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03 2500 Hd Dtc Code B1055

m_livingston61

By m_livingston61
in Ask A GM Technician

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m_livingston61 New Member

m_livingston61

Posted
Posted

I have a 03 GMC Sierra 2500 HD and am getting the "service 4wd" light. I just swapped out the transfer case becuase it got the hole in the case from the pump wear. I have a hypertech power programer and found the following codes. C0035, C0040, and B1055. I found the C codes (speed sensors on front wheels). I can't find the definition for the B1055 code. My question is what iS B1055??

redvett Senior Enthusiast

redvett

Posted
Posted

B1155 - SDM Calibration Mismatch. Has this vehicle been in an accident that the air bags deployed? If so the SDM is the problem.

 

I have a 03 GMC Sierra 2500 HD and am getting the "service 4wd" light. I just swapped out the transfer case becuase it got the hole in the case from the pump wear. I have a hypertech power programer and found the following codes. C0035, C0040, and B1055. I found the C codes (speed sensors on front wheels). I can't find the definition for the B1055 code. My question is what iS B1055??
gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

mike..

 

do not freak out about this ....clear the dam code and go for a drive ,in 2 ign cycles (turn iff ign for 5 min ) and drive it again,, you are going to be verifing if the code is CURRANT or not ...

 

if not ,have a good day ,,,,,

 

 

(some codes need 2 ign cycles after clear to run and pass/fail.)

 

just realized that a U code is not a B code ,please someone get their shit together on the code ...

 

 

either way confirm the code

m_livingston61 New Member

m_livingston61

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Posted

Thanks for the help guys. I have cleared the codes and they come back in after about 10 miles. I did it twice. It puts the 4wd into protect mode and won't move out of 2wd. If i stop and turn the truck off and back on, it will operate normal until the "service 4wd" comes in again. I have read (on here) about some guys needing an "update" for the trucks computer. I will take it down to dealer and see if they can do an update. Thanks again for the help and I will be back. :P

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