1999 blazer abs code co236

i have a 1999 chevy blazer abs code CO236 keeps coming back, even after i replaced the rear wheel speed sensor on the transfer case any suggestions would be very helpful

Any other codes?
There is more than on speed sensor on transfer case.
Which one did you replace?
Have tiy checked out the wiring?

Is the VCM getting a good speed signal?

The ABS computer gets the rear wheel speed signal from the VCM.

Read out the engine computer and the abs brake computer and see where it is losing signal.
If VCM is getting a good speed signal and ABS computer is not picking it up check the out put speed signal from VCM to ABS computer.

A good repair manual repair flow chart for that code should take you threw the test and repair for that code.
Let us know what you find.
Good Luck