Code Info ??

[Onebigcanuck]

I recently had the encoder replaced to service the 4x4 service light (CO327)

They also listed coded CO500 & U1026.

What are these codes for ??? :confused:

[Trip]

I can't find those exact codes in my 03 manuals?

[MAV]

With my on line GM service access, I only see the code DTC C0327-Encoder Circuit Malfunction. The others are not listed.