this dtc has popped up about a month ago, and i cannot figure it out. my truck is an 07' classic crew, 4.8/4l60e/drum brake rear. this dtc c0055 is for both rear wheel speed sensors- inwhich my truck isnt equipted with from factory, it only has the vss (vehicle speed sensor) on the trans. i just had the trans rebuilt last week and a new vss installed (planetairy gear broke) and this didnt remedy this dtc. im not sure how to attempt to diagnosis this issue- i cant find much info online for this dtc. does anyone have access to gm flow chart for this dtc? or had anyone dealt with this dtc before? any help would be greatly appreciated!!!

 

Are you having any problems with the transmission shifting properly? Any problems with the speedometer not working? Have you changed axle gear ratios? Is the truck 2 or 4 wheel drive?

Send me a PM with your fax number & I'll send you the diagnostic chart.

 

speedo works fine, truck has stock 3.23 gears, trans shifts fine, and works fine- as best to my knowledge. its a 2wd truck. i was able to get the diag chart for this code today from a tech at my local chevy dealer. and after i explained what was going on- he said that the circuit between the ecm and ecbm seems to have either a bad connection (corrosion at pin/plug) or wire is damaged or broke. i may have to run a new wire

 

i currently dont have a working fax. having some internet/phone issues also- so my fax is down at the moment

 

also, my truck had the dtc- c0035(left front wheel speed sensor). i replaced the hub assembly today and cleared the dtc's, drove for few miles, all dtc's came back up! i think i have gremlins in my electrical system!

 

If you replace the wires all the way back to the source you need to run them both and twist them together to create a shield. Minor electrical interference can cause issues.
Check for harnesses close to plug wires to.

 

are these wires in this circuit only twisted together or shielded also?

 

i also have a dtc c0035 (left front wheel speed sensor). according to this information i keep finding- i need to diag this problem first. so i was able to start checking the wiring between the lwss and ebcm. the circuit isnt shorted to ground on either side, but seems to be shorted to each side of the circuit. i had disconnected both harnesses from either ends (wss & ebcm) and began checking resistance in the circuit, but before i got to check the resistance on each wire- i found that the circuit is "closed" without being connected at either harness...? not sure if im reading my meter right or its the shielding causing my meter to give me a fause reading...? gonna try again when it quits raining- seems every time i get started on diag this issue, its starts raining on me! gotta love south louisiana weather! haha

 

also, i did replace the complete wheel hub assembly- hoping that was my remedy for this c0035 dtc, but no luck there!

 

you may have to go to gm on this bud. my step brother had 08 4.8 did some werid **** and it end up he needed a new harness and they replace it under warraty