2004 GMC 2500HD DRIVE TRAIN NOISE

HAS ANY ONE ELSE HAD A PROBLEM WITH FRONT DRIVE TRAIN NOISE IN 4 WHEEL DRIVE? I HAVE CONTACTED GM BUT IT SEEMS THEY DON'T WANT TO REPAIR IT. THEY DID CHANGE THE DRIVE TRAIN WARRANTY TO 5-60000. HAS ANYONE HAD THERE
TRUCK REPAIRED ?
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"joedoks" wrote

It depends on what you mean by "front drive train" noise. If you have the auto transfer case, (you should have one button on the dash that says "auto4hi") they do tend to be noisy in both the auto and the 4hi position. Especially on high traction surfaces. Usually, tho, you will notice the noise when you are turning at low speeds.
If you have a growl or whine going straight down the road when you engage 4hi or auto 4hi....you most likely have front diff bearing problems. Since you have the heavy duty version, you would have the large 9.5 inch front diff. On these, we see both the side bearings and pinion bearings failing. On the smaller diff, it's always the side bearings. On the larger front diff, if it's the problem, you will need to have it overhauled, install an updated vent (to handle synthetic fluid) if it hasn't been done yet, and fill it with synthetic fluid.
What do you mean when you say that you contacted GM? Have you taken it in to a dealership and had it checked out?
Ian
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