2006 sierra abs and park light on

[Amber Corzine]

Changed the wheel speed sensors on both sides and the one for the transmission. It is still on and doesnt shift right and the speedometer is still erratic. Tried unplugging battery and left overnight to see if it would erase the code. Still nothing. Checked all the fuses and everything is good. Anyone know what else could be checked besides having to replace the abs module?

[riverbanks]

Probably have to scan it, with a good scanner,p codes aren't enough from a reader,got to see "u" and "c" codes,that helps a lot,other than that, check ground wire at frame under driver's door on cab mount

[Amber Corzine]

Thanks! I will try that

[davester]

It's also common for the ground to the abs controller to not be great.  It's located on the "wing" hanging off the frame, under the cab underneath the driver's side door.  There's a number of wires bolted to the frame there.  Unbolt them, clean off the frame on that spot and the connectors, bolt them back down and put a bit of dielectric grease over them.

[Amber Corzine]

3 hours ago, davester said:

It's also common for the ground to the abs controller to not be great.  It's located on the "wing" hanging off the frame, under the cab underneath the driver's side door.  There's a number of wires bolted to the frame there.  Unbolt them, clean off the frame on that spot and the connectors, bolt them back down and put a bit of dielectric grease over them.

That's what is next, deleted the code off with the code scanner it worked for a few minutes, drove it and came back on and started doing the same. I guess all that's left is the ground wire.