Reduced Volume - One or More Speakers. Chevrolet Tahoe - 2WD 2004

GM Service Manual Online

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2004 🢒 Tahoe - 2WD 🢒 Accessories 🢒 Entertainment 🢒 Reduced Volume - One or More Speakers

Reduced Volume - One or More Speakers W/O UM8

Step	Action	Yes	No
Schematic Reference: Radio/Audio System Schematics
1	Did you perform the Diagnostic System Check-Entertainment System?	Go to Step 2	Go to Diagnostic System Check - Entertainment System
2	Turn ON the ignition, with the engine OFF. Turn ON the radio. Adjust the radio balance and fade controls to each speaker. Do all of the speakers operate properly?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Turn the ignition ON, with the engine OFF. Adjust the volume level. Test the appropriate speaker output circuits of the radio for A/C voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did the A/C voltage fluctuate with the audio output?	Go to Step 4	Go to Step 8
4	Turn OFF the ignition Disconnect the radio. Test the appropriate speaker output circuits of the radio for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 5
5	Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 6
6	Inspect for poor connections at the harness connector of the appropriate speaker. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 7
7	Replace the speaker. Refer to Speaker Replacement Reference . Did you complete the replacement?	Go to Step 9	--
8	Important: Reprogram the radio. Refer to Service Programming System (SPS) in Programming. Replace the radio. Refer to Radio Replacement . Did you complete the replacement?	Go to Step 9	--
9	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Reduced Volume - One or More Speakers W/ UM8

Step	Action	Yes	No
Schematic Reference: Radio/Audio System Schematics
1	Did you perform the Diagnostic System Check-Entertainment System?	Go to Step 2	Go to Diagnostic System Check - Entertainment System
2	Turn ON the ignition, with the engine OFF. Turn ON the radio. Adjust the radio balance and fade controls to each speaker. Do all of the speakers operate properly?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Turn the ignition ON, with the engine OFF. Adjust the volume level. Test the appropriate speaker output circuits of the radio for A/C voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did the A/C voltage fluctuate with the audio output?	Go to Step 4	Go to Step 8
4	Turn OFF the ignition Disconnect the radio. Test the appropriate speaker output circuits of the radio for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 5
5	Inspect for poor connections at the harness connector of the radio. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 6
6	Inspect for poor connections at the harness connector of the appropriate speaker. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 7
7	Replace the speaker. Refer to Speaker Replacement Reference . Did you complete the replacement?	Go to Step 9	--
8	Replace the radio. Refer to Radio Replacement . Did you complete the replacement?	Go to Step 9	--
9	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2