Getting issues with my Chevy Avalanche 2005 , traction active messsage appears and i cannot move the vehicle for at least 2 to 5 seconds. this can be very dangerous in an interesction. it seems to happen when comming to a full stop and then trying to move once again. it is getting more and more frequent. i have read the posts and some are saying it is a speed sensor others are saying it is the abs sensor. is there any tests i can do to determine the issue ?

SOURCE: abs light on and traction light off

Dear Customer,

if you getting some noise like small twittering than its genuine at high speed braking,

or if you get more noise like hammering once a time in braking tahn you have to check your brake couplers that having some crack or some unbalancing ,

THNX

SOURCE: 2001 olds ABS and traction control sensor issue

An ABS sensor DOES affect the traction control system. Traction control uses these sensors to determine if a wheel is losing traction. A bad sensor will cause both the ABS and TRACTION lights to come on.
The CHECK ENGINE light however is going to be a seperate problem.

SOURCE: abs and traction control light stays on

Cheapest option would be to have the fault code read by a dealer or specialist. Its likely to be a wheel speed sensor but its finding which one that's the problem. You could disconnect each one and take an ohms reading across the connections. They should all be the same or there abouts. Change the one thats not. If your lucky the light may extinguish. If not the fault will need to be cleared using diagnostic equipment.

Cheers John

SOURCE: 2005 GMC Yukon Denali - Traction Control issue

your problem is the front wheel speed sensor. I had the same problem on my 2004 Denali. The GMC dealer felt there was nothing wrong, no codes. I replaced both from wheel sensors (about $75 each on Ebay) and the problem is fixed. The passenger sensor had a crack in it. I saw this solution on a discussion chat. There was a TSB for the 2002 pickup trucks with the same problem. Hope this helps.

SOURCE: 2001 Impala Traction Activates unnecessarily

THE SPEED SENSOR IS LOCATED INSIDE THE HUB ASSEMBLY. THE TWISTED WIRES GOING TO THE SENSORS ARE PROBABLY AT FAULT. THE WHEEL SPEED SENSOR HARNESSES ARE AVAILABLE THROUGH A DEALERSHIP.