Question about 1999 GMC Jimmy

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99 gmc jimmy sle keyless remote and security issue

I have a 99 gmc jimmy SLE the keyless entry will not work I can't get the car into program mode. I have the correct procedure. Also the security system does not operate. Previous owner installed a remote car started and had to take it out because it wouldn;t work. What can I do to repair the keyless entry and security issue. I want to put the electrical back to factory. Deals want too mch to just look at this problem.

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  • spirit2323 Apr 23, 2009

    I have the proper test equipment. I will try to find a schematic of wireing to see if I can figure this out. I am not sure where to start though?

  • Anonymous Apr 23, 2009

    Ah! Ok I will do this I am having problems finding the diagram though any suggestions

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Hi: From my experience the security issue is easily solved because hitting the factory key FOB lock button is the only way to activate it, hitting door lock button will not activate it. When installing a remote starter no wires are cut usually, just spliced into which means... make sure that where wires were spliced they are taped. If you have the original factory key FOB use a quarter and pop apart, replace the battery, key FOB should have retained its factory setting if your lucky, if doesn't work go to internet search and find programming procedure. Hope this helps... please rate suggestion...ty

Posted on May 21, 2009

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Sounds like you have some wire tracing to do; I wouldn't try this without having complete electrical diagrams at hand. I recommend you procure (buy or check with your local library) an aftermarket service manual which will contain what you need to know. If Haynes has one for your truck, they have been better than Chilton (belong to the same co.) but either would be better than none.
If you don't already have a multimeter for checking continuity (resistance) and voltage, you can buy these at Radio Shack or auto parts stores for <$20 US or if a Harbor Freight Tool store is in your area, <$10. They come with Chinglish instructions that are sometimes even intelligible. 

Posted on Apr 23, 2009

  • Steve Allison
    Steve Allison Apr 23, 2009

    Just using a little logic and an initially confusing (this too shall pass) electrical diagram, you'll find the logical starting point.
    I would start at looking how the security system interacts with ignition and door-locks.   

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If you haven't already got it fixed. I have the same issue same idiot type installing a remote car starter. He took out the remote reciever module that is located lower left hand Instrument panel in the same place the plug in interface for code analysis. I have bought a new reciever and all is well again.

Posted on Apr 10, 2010

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Posted on Jan 02, 2017

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Wiring diagram 99 sle gmc jimmy


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You need to return the remote to midwest keyless and either tell them to give you a remote with the exact part number or buy one off of ebay. They are about $60 from the dealer. When the doors lock and unlock, the computer is telling you that the brain is now in learning mode but it is a must to have the correct remote. I have programmed thousands of keyless remotes so please believe what I say. You can program up to 4 remotes for one car but they all must be programmed at the same time. If you buy one remote and program it then get a second remote at a later date, you need to program both simultaneously. If you just program the second remote, the computer will no longer recognize the first remote. That is just some extra information for you. Let me know if you need any more help.

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2000 gmc jimmy security light flashes. How do you turn it off?


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Transmitter Programming Notes Transmitter Programming

  1. Start with the ignition OFF, hold down the power unlock button on the door panel. Turn ignition key ON, OFF, ON, OFF. Release power unlock button on the door panel. The locks will cycle once.
  2. Hold down the keyless entry transmitter LOCK and UNLOCK buttons for 15 seconds . The locks will again cycle once.
  3. Repeat step #2 for each additional keyless entry transmitter.
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That you need to take it to a car stereo dealer that install NEW keyless entry's...Sorry, thats the easiest way to fix this issue.

Jun 14, 2009 | 1999 GMC Jimmy

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I'm looking for instructions on how to program the keyless remote


HOLD TO UNLOCK BUTTON ON YOUR DRIVERS DOOR, WHILE HOLDING BUTTON DOWN TURN KEY ON, OFF, ON OFF, ON OFF, YOUR DOOR LOCKS SHOULD CYCLE,. LET GO OF THE UNLOCK BUTTON. HOLD DOWN LOCK AND UNLOCK BUTTONS ON YOUR REMOTE AT THE SAME. IT WILL TAKE ABOUT 1 MIN AND YOUR DOOR LOCKS WILL CYCLE AGAIN. IF YOU HAVE MORE THAN ONE REMOTE, HOLD DOWN LOCK AND UNLOCK ON THAT REMOTE AFTER FIRST REMOTE IS PROGRAMMED. ONE AT A TIME. TURN VEHICLE ON AND TURN BACK OFF. YOUR REMOTES SHOULD WORK. GOOD PLACE TO HOLD YOUR REMOTES IS CLOSE TO IGN. CYLINDER SWITCH

May 04, 2009 | 1995 GMC Jimmy

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U-joints-99 gmc jimmy sle 4by4


Considering that I've done that job five miles back in the woods with basic hand tools. It should not be too difficult. (yes, I carry a spare)
You may find it easier if you get a cheap ( manual like haynes$20) The book helps with lots of other stuff and can save you $ later too!
If you run into any problems just post back and I'll help you through it!

Apr 25, 2009 | 1999 GMC Jimmy

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