deepstuff

Hi, I have a NBS 2007 Silverado 4x4 vmax. It has had a blackbear tune for years. I recently lost communication with TCM. I replaced the TCM with a 2009 from a wrecker. I know have communication and gear indication etc... back. I tried loading my blackbear TCM tune using AutoCal but get an operating system error ($540) on my programmer. I believe this is because I have a 2009 tcm and not a 2007? Does the tcm need to be reprogrammed to work correctly in my truck? Can the 2009 Tcm be reprogrammed to 2007 configuration and then loaded with Blackbear tune? Tks.

Not to burst your bubble and I hope you're problem is fixed... Don't go to far in the woods without a budding in a Dodge. From experience 3-days in not long enough to tell - just enough to make it really fustratingnext time it happens. Anyway, went out this morning and the horn beeped twice when I unlocked the doors with the key fob. I then purposly just turned my key to the "on" position not to start. To my surprise the radio clock was already reset t0 12:00. I then turned on the head lights and heated seats and checked for voltage drop accross my cables with the engine still not running but key on. From positive battery to other side of mega fuse zero voltage drop. From negative battery to block and from neg battery to Alternator casing 0.4volts. With truck running the .04 volts went to .08volts. It was dark so I couldn't get right on the block end of the cable but was making good connection with the block and Alt casing. I never tried from Positive battery to frame or body but will the next time. I'll be checking my grounds next including one under drivers door. MAybe even change the ground cables. Its fustrating when I can't trust my truck.

Is your fix still working? It all just started on my 2007. First I had it momentarily shut down and cycle all the gauges and door locks and shut of headlights at highway speed. It came back on its own. Now having trouble starting. Leave it for a while or turn key second or tenth time and it fires right up. I've changed the battery, and it was good for a few days now I have the starting issue again. I've checked the wires and they seem fine? Mega fuse is good, ground to block is good, Connections to mega fuse and fuse box is good. ????