thanks
Richie
Thanks
Richie
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Richiefcknrich
- Posts: 19
- Joined: Fri Apr 21, 2017 10:24 am
Re: Having dealer rewrite pcm and tcm
Updated the tuner which took about 40 minutes, hooked up my battery charger and put the tune back on the truck and it worked great!
Thanks for the help here and the techs that where emailing with me to help fix my issues!
On a side note hook the battery charger up that way if lights come on or you take a little bit adjusting things you don't feel rushed because of a voltage drop.....
Thanks for the help here and the techs that where emailing with me to help fix my issues!
On a side note hook the battery charger up that way if lights come on or you take a little bit adjusting things you don't feel rushed because of a voltage drop.....