Brake Moan Hoot Noise - keywords disc drone front moan pad rear rotor squeak
| Subject: | Brake Moan Hoot Noise |
| Models: | 2003-2006 Cadillac Escalade Models |
| 2003-2006 Chevrolet Avalanche, Suburban, Tahoe |
| 2003-2006 GMC Yukon, Yukon XL, Yukon Denali Models |
| 1500 Series Only |
This PI is being updated to add 2006 model year. Please discard PIT3285A.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Owners may comment on a brake moan, hoot or fog horn type noise from the brakes. This concern may be somewhat difficult to duplicate and only happen after the vehicle is driven for a period of time (20-30 miles).
After the vehicle has been driven and when the brakes are applied between 20-40 mph, if the brake pedal is lightly released, the noise is most audible. The noise may sound like it is from the front, when in fact it is from the rear brakes. Inspect the rear brake rotor surfaces for scoring or grooving pattern which may look like a vinyl record album.
Recommendation/Instructions:
To correct this concern machine the rear rotors and block sand the pads.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
