Ok so i have a 2006 4x4 crew cab dmax turbo back 4in magnaflow and juice with atitude prog. and its been a good truck till now I tow a 35 ft 5th wheel bout 12k pounds and recently started heating up on steep grades the tap up down shifting on manual mode stoped working and the edge reading out a bunch of codes. like not what the excact code is right now have to go look but what they read out is system voltage low, tcm input voltage low, tap up and down circut low(P0826, P0827) and such gave a total of 7 codes(yikes) Should i be worried??? Anyone know what could be causing this?? had a dog a few years chew through the wiring harness and gm fixed and put new one. could this be a huanting of that incedent?? worth fixing or should i run down and trade up asap?? Help!!

 

Low voltage sounds like a connection issue. I've heard of dogs eating homework, but chewing through a wiring harness is even more bizarre!

I'd get that checked out, doesn't sound like the tranny is actually messed up, just an electrical issue. Good luck man that's all I got!

 

hey man i have the same problem with my ext cab if you find a solution please share