Duramax Lifetime Supporter
Join Date: Aug 2010
Location: Canal Winchester, Ohio
Front Differential Noise (2004 Tahoe)
As most of you know I sold my 2006 because of a baby on the way. I ended up purchasing a 2004 Tahoe Z71. Price was right, and it looked new and drove great! Has all the luxuries, moonroof, dvd player, leather, heated seats, bose, etc.
Here is my concern. I have the "Auto 4WD" System.
When I driving in 2Hi everything sounds fine. If I put the truck in Auto4WD or 4Hi I get a rumble noise that sounds like a truck with mud tires. Not quite as loud, but it changes tone with speed. It seems to get a little quieter after driving a couple miles (no in 4Hi, but in Auto which is OK to do on pavement).
I've heard the front diffs going to crap is common on the 1/2 ton series GM's. Does this sound like a hub bearing or a differential issue? Everything is quiet in 2WD when the front driveline minus the CV's is sitting still.
2009 Silverado 2500HD
LMM CCLB Allison 6-Speed
EFI Live By Kory Willis