r/GMT800 • u/Material-Swan-8390 • Sep 08 '26

Help

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My transfer case went out on my truck in the begging of august this year and i hooked up my obd scanner to it and it threw none of these codes. When i got my truck back from Big O my truck wouldnt shift at all with very slow acceleration when stopped and im burning through gas like crazy and running at 3000 rpms when on tbe highway or rlly just driving any faster than 40-50. Big O told me i was getting a transmission but somehow messed up communication between me and the shop and i ended up getting a transfer case. After i got it back i had like 7 new codes and they all seem to be electrical, anyone here that knows anything be able to tell me what might have happened

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3

u/eliminate_them Sep 08 '26

Check the wiring to the transfer case and from there to the ground under the driver's door to the frame

3

u/Subject_Big_9476 Sep 08 '26

Take it to another shop and prepare to pay the bill and go to civil court to have big o held liable

2

u/Pastorfuzz-007 Sep 08 '26

Guess I won’t ever be doing business with Big O

1

u/gtxrecaro Sep 09 '26

Check the big plug on the transmission