H3 V8-5.3L (2008)
Keyless Entry: Technical Service Bulletins
Keyless Entry - Remote Entry Operational Characteristics
Bulletin No.: 99-08-52-005C
Date: January 30, 2008
INFORMATION
Subject:
Remote Keyless Entry Operational Characteristics
Models:
1997-2008 All Passenger Cars and Trucks
2003-2008 HUMMER H2
2006-2008 HUMMER H3
2005-2008 Saab 9-7X
with Remote Keyless Entry
Supercede:
This bulletin is being revised to add model years and additional information. Please discard Corporate Bulletin Number 99-08-52-005B (Section 08 -
Body and Accessories).
The following information regarding Remote Keyless Entry (RKE) operation may be given to customers as needed.
The General Motors RKE systems operate on high frequency radio signals. Therefore they may be subject to radio signal interference which will affect
RKE operation. Some of the typical conditions which result in reduced RKE transmitter operation are listed below.
To prevent battery drain, RKE transmitter will lock up if any button or buttons are depressed longer than 30 seconds. The transmitter will unlock if
another button is depressed. While programming the transmitter in the relearn mode, use the J 43241 tester, to confirm that the signals are being
transmitted to the RCDLR. If the RKE locks up during the programming, depress another button to unlock the RKE.
Note
Always refer to SI for latest diagnostic information
If on the second press of the unlock button all doors are not unlocked it may be due to the time delay needed by the system to recognize the second press
of the unlock button. In order to unlock all doors press the unlock button once pause 1-2 seconds and press the unlock button the second time.
There needs to be a pause between button presses so that the receiver can properly process the signal from the transmitter.
For many 2006 and later car lines the trunk release button requires a press and hold before the trunk lid will release.
Line of sight. The transmitter signal may be obstructed by obstacles; another vehicle building or other obstructions in the line of sight.
Proximity to radio towers airports police and fire towers.
The presence of fluorescent lighting.
Installation of some aftermarket accessories have been known to affect the RKE performance as well.
Some brands of radar detectors CB radios walkie talkies mobile radios cell phone chargers and cell phones (especially 3-watt bag phones which are
placed on the floor of the vehicle) have jammed the radio frequencies of the RKE system.
Remember these devices do not have to be in the customers vehicle. They may be in another vehicle which is in close proximity. However if the
customer has one of these devices in their vehicle and if the RKE system works with these aftermarket devices unplugged refer the customer to the
aftermarket supplier. The aftermarket device may not meet the requirements of the FCC Code.
If the customer comments that the remote transmitter fails to operate press each button on the transmitter one at a time while observing the vehicle
systems.
If only the fuel door (Cadillac) or panic button (all other vehicles) works or the transmitter fails to operated re-synchronize the system following the
transmitter synchronization procedure found in the Keyless Entry sub-section of Body & Accessories in the Service Manual. If the RKE system is
auto-synchronized reprogram the transmitter following the procedures in the Keyless Entry sub-section of SI.
