Radio Volume Not As Loud After Reprogramming or Replacing Radio - kw performance speaker loud amplifier amp program sound no noise audio

The following diagnosis might be helpful if the vehicle exhibits the described symptoms in the PI.

Owners may comment that after the radio has been reprogrammed or replaced, the volume is not as loud at the same volume setting as before. This only applies to vehicles with RPO "UQ7" without RPO "Y91".

A new "Audio Calibration" part number 10364319 was released to enhance low end volume control resolution. This calibration does not change the upper end of the radio volume control and the volume will get as loud as the old calibration. But the low end volume control has been changed so that each click of the volume control will raise the actual volume at a slower rate then the previous radio calibration. This is normal and no repairs should be made.

.

Please follow this diagnosis 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. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.

(03-04 Chevrolet All Full Size Trucks and Utilities) and (03-04 GMC All Full Size Trucks and Utilities)

.