So, tooling down the road anf the SE Icon pops on; all other gages and readings are normal. Push the Reset button and no readout. Stop the car, turn off the ignition and the readout proclaims, "Charging System Failure".

Does this mean the Alternator is malfunctioning as the voltmeter reads 13.7 volts and the mileage is 7300. Car has beem in operation since last January. Chevy dealer says bring it in; still under warranty.

Opinions or comments.

 

Pull the codes and post them:

http://www.stengel.net/diccodes.htm

 

Thanks for the info on code recovery.

Here is what I got:
10 PCM-PO 455H
60 IPC-BO 516H

Neither of these 2 codes are in the list.

All other modules displayed no codes.

Comment???

 

I'm no expert but I think that the volt meter should read above 14 while driving. Yes?

 

Not sure what is going on.
Make sure there is no "C" after the "H" in your codes you displayed. That means the codes are in history are are not current. My usual voltage at highway cruise id 14.4 V

Here is B0516H.. I can't find P0455H
B0516H:
CIRCUIT DESCRIPTION
The Instrument Panel Cluster (IPC) receives vehicle speed information from the Powertrain Control Module (PCM). The IPC receives a 4000 pulse- per mile Vehicle Speed Sensor (VSS) input over a dedicated input from the PCM. The PCM is responsible for processing the VSS data and sending it to the IPC. The IPC will only display the calculated VSS data that was sent from the PCM. The PC monitors the VSS output information sent from the PCM for an out of range condition.

CONDITIONS FOR SETTING THE DTC


The IPC detects vehicle speed information sent from the PCM over 322 km/h (200 mph) on the vehicle speed sensor signal circuit.
Condition must be present for 1 second .
ACTION TAKEN WHEN THE DTC SETS


Stores a DTC B0516 in the IPC memory.
The IPC will display vehicle speed at 322 km/h (200 mph) .
No driver warning message will be displayed for this DTC.
CONDITIONS FOR CLEARING THE DTC


The IPC detects vehicle speed information sent from the PCM less than 322 km/h (200 mph) on the vehicle speed sensor signal circuit.
A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
Use the IPC clear DTC feature.
Use a scan tool.
DIAGNOSTIC AIDS


The following conditions may cause an intermittent malfunction to occur:
The PCM is unable to process the correct vehicle speed data sent from the VSS.
Intermittent or erratic VSS operation.
Test drive the vehicle and check for proper speedometer operation. If the PC is unable to display the proper vehicle speed information, use a scan tool to display the PCM VSS data. If the PCM is not receiving the proper information from the VSS circuit, then the PCM and VSS circuit must be diagnosed first before diagnosing a DTC B0516.
Always check for proper speedometer circuit operation by displaying PCM vehicle speed data and checking for stored VSS DTCs with a scan tool before attempting to diagnose a DTC B0516.
If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while moving related wiring and connectors. This can of ten cause the malfunction to occur.
TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.


Tests for any VSS DTCs stored in the PCM. Any VSS DTCs stored in the PCM may cause a DTC B0516 to set in the IPC.
Tests the speedometer operation. Speedometer malfunctions must be diagnosed and corrected first.
Tests for an open, short to voltage, or short to ground in the speedometer signal circuit.

 

Recommend clearing the codes, take her for a drive and see if they reappear. Please let us know if the codes come back.

BC

 

I got this B0516 about 5-6 weeks ago after my 3.42 gears were installed. I was spinning my wheels every chance I had till I got it out of my system. Cleared the code and it has not returned.

I only spin my wheels EVERY OTHER chance I get now

 

Tires get a tad bit EXPENSIVE when you have to replace them every 6 months!

 

Mine does this all the time. I still have no clue.


Good luck

 

mine runs 13.7 volts,,,never much higher...

 

reset the codes under "manual diagnostics" and see if it stays away, probably just a glitch

 

Since the vehicle has a warranty, I drove to the GM Dealer and here is the results; if you can believe it.

The "Techie" ran the diagnostics and got no error codes. Cleared the old codes and returned the car with the SE Icon no longer illuminated. Techie says if the SE Icon returns to bring it back.

Now you can imagine how much faith I have it GM's ability to maintain my car. Just lovely and the next question is, "When is a warranty useless?"

 

That is about all techncian can do. You may of just had a glitch. Nothing to diagnose in that case. Also, intermittents have to rear their ugly head to service them.