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Transfer Case Encoder Motor

LtE-36

By LtE-36
in Ask A GM Technician

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LtE-36 Enthusiast

LtE-36

Posted
Posted

My 4 wd service light came on in my dic.

First the abs /brake light was on for a few days, the tech at the dealer said the module was unable to establish communication with thier scanner, and said the module would need to be replaced.

 

two days later when we pulled the code for the 4wd it was C0306 trans case encoder motor internal failure,

My question is this a seperate issue or did the computer disable my 4wd due to the abs problem?

 

I have sent the module to module master for rebuild, I was just curious if they could be related so I might avoid the $771 bill to replace the encoder motor. I have looked all over the net to find prices on the encoder motor but they say there is a different model for the 03 and that is why the prices are high. Oh it has the 2 spd electric button shifter, w 263hd gm transfer case.

Thanks

Jim

FYI THE ground wires were removed and cleaned also ,then the 4wd service light came on .

LtE-36 Enthusiast

LtE-36

Posted
  • Author
Posted
My 4 wd service light came on in my dic.

First the abs /brake light was on for a few days, the tech at the dealer said the module was unable to establish communication with thier scanner, and said the module would need to be replaced.

 

two days later when we pulled the code for the 4wd it was C0306 trans case encoder motor internal failure,

My question is this a seperate issue or did the computer disable my 4wd due to the abs problem?

 

I have sent the module to module master for rebuild, I was just curious if they could be related so I might avoid the $771 bill to replace the encoder motor. I have looked all over the net to find prices on the encoder motor but they say there is a different model for the 03 and that is why the prices are high. Oh it has the 2 spd electric button shifter, w 263hd gm transfer case.

Thanks

Jim

FYI THE ground wires were removed and cleaned also ,then the 4wd service light came on .

Anyone ???? Nobody has had these problems ???????

ChevyTech007 Enthusiast

ChevyTech007

Posted
Posted

A good possibility is the sensor in the encoder motor. Not to bad to change, just make sure the transfer case is in neutral before removing the motor. Much cheaper than the whole encoder motor. I think there is an update program for the transfer case module. Have your dealer check for updates.

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