Screwin around with EFILive today and was just looking at the codes, and I got C0035, C0040, C0050, all of which are ABS wheel speed circuit codes. The first two im assuming are just the speed censors in the front wheel bearings. The C0055 is located where? Is it the speed censor on the transmission?

Thanks,
John

The C0035 and C0040 codes indicate a problem with the left and right front ABS sensors. I got these codes after replacing my front wheel bearings (4WD). According to my dealer this often happens when using non-GM aftermarket bearings. Not to worry. Just 2 days ago I needed to panic stop from 75MPH. The anti-lock worked perfectly. Hope this helps.