| Subject: | No Sound From Speakers After Replacing Radio |
| Models: | 2009 Chevrolet Avalanche, Suburban, Tahoe |
| (Equipped with the LTZ Or SLT Uplevel Package) |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
You may experience one or all of the following conditions after replacing the radio.
| • | No sound from radio speakers. |
| • | No blinking sound heard from the turn signals or hazard signals when activated. |
| • | No audio warning chimes heard when a door or liftgate is opened. |
Recommendation/Instructions:
Starting with the 2009 Model year, Certain Full Size Utilities with an Uplevel Package and RPO (STZ) will be equipped with a Low Speed Lan Amplifier. This is different from the previous two years where the only vehicles that were equipped with Low Speed
Lan Amplifiers were vehicles equipped with the Y91 option.
When replacing the radio, make sure the proper RPO's are checked on the vehicle. You will notice that the Y91 option and the STZ option are paired together under the audio and the equalizer tab in TIS-2-Web.
Note: If vehicle is equipped with RPO (STZ), you must select the option that is labeled: For vehicle with UQA speakers and RPO STZ/Y91 to properly program the radio.
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.
