by larryk » Tue Apr 18, 2017 7:03 pm
Hmmm... Tech2 is the GM scan tool. Kind of a super scan tool....
If there is more than, if I recall, a 2% valence between front wheel speed (as measured by the front wheel ABS sensors), and either the rear axle speed sensors (2006+) or transfer case speed sensors (2005-). If your truck is stock, and the front/rear tire sizes are the same, and same level of wear, it's probably a bad sensor....you really need a tech2 to easily ID which one...