Abs Light came on

[Nick2000Gmc]

So here is what happened, I went to get in the truck started it and it showed no light, then when I drove up the street at about 5km/h it came on. I was suprised of course, so I stopped and let the truck idle a second, then shut it off. Again it restarted with no light, but once I started rolling it came on again. I can start it and no light comes on till I start moving. I have had my speed sensors cleaned before and can problay rule that one out as it never set a code ( I do live in the salt belt thoug) anyways if someone has any thoughts I would appreciate it.

 

My truck

 

2000 gmc Sierra ext cab 4x4 5.3 l it has 120,000 km and is bone stock.

 

Any help appreciated ( even some guess's on what it might be would be great)

[asilverblazer]

Sounds like a speed sensor of some sort, possibly the "Vehicle Speed Sensor" isn't agreeing with the wheel speed sensor? Best bet is to go to the dealer for the code. (While the light is on.)

[Nick2000Gmc]

Thanks Silver Blazer I'm not covered under warranty and in my city there is only 2 dealers and neither is very good. I will take it to my mechanic, had to many bad experiences with the Stealer, wish there was a good one here