This may sound stupid

Nicholas Roads · February 1

Not sure if I posted in the right place or not. But, this may be a stupid question that I’ve already answered for myself. Either way, I’d like some other input. I have a 2006 Chevy suburban that was having some issues. I ended up changing the pcm to which it fixed the original issues but now I have no power to the 4x4 actuator and the transmission won’t shift. The pcm was bought second hand from a salvage yard, the numbers all matched. But I’m wondering if it’s possible that the pcm came from a 2wd suburban/yukon and not a 4x4. Or would it even matter if it were and should I be looking else where for another problem. Any advice would be very much appreciated.

newdude · February 1

12 hours ago, Nicholas Roads said:

Not sure if I posted in the right place or not. But, this may be a stupid question that I’ve already answered for myself. Either way, I’d like some other input. I have a 2006 Chevy suburban that was having some issues. I ended up changing the pcm to which it fixed the original issues but now I have no power to the 4x4 actuator and the transmission won’t shift. The pcm was bought second hand from a salvage yard, the numbers all matched. But I’m wondering if it’s possible that the pcm came from a 2wd suburban/yukon and not a 4x4. Or would it even matter if it were and should I be looking else where for another problem. Any advice would be very much appreciated.

Did you have the PCM programmed? Needs to be programmed at the dealer to your truck.

swathdiver · February 6

On 2/1/2024 at 12:17 AM, Nicholas Roads said:

Not sure if I posted in the right place or not. But, this may be a stupid question that I’ve already answered for myself. Either way, I’d like some other input. I have a 2006 Chevy suburban that was having some issues. I ended up changing the pcm to which it fixed the original issues but now I have no power to the 4x4 actuator and the transmission won’t shift. The pcm was bought second hand from a salvage yard, the numbers all matched. But I’m wondering if it’s possible that the pcm came from a 2wd suburban/yukon and not a 4x4. Or would it even matter if it were and should I be looking else where for another problem. Any advice would be very much appreciated.

Gotta have it programmed, you can do it at home with the right tools and subscription. Part number is just for the hardware.