GM Service Manual Online
For 1990-2009 cars only

Keyless Entry System Description Base

The keyless entry system operates by means of remote control. Use the transmitter in order to lock and unlock the vehicle doors. Use the transmitter in order to release the endgate or the liftgate window on the utility models.

The remote control door lock transmitters are supplied in pairs with each vehicle. The remote control door lock transmitters are hand-held and attached to a key ring. The transmitter for pickup models has two buttons in order to control the operation of the system. The transmitter for utility models has three buttons in order to control the operation of the system. Whenever a button on the transmitter is pressed, the transmitter sends a coded ultra-high frequency (UHF) radio signal to the receiver.

The transmitter must be within approximately 9 meters (30 feet) of the vehicle in order for the receiver to detect the coded signal. The keyless entry system has no effect on the normal operation of the power doors locks. The keyless entry system has no effect on the endgate or the liftgate window release.

Each receiver is capable of recognizing four transmitters. Replacement transmitters may be obtained, but must be matched to the specific receiver. The transmitter is powered by a three-volt battery and is water resistant.

Keyless Entry System Description Luxury

The keyless entry system operates by means of remote control. Use the transmitter in order to lock and unlock the vehicle doors. Use the transmitter in order to release the rear hatch or unlock the cargo doors. The red button is for panic, it is intended to be used in the case of an emergency in order to attract attention in an emergency situation. This feature activates the horn several times until turned off by pressing the red button again.

The remote control door lock transmitters are supplied in pairs with each vehicle. The remote control door lock transmitters are hand-held and attached to a key ring. The transmitter has four buttons in order to control the operation of the system. Whenever a button on the transmitter is pressed, the transmitter sends a coded ultra-high frequency (UHF) radio signal to the body control module (BCM).

The transmitter must be within approximately 9 meters (30 feet) of the vehicle in order for the BCM to detect the coded signal. The keyless entry system has no effect on the normal operation of the power doors locks. The keyless entry system has no effect on the endgate or the liftgate window release.

Each BCM is capable of recognizing four transmitters. Replacement transmitters may be obtained, but must be matched to the specific BCM. The transmitter is powered by a 3-volt battery and is water resistant.

The system will turn on the interior lamps for about 40 seconds (or until the ignitions turned to the RUN position), when the doors are unlocked. The interior lamps will go off when the doors are locked.