hey guys,
I have a 99 1500 4x4 with the 5.9 liter. and a couple days ago when was driving i noticed a rattling noise coming from the front end. This noise isnt constant though. It seems to only happen when accelerating or on a hill. it seems whenever there is a strain it rattles. I have had friends tell me that it probably is the wheel bearings. idk if this is true or not. Any help would be great! thanks

 

Is it louder at a particular speed? Is it a clunk? It's best to jack the front end up and start looking for things that are loose. To check the bearings after you have the front jacked up put 1 hand at 11 or 12 o'clock and the other at 5 or 6 o'clock and try to rock it back and forth. It shouldn't move. When mine went out my wheel was leaning in at the top bad.

 

Could you get a vid of it?

Sounds like it could be spark knock. In my experience, a rattle due to a loose part only happens when I hit a bump, or it's there at all times. The fact that it is engine load related points to an engine issue.