New PK III key made and still wont start

WHOUSE7227

MEMBER
2004 BUICK RENDEZVOUS
3.4L
V6
2WD
AUTOMATIC
140,000 MILES

My wife lost the keys so I got the key switch on and jumped the starter with a screw driver like I've done in the past but always had the key in the ignition because of starting problems. It ran for a couple seconds and died so I did it again it did the same thing like the anti-theft was killing the engine because of that chip in the key. So I had it towed to the GM dealer and they made a key and said it need more work because it wont start. Im just wondering if its the ecu or bcm. The odometer is reading error and it wont read the codes with this wi-fi code reader I borrowed either. I don't know the last time she drove the car it wasn't having any problems.

Friday, March 13th, 2015 AT 11:18 PM

2 Replies

HMAC300

MECHANIC
48,601 POSTS

Something with the anti theft system is screwed up more than likely your car doesn't have a chip in the key. The transponder or exciter in ignition switch can be screwed up or maybe a connection problem.

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Thursday, April 18th, 2019 AT 1:51 PM

WRENCHTECH

MECHANIC
20,761 POSTS

This car uses the Passkey III system that does have a transponder in the key.

You should be able to do a relearn yourself though.

30-MINUTE RELEARN PROCEDURE
Use this procedure after replacing the following components:

The passkey III (PK3) keys
The theft deterrent control module
The PCM, see important above

IMPORTANT: This procedure is not available on vehicles equipped with option code (Z49 or BAE).
If replacing a theft deterrent control module with an GM SPO Replacement Part, perform the procedure to setup a new theft deterrent control module prior to the 30-minute relearn procedure.

With a master passkey III key (Black), turn ON the ignition, with the engine OFF.
Observe the Security telltale, after approximately 10 minutes the telltale will turn off.
Turn OFF the ignition, and wait 5 seconds.
Repeat steps 1?3 two more times for a total of 3 cycles or 30 minutes.

IMPORTANT: The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

With a master passkey III key, start the vehicle. The vehicle has now learned the key transponder information and the PCM has now learned the fuel continue password.
With a scan tool, clear any DTCs.

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Thursday, April 18th, 2019 AT 1:51 PM