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Chevrolet Impala Audio

1549 messages,  Last post on Oct 16, 2009 at 7:01 PM

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#1500 of 1549 Re: radio locked [zaeevans] by jnt Jul 09, 2007 (5:03 pm)
Replying to: zaeevans (Jul 07, 2007 8:43 pm) Impala 's BCM is virtually controlling all security aspects of the vehicle including horn sounding, power door lock, ... So it may be responsible for the locking up of the radio as well   So you may have a bad BCM unit and I do not know if the problem is software or hardware. If it is software related, then reprogramming the module seems to be a logical choice. If the hardware is bad, replacing module may be the only option. That will set you back $200-$300 for the replacement unit   The second dealer could be right on the bad radio also. If the replacement radio did not do the trick then the first dealer may be right.   There is also a third theory: pinched or intermitten vehicle bus wire that somehow keeps on disrupting the communication between the radio and the BCM module. In this case, replacing either radio or BCM module would not fix the problem permanently. This theory is only valid as long as the vehicle VIN info is required by the radio   Some newer GM radios need VIN info from vehicle to unlock. That info is from another module outside of the radio. Every time you power up the car, the radio requires VIN info and compared with what it had last time. If the VIN info is not there or incorrect, then radio would lock up. It is their version of theft deterent. Older GM radios requires you to enter a code and that code is stored locally inside the radio. In this case no communication is required with vehicle's module to get VIN number. So consult your vehicle's Owner manual about the radio's theft lock to see if the code is required or not. That will tell you what scheme is being used on your Impala.   Good Luck   jt
#1501 of 1549 lost sound by vsztul Jul 11, 2007 (7:06 pm)
I have lost my sound in my 2000 impala radio. It would flicker on and off for a few days, but now it does not work at all. The information shows up on the radio and the cd player is working but there is no sound. What do you think it is? Has anyone else had this problem? The dealer wants $80 just to tell me what is wrong and if I need a new radio. How could my radio be bad? Replies to this message: ferrante (Jul 12, 2007 4:28 am) pbaranello (Jul 12, 2007 5:18 am) jnt (Jul 12, 2007 6:05 pm) jnt (Jul 12, 2007 6:00 pm) zappaland (Aug 21, 2007 9:14 am) jnt (Jul 12, 2007 5:42 pm)
#1502 of 1549 Re: lost sound [vsztul] by ferrante Jul 12, 2007 (4:28 am)
Replying to: vsztul (Jul 11, 2007 7:06 pm) We have an 01 impala and have been trying to figure the same problem out for over 4 months now. we cahnged the radio and had it coded at dealer , still didn't work , we changed the amp in the back , still didn't work , we were told there a coaxial module in the back above speaker deck, changed that and still no sound , we are lost . our dealers told us they cannot find the problem. becuase th eradio does work just no sound , so when scaned comes up as working, go figure. we're at a stand still and singing to ourselves on long drives. hope u have better luck. Replies to this message: pbaranello (Jul 12, 2007 5:18 am) jnt (Jul 12, 2007 6:05 pm) jnt (Jul 12, 2007 6:00 pm) zappaland (Aug 21, 2007 9:14 am)
#1503 of 1549 Re: lost sound [ferrante] by pbaranello Jul 12, 2007 (5:18 am)
Replying to: ferrante (Jul 12, 2007 4:28 am) I have a 2002 with 78,000 miles, (premium radio) and a 2006.   So far other than the lousy volume power of the 2006, (with standard radio) both radios are working fine.   I just have to make one comment:   What is wrong with this picture, when GM/Chevy cannot diagnose OR fix their own cars...??????????? Replies to this message: jnt (Jul 12, 2007 6:05 pm)
#1504 of 1549 Re: lost sound [vsztul] by jnt Jul 12, 2007 (5:42 pm)
Replying to: vsztul (Jul 11, 2007 7:06 pm) Sometimes radio's computer suffers braindead incident. Try disconnect the radio fuse(s) and then reconnect them after 2-3 minutes.That will reset the radio. If your radio requires some sort of theftlock code, then you will have to remember the code and enter it to unlock the radio.   Another possibility: if the system has external Audio Amp, that module could be bad.   If there is no Audio Amp, then sometimes short on speaker coil could cause the radio's own Amplifier to shut down. And therefore no Audio   jt
#1505 of 1549 Re: lost sound [ferrante] by jnt Jul 12, 2007 (6:00 pm)
Replying to: ferrante (Jul 12, 2007 4:28 am) May be in your case, there is speaker problem: short more likely (between the pair or to Ground). In theory, the speaker coil if shorted would blow the Audio Amplifier (internal for base radio, external Amp for up level). In practice, these amplifier has protection: it shuts down to protect itself in such a event    To figure it out, you will need to disconnect one speaker at the time. If you disconnect the bad speaker from the system, the system should recover (provided its protection work).   If doing so is dificult, you could try to take the entire radio off the dash. You only needs 3 wire to power up the radio: 12V Battery, 12V Ignition and Ground (Ground is tied to metal chassis). So basicall, both 12V Battery and Ignition can be tied together and they are next to each other on the Main power connector. Next step is to find any portable speaker and connect them to at least one pair of Speaker output (Front Right+ and Front Right- for example). You should hear some white noise or even music if you tune to a strong local FM station. You should be able to find the pinout of this radio in some previous posting.   jt
#1506 of 1549 Re: lost sound [pbaranello] by jnt Jul 12, 2007 (6:05 pm)
Replying to: pbaranello (Jul 12, 2007 5:18 am) There are good dealers and bad dealers. I doubt that GM engineers could not figure out the problem. If not, their suppliers enginer could in no time. You can find incompetent dealer tech among Toyota, Ford and others too.   jt
#1507 of 1549 XM and Onstar? by p62480 Jul 16, 2007 (2:40 pm)
I recently purchased a 2005 Chevrolet Impala LS with Onstar, but no factory XM. I want to purchase the XM direct kit, and I was wondering if anyone knows if the Onstar antenna also includes the XM antenna. If so how or where are the connections for the XM part? Replies to this message: pbaranello (Jul 16, 2007 3:22 pm) p62480 (Jul 19, 2007 2:28 pm)
#1508 of 1549 Re: XM and Onstar? [p62480] by pbaranello Jul 16, 2007 (3:22 pm)
Replying to: p62480 (Jul 16, 2007 2:40 pm) Yes, the On-star and XM antenna is the same, located on the rear middle roof.   The only other antenna you have is for the remote start feature and that is located on the top of the front wind shield where you see the web like design across the entire top of the glass with a small button located in the drivers side corner.   When and if you replace the wind shield, this needs to be taken into consideration.   As far as installing after market XM, I have no clue but I know others have done this with Sirius radio.   Good Luck.
#1509 of 1549 Re: XM and Onstar? [p62480] by p62480 Jul 19, 2007 (2:28 pm)
Replying to: p62480 (Jul 16, 2007 2:40 pm) Does anyone know where the wiring for the combined antenna would be if its available? Thanks

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