Question about 2002 Chevrolet Avalanche
I replaced the ignition switch because key would not turn. New ignition will not allow key to come out or vehicle to turn over. Is there a computer related code which I must enter via the radio. It appears that the anti theft device my have locked up which is causing the problem.
Is there a computer related code which I must enter via the radio ??? You don't enter anything through the radio !!!!! Having factory service repair info so you can read how the anti-theft system works an a scan tool to pull DTC'S - diagnostic trouble codes is the proper way to diagnose .
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock™ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.
The design of the Passlock™ system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the PASS-Key® system. However, the Passlock™ system eliminates the need for a key mounted resistor pellet. The components of the Passlock™ system are as follows:
• The ignition lock cylinder
• The ignition switch
• The Passlock™ sensor
• The Body control module (BCM)
• The security telltale
• The vehicle/powertrain control module (VCM/PCM)
Your best bet , take it to a qualified repair shop.
Posted on Mar 06, 2018
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
MAY BE YOU HAVE A DEFECTIVE KEY, CHECK IF THE KEY HAS A PELLET IN IT, IF SO THE KEY IS BAD AND YOUR DEALER CAN REPLACE IT.
THE PELLET IS A RESISTOR FOR THE ANTITHEFT.
Posted on May 28, 2008
I had the same problem with a 97 transport. Here is a couple solution to your locked radio problem. This is assuming you have the ACDelco radio original to the vehicle. One way is to allow the vehicle to warm for an hour. After warming the vehicle press either the 1/2 or 3/4 or 5/6 buttons together. In two on the sequences, a three digit code will come up. Write these codes down. I called the original seller of the vehicle, (if known) or a GM dealer. Speak with the parts or service department. They do not have the 4 digit code to unlock the stereo, though they can make a call to ACDelco and get the code. The other way is to take it to a dealer and have them erase the code, which is approx. 30-50 dollar depending on the service station. Hope this helps.
Posted on Oct 27, 2008
leave the key on for about 5 to10 min then try to start. Are reset to computer by leaving the key on for 10 min and try to start the vehical.Do this procese 3 time then it shold reset
Posted on Feb 12, 2009
to reset anti theft system: turn key to on engine off. leave on for 15 to 20 minutes, then turn key off, leave off for 15 to 20 seconds, then try and start vehicle. this should reset system.
Posted on Oct 25, 2009
Tips for a great answer:
Mar 19, 2015 | Ford Mustang Cars & Trucks
Jul 02, 2011 | 2003 Chevrolet Impala
Dec 16, 2010 | 1999 Mercury Cougar
Aug 24, 2010 | 2000 Pontiac Grand Prix
Mar 20, 2010 | 1999 Chevrolet Blazer
Dec 22, 2009 | 2003 Chevrolet Cavalier
Aug 17, 2009 | 2002 Pontiac Grand Am
Jun 27, 2009 | 2001 Pontiac Grand Am SE
May 26, 2009 | 2003 Ford Windstar
Apr 24, 2009 | Ford F-150 Cars & Trucks
81 people viewed this question
Usually answered in minutes!