SERVICE NUMBER 12602801 - HARDWARE NUMBER 12597116. But you will receive one that looks like the picture and fits in your vehicle. Most issues can be avoided if you provide us your vehicle's OEM part number, VIN number and mileage during checkout.
When I got it I got it hooked up I did everything it was supposed to do but where the computer plug goes into the ECM it was chipped. So you can tell it was an older unit. I hope I don't have problems in the future with water getting by it.
ECU arrived packaged well. ECU looked like it was new even though they are reprogrammed unit. After installation, I followed relearn procedure provided with the ECU. Vehicle started right up and has been driving fine. Hopefully, I will never need to purchase another ECU for my 2005 GMC Safari again. But if I do, I would purchase from Autocomp Technologies again.