Intermittent Buzzing Noise
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
| Condition | Action |
|---|---|
| Low fluid level | Add fluid to the proper level. Refer to Transmission Fluid Check . |
| Air leak in oil suction filter canister | Replace the oil suction filter. Refer to Oil Pan Replacement . |
| Clogged suction filter | Replace the filter. Refer to Oil Pan Replacement . |
| Aerated fluid causes noisy pump | Correct the fluid level. Refer to Transmission Fluid Check . |
| Low main pressure causes main regulator valve to oscillate | Refer to Low Main Line Pressure in All Ranges and Low Main Line Pressure in Specific Ranges, Normal Pressure in Other Ranges . |