Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G3500, VAN PASSENGER EXTENDED, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 708 (ENTERTAINMENT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDIAGNOSTIC SYSTEM CHECK - RADIO/AUDIO SYSTEMTEST DESCRIPTION
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 F
Test Description
2001 Chevrolet Chevy Express G3500, Van Passenger Extended, 6.5 FSECTION Test Description
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The number(s) below refer to the step number(s) on the diagnostic table.
- 3: Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
- 4: The symptom list in Symptoms will determine the correct diagnostic procedure to use.
- 5: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
Diagnostic System Check - Radio/Audio System
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Install a scan tool. Does the scan tool power up? |
Go to Step 2 | Go to Scan Tool Does Not Power Up in Data Link Communications |
| 2 | Attempt to establish communications with the remote playback device, if equipped. Does the scan tool communicate with the remote playback device? |
Go to Step 3 | Go to Scan Tool Does Not Communicate with E and C Data Line in Data Link Communications |
| 3 | Attempt to establish communication with the radio. Does the scan tool communicate with the radio? |
Go to Step 4 | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications |
| 4 | Select the radio DTC functions on the scan tool. Does the scan tool display any DTCs? |
Go to Step 5 | Go to Symptoms - Entertainment |
| 5 | Does the scan tool display any DTCs which begin with a"U"? | Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications | Go to Symptoms - Entertainment |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.