If you have front wheel speed sensors, then you have 4WAL.

Need to get the codes read, and see what it is whining about.

 

Not sure about the sensors on the front. I do know I changed the one in the back on the differential.

 

RWAL trucks just have a dump valve. Basically, an aluminum block with two solenoids on it. 4WAL actually has the motor-controller......

 

Do you see a wire running to each front wheel hub? If yes you have 4WALB and a bad wheel bearing can cause an ABS code. Before you do all that get the codes

 

Sad thing is I've already done all that.

There is 2 line going to each rear tire but I only see the 1 on the front ones.

What I've got now is tire wearing awful on the outside edge and this roaring noise that is getting worse by the day.
What I need is the wheel hub assembly correct? Or just the bearing? I'm a little lost on this one.
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What do you mean 2 line and one line?

 

Are there electrical connections to the front hub/bearing units?

 

There is the brake.line and another line going to back and I only see 1 in front. I'll have to check it all again when I go back out.

 

I would raise the front of the truck and check both wheel bearings. On my '02, the noise was coming from the L.F. bearing. Checking both I found that both were bad and the right one was worse than the left.It had worn so much there wasn't enough metal to grind. I'm lucky it didn't fall off. The P.O. had a serious lack of maintenance. With the truck in the air, wiggle the top and bottom of the wheel. I'll bet they're both loose.

 

Thank y'all so so much! Waiting for the bearings to come in so I can just replace both now. My luck is that this morning come outside to a dead alternator! Got it running long enough to get me to the parts place but I ended up changing it in the parking lot! Lol good times