Well, turns out its a bit more complicated if I actually want to read it... To make it difficult to just slap it in a flash reader GM actually got a custom package marked as a standard 56 pin SSOP. BUT, its the size of a 70 pin SSOP package with the same lead pitch, but with pins omitted, so it wont...

Sooo... Im starting a new project. I have a Malibu Maxx thats gutted that Im swapping a SC LSJ 2.0L into. Right now Im looking to see what PCM I want to run. I opened up the '04 3.5L PCM and it still has the Intel 28F800 Flash (but in a SSOP package with smaller pitch leads). What year did they fina...

GM actually does include all the needed code in some of the PCMs to do full reflashing. Its used for the "blackbox" recorder that takes a snapshot of the vehicle telemetry in the event of a crash (good thing to get rid of if you plan on breaking the law! :lol: ) But, I suspect the download...

Looks like actual comms will have to wait until I can whip up something in C#. Just for yucks tried the advanced mode in my LS1 Flash app to enable it but forgot that it does some background processing specific to the VPW. Got to see the AVT do some really weird things that aren't in the manual when...

Ah ok thanks guys. Yeah that and thubming thru the GM LAN standards shows its more involved than just connecting, setting the address, and watching the network. The 500kBaud sort of makes sense as well since it looks like I will need to specify that when going onto the network. I guess the 83.3kBaud...

Have some questions about actually connecting to the CAN bus on one of these things. Its two-wire CAN and the data rate with just the thing on the bench harness looks to be 83.3kbaud from the scope. The snap-on hooks up to it without issue, so the problems are on my end configuring the AVT-852 I hav...

This is a stand-alone app that can reflash both the calibration as well as the OS on a '411 type PCM. This works with the AVT-852 and provides a simple interface to reflash the PCM. To handle reflashes, the app will require a full 512k bin to work with, and to start you can simply select the downloa...

Thats perfectly fine, and I can certainly relate to the time constraints ;) At this point we have 3 parallel efforts. All the information needed is here between the posters in this thread. I propose that we combine the efforts so theres not a lot of duplicated work that doesn't need to be. How its d...

Im actually working on something similar for the AVT-852. I have a basic interface written in visual C# and have the basic foundation to interface with the AVT and send/recieve data, communicate with the PCM, etc. But, I still need to write the bootloader (know CPU32 well enough to do it) and comple...

I havent actually seen anything directly that requires the use of 4x AFAIK. Since there is no native program in the PCM to handle a full reflash (code must be sent, and then request that the PCM execute the code) you can use any method you like once the PCM has handed over execution control. If your...