Multiple Transmission Codes

[kshort]

I warmed up the pickup this morning only to find it in limp mode. I drive a 2007 LMM Duramax/Allison 6 speed extended cab/long bed (new body style). I haven't had any recent problems with it. The codes I pulled were:

PO751 (shift solenoid A)
PO756 (shift solenoid B)
PO761 (shift solenoid C)
PO894 (transmission slipping)
PO700 (transmission control malfunction)

I didn't clear any of the codes, but after pulling the codes, the truck actually drove fine after starting the truck again. Could this be a simple transmission filter change, or should I be concerned? I have never actually came across anyone who had an allison problem because of all the build in safety features. however, I do know the possibilities are there. Where should I start looking to troubleshoot exactly what is going on? Any help and advice is greatly appreciated.

 

[Mike L.]

Check your batteries.

 

[kshort]

thanks for the reply! I reset the codes and it through them again. I have replaced the batteries. It appears to only throw the codes on the first cold start. This morning it appeared to have locked up, the codes were thrown and the truck would not shift into drive or reverse, nor would the steering wheel turn. After being shut off for about 15 minutes and started back up everything seemed to be fine. I am at a lost. does anyone have any idea or suggestions that might help me solve this problem? It appears to only happen on the first cold start after the pickup has been sitting over night.

 

[CarolinaHD]

As stated before check your batteries. Alot of weird stuff will happen to these trucks when the batteries are even just a little low.

 

[kshort]

I replaced the batteries. The batteries are brand new,i replaced them last night around 6pm central time and started it this morning around 7am central time.