Intermittent Noise
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
| Cause | Correction |
|---|---|
| Inspect for the proper gear oil levels prior to performing system diagnosis. Refer to Rear Axle Lubricant Replacement . | |
| Loose propeller shaft mounting bolts | Tighten the bolts as required. Refer to Two-Piece Propeller Shaft Replacement . |
| Worn, loose, or missing differential mounts | Repair or replace the differential mounts as required. |
| Loose torque tube bracket or a damaged bracket bushing | Tighten the bracket bolts or replace the bracket as required. |
| Incorrect type fluid Installation of the incorrect type gear oil may create a "moan" type noise within 7,770-25,900 km (3-10,000 miles). Fluid that is "black" in color is to be considered normal and is darkened by the carbon material in the clutch plates. |
Replace the rear differential assembly as required. Fluid replacement will not correct a "moan" condition caused by the use of incorrect oil. Refer to Differential Carrier Assembly Replacement . |