♦ GENERAL MOTORS Chip Keys
RECOGNITION & APPLICATION
GM also uses a technology called Pass Lock on some cars from 1996 to 2007. These cars do use electronics in
conjunction with the ignition lock, but there are no electronics in the key. This is often a point of confusion.
Models with transponder keys are:
CADILLAC
CHEVROLET
OLDSMOBILE
PONTIAC
SATURN
Later keys that have the PK3+ encrypted technology can also be programmed with the same simple on-board procedure
as long as one programmed key exists.
If all keys are lost to a car that use the PK3 or PK3+ technology, keys can still be programmed with an on-board
relearn process that takes 30 minutes to complete.
Exceptions: The Catera, G3, Aveo and GTO have different programming methods, so the above does not apply.
Beginning with the Saturn Astra in 2008, GM is changing the key format on more models each year to a high security
sidewinder (side milled) key. We have been cutting this style of key for 30 years.
Also, some of the models listed above use Passive Entry, Passive Start
(proximity) fobs instead of bladed keys with transponder chips. Prox fobs are either optional or standard
equipment, depending on model and year.
We are able to duplicate and originate virtually all
General Motors chip keys.
GM has first used transponder chip keys in 1997, but were slow to phase the technology in. Today, GM uses
transponders on most of their models. Do not confuse transponder
chip keys with the earlier VATS/PASS keys which contain a visible resistor pellet. Most GM
original transponder chip keys have either a PK3, PK3+ or just a "+" stamped on them.
DUPLICATION & ORIGINATION
BUICK
GMC
GM uses one of the simplest methods to add keys. The earlier PK3 keys, may be duplicated by one of two methods.
The first method is a simple on-board procedure using one already programmed key together with a new transponder key.
The second method is to clone the transponder value to a key that has a special read/write chip. Both methods are
easy and each just as viable.
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