ACDelco 21997127 User manual

Brand: ACDelco

Model: 21997127

Type: User manual

ACDelco 21997127 is a key fob programming tool that allows you to program up to four transmitters for your vehicle's keyless entry system. It's compatible with a wide range of GM vehicles, including Cadillac Escalade, Chevrolet Avalanche, Silverado, Suburban, Tahoe, GMC Sierra, Yukon, and Hummer H2 models from 2003 to 2007. With this device, you can easily add or replace transmitters without the need for a professional scan tool. Simply follow the step-by-step instructions provided in the included manual to program your transmitters and enjoy the convenience of keyless entry.

INSTRUCTION SHEET

KEY FOB PROGRAMMING INSTRUCTIONS -

21997127

FOR AUTOMOBILES:

These vehicles can be programmed using the

instructions below:

• 2003-2006 Cadillac Escalade

• 2003-2006 Cadillac Escalade ESV

• 2003-2006 Cadillac Escalade EXT

• 2003-2006 Chevrolet Avalanche 1500

• 2003-2006 Chevrolet Avalanche 2500

• 2003-2007 Chevrolet Silverado 1500

• 2003-2003 Chevrolet Silverado 1500 HD

• 2005-2007 Chevrolet Silverado 1500 HD

• 2003-2004 Chevrolet Silverado 2500

• 2003-2007 Chevrolet Silverado 2500 HD

• 2003-2007 Chevrolet Silverado 3500

• 2003-2006 Chevrolet Suburban 1500

• 2003-2006 Chevrolet Suburban 2500

• 2003-2006 Chevrolet Tahoe

• 2003-2007 GMC Sierra 1500

• 2003-2003 GMC Sierra 1500 HD

• 2005-2007 GMC Sierra 1500 HD

• 2003-2004 GMC Sierra 2500

• 2003-2007 GMC Sierra 2500 HD

• 2003-2007 GMC Sierra 3500

• 2003-2006 GMC Yukon

• 2003-2006 GMC Yukon XL 1500

• 2003-2006 GMC Yukon XL 2500

• 2003-2007 Hummer H2

These vehicles require the use of a professional scan

tool for programming (see your local GM dealer or

ACDelco Professional Service Center):

• 2005-2006 Chevrolet Equinox

• 2006 Pontiac Torrent

• 2002-2003 Saturn Vue

CAUTION: TEXT

IMPORTANT: ALL TRANSMITTERS WHICH ARE TO BE RECOGNIZED BY THE PDM

MUST BE PROGRAMMED IN A SINGLE PROGRAMMING SEQUENCE. WHEN USING THIS

PROGRAM METHOD, ALL PREVIOUSLY PROGRAMMED TRANSMITTERS WILL BE ERASED

UPON THE RECEIPT OF THE PROGRAMMING SIGNAL FROM THE FIRST TRANSMITTER.

PROGRAMMING INSTRUCTIONS

The order in which the transmitters are programmed will determine

its numbering position within the PDM memory. The ﬁrst transmitter

programmed will be transmitter #1, and the second transmitter pro-

grammed will be transmitter #2. The number stamped on the transmit-

ter case is for reference only; #2 can be programmed as #1, or vice

versa. Additional unnumbered transmitters are also available.

1. Close all the vehicle doors.

2. Insert the ignition key into the ignition lock cylinder.

3. Press and hold the door unlock switch.

4. While holding the door lock switch in the unlock position, cycle the

ignition ON, OFF, ON, OFF.

INSTRUCTION SHEET

5. Release the door unlock switch. The doors will lock and unlock to

conﬁrm the program mode.

6. Press and hold the LOCK button and the UNLOCK button simulta-

neously on one transmitter. After a delay of approximately 15 sec-

onds, the doors will lock and unlock to conﬁrm the programming of

that transmitter.

7. Repeat the previous step to program up to 4 transmitters.

8. Turn the ignition switch to the RUN position in order to exit the key-

less entry transmitter programming mode.

9. Operate the transmitter functions in order to verify correct system

operation.

ACDelco 21997127 User manual

ACDelco 21997127 User manual

ACDelco 21997127 User manual

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