Got myself in a bit of a predicament. Bought a 07 classic ext cab 4x4 lbz (my dream truck) last week. It came with a straight pipe and efi live with the dsp5 switch on it. Previous owner had it installed by a shop instead of buying the autocal device with the tune loaded on it which means I have no way to put it back to stock. I planned on having my "smog guy" take care of this issue but he can't even get through the efi live in the ecu. I've got the stock exhaust with the cat but no way to get ecm back to stock. Any one have any ideas? Can I buy a autocal device with a stock tune loaded on it so I can smog this thing?This is my first diesel so I'm clueless. I also have know idea what my 5 tunes are on the switch. 1 is definitely the hot rod tune but 2-5 feel the same for the most part. Dealers and a few local shops said trying to remap the stock tune over the efi tune usually doesn't end well and can smoke the ecm. At this point I would be totally fine leaving it stock. Less **** to go wrong and I don't need the extra HP for anything just towing a boat. Any help would be much appreciated. Losing sleep over this.
New to me LBZ w/ efi-dsp back to stock-no autocal
- Thread starter Bunger
- Start date
All 3 dealers I called today said they can do it but there’s a chance it can wipeout the ecm? I guess because there trying to flash over the efi tune.
Is it possible to buy a autocal
Device with the stock tune on it, plug it in, remove the tune on my
Truck and save it in the autocal the insert the stock tune onto the truck?
Give the guys at SoCal Diesel a call, I've had great luck with them. http://shop.socaldiesel.com/
Lorenzo and Gabe are super helpful.
Where are you located?
You cannot save the tune from your ecm onto an autocal then later flash it back on. Autocals don’t work that way. And lbz dsp5 tunes cannot be read.
The only way to get an autocal to work with your truck is to purchase new tuning with a stock tune and a dsp tune from the same tuner. Then you can flash between the 2 tunes that came on your autocal.
You cannot save the tune from your ecm onto an autocal then later flash it back on. Autocals don’t work that way. And lbz dsp5 tunes cannot be read.
The only way to get an autocal to work with your truck is to purchase new tuning with a stock tune and a dsp tune from the same tuner. Then you can flash between the 2 tunes that came on your autocal.
oops forgot LBZ and LMM you can’t read out a dsp5Oh ok gotcha. Figured it wouldn’t be that easy. Now my other hurdle, living in California is going to make it a challenge for me to be able to buy EFI live from a tuner correct? Or can I at least buy it with just the stock tune on it for now and then by other tunes down the road if I decide to go back to EFI live? My biggest thing right now is just getting it to pass smog is there any difference between having the dealer flash it back to stock or using an auto CAL with a stock tune on it to put it back to stock?
I thought about that also. There online from 150-1200$ what’s a reputable place I could get one from?
To get a stock ECM? Call up your local scrap yard, put it in the truck, take it to GM, and have it reflashed to your VIN.