ABS light problems/Transmission problems/speedometer problems

redneckred
Tue, 01 Mar 2022 21:24:28 +0000
Maintenance/Repairs

I have a 2008 Silverado 1500. I started having problems with the transmission out of the blue not wanting to shift out of 1st gear when taking off from a red light or just taking off. I could manually shift to 2nd but that was it. Pull over, shift to park or just stop and it would miraculously fix itself. Next, started getting ABS light with no apparent symptoms while sitting still. Got to noticing that while this was going on, the speedometer would be bouncing from 0mph up to 10mph while sitting still. Take off and no more bouncing. I was going through a drive through yesterday, and noticed when easing on and of the brake I could feel the brakes grabbing and letting go while easing up in the line after the ABS light came on sitting still in the drive thru. Finally realized by OBD code reader could pull the ABS codes and got a U0073-00 and a C0055-5A. The first is a generic the ECM can’t connect to another device (not specific) from what I could find. The second is telling me the rear ABS/Speed sensor is sticking open or shorting out. Correct me if I am wrong, the bad sensor would be causing all of my problems and the 2 codes are actually related? New sensor, problems solved?

16 posts - 7 participants