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I own a 2002 Chevy Impala 3800. I replaced my factory radio, but when I finished installing the new radio my car now has a no crank, no start issue. What do I need to do with the immobilizer?

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  • Cars & Trucks Master
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You can not just replace the radio in this vehicle with another type with out a interface module or something , I forget ! If you go to a stereo place ,where they install radios they will sell you what you need ! The factory radio is hooked to the Class 2 data bus an if other modules on the vehicle don't hear from it , it won't work !
The "Theftlock" theft deterrent system is a feature on all base and uplevel radios. There is no need to program a security code into the radio as in past model years. The theft deterrent system now utilizes class 2 serial data to determine if the radio is in the appropriate vehicle. Each time the radio receives the "run" power mode message, it compares the VIN information it has stored to the VIN information received from a module on the class 2 serial data circuit responsible for transmitting that information. If a mis-match occurs, the radio display will indicate to the user the radio is locked. Once this takes place, a DTC will set, the radio will not respond to any button presses and become inoperative. The two scenarios able to cause this condition are:
?€¢
A radio is installed from another vehicle


?€¢
A module which communicates on the class 2 serial data circuit which supplies VIN information to the radio is replaced and not properly setup with the correct VIN information for that vehicle

The only way to unlock the radio is by using a scan tool. Always refer to the table in this section to diagnose the "Theftlock" DTC for further information.

Posted on Apr 07, 2015

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Posted on Jan 02, 2017

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SOURCE: 2002 Chevy Impala Radio Doesn't Work

Check the radio fuse? Box is drivers side end of dash(drivers door open)or pass side end of dash(passenger door open)
police models have a connection for the speakers (passenger floorboard under floor mat) to connect the speakers to the police radios.
If they had the speakers connected to their radios,they may have unhooked them and not connected them back to the radio.
The wires are brown,grey,blue and light blue.All into a blue connector.

Posted on May 07, 2009

  • 819 Answers

SOURCE: 2002 Impala - 3800 - 67,000 miles once car

have seen lots of plugged catalytic converters in these cars, causing these symptoms. have a back pressure test performed on the exhaust.

Posted on Dec 04, 2009

  • 1 Answer

SOURCE: Replaced ignition switch 2003 chevy impala and car will not start

After you replace the ignition switch turn the key to start the car and release leave the key were it stops after trying to start wait 10 minutes until security light goes out turn key to full off position then repeat the above procedure two more times for a total of three on the 3rd attempt to start car wait for light to go out then turn key to full off positoion wait 10 seconds then try to start car body control module should learn new pass code and the car should start.
Big john, J@J Automotive

Posted on Mar 02, 2010

  • 4134 Answers

SOURCE: need to replace the fuel pump on 2002 chevy impala

There are two ways. One is to pull the fuel pump fuse or relay and run the engine until it stalls out. The second is to open the Schrader valve at the end of the fuel rail and bleed the pressure off. This is messier and will cause some fuel spillage, so have a rag ready to catch it.

Posted on Dec 26, 2011

  • 3 Answers

SOURCE: Need radio code for 2002 Chevy Impala

Did you happen to disconnect the battery for some reason? If so, all you should need to do is call the Chevy Dealer and talk to the parts department. Explain to them that you need the code to unlock your radio. They will probably ask you for the VIN number. This is what happened to me when I put the stock radio back into my Saturn. The dealer gave me the number and it worked. I hope this helps you!

Posted on Mar 30, 2012

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2002 chevy impala with 3800 engine using oil a quart to 100 miles start up see smoke as you drive don t see smoke let off gas plug # 5 and 6 full of oil did vacuum test remove map sensor and 18


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I have a 2002 Chevy impala 3.8 doesn't start sometimes. When it doesn't start I have fuel no injector pulse no spark but I do have cam signal. Replaced ignition control module but no change!


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How can I bypass the security code


Why do think the key security is bad? If you still have a factory key, this is not the problem...if no factory key, you can take your VIN number or original key to GM dealer to get new key that they will program for you...Check for dirty battery connections:)

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Chevy impala wont start


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Aug 24, 2014 | 2002 Chevrolet Impala

1 Answer

2002 chevy impala having intermitten starting issues


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1 Answer

How to get the low tire pressure light to turn off on a 2003 Chevy Impala? I do not have the factory radio still installed. I had a Kenwood installed when I first got the car so I'm not sure how t


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1 Answer

What's a good after market radio for a 2005 impala


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Sep 27, 2011 | 2005 Chevrolet Impala

2 Answers

Firing order for plugs and wires....on a v6 3800 2000 impala


For the 2000 Chevrolet Impala 3.8L V6:

Firing Order:
1-6-5-4-3-2

Cylinders:
.....(back).....
|...2...4...6...|
___________
|...1...3...5...|
.....(front)

Ignition Coil Connections:
(back)
o <---6
___
o <---3
o <---2
___
o <---5
o <---4
___
o <---1
(front)

Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

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SEcurity light came and car wouldnt start


I'm having the same issue and had the ignition replaced even thought I told the dealerhsip that I read this will not help. I did some reasearch and found that a bypass system is the best way to go. I called around to local places that do installation of radios, remote start ..stuff like that and they can install a bypass system for $120.00. I aksed him is this will solve the problem and he says he does it all that time and it works well. You may want to look into that...

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