SRX 2007 liftgate falling
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  • 1 Post By The Wrench
Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, SRX 2007 liftgate falling in Cadillac SRX Forums; Hi, the electrical liftgate opens normaly , when it reaches to end it falls what is wrong...
  1. #1
    ziad67 is offline Cadillac Owners Member
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    SRX 2007 liftgate falling

    Hi, the electrical liftgate opens normaly , when it reaches to end it falls
    what is wrong

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  3. #2
    garfin's Avatar
    garfin is online now Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    Can you tell by any mechanical/motor noises if the motor is closing the liftgate or it is, as you say, "falling" as a result of there not being enough support to keep it open? If it's falling without any accompanying mechanical/electrical noises, then my suspicion would be that the struts are worn and are no longer capable of supporting the weight of the liftgate. I can't be sure if there's a parallel, but many 4th Gen Camaros and Firebirds needed to have the 2 struts that supported the rear hatch replaced after a few years. Please keep us posted on what you find.

    Best regards,

    Elie

  4. #3
    08SRX's Avatar
    08SRX is offline Cadillac Owners Enthusiast
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    Re: SRX 2007 liftgate falling

    I would guess that the lower end of the strut is loose and slips when the liftgate reaches that certain position.

  5. #4
    glake89's Avatar
    glake89 is online now Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    Here is the scoop from the SM-
    "Circuit/System Description

    The power liftgate module (PLM) controls operation of the liftgate latch motor and the liftgate actuator assembly. Under normal conditions the power latch can only be unlatched under power from the PLM through an input from the liftgate handle switch or the remote keyless entry (RKE) transmitter, but the liftgate may be manually closed to the primary latched position without the PLM performing the power latch function. The liftgate actuator assembly consists of an actuator drive motor that contains 2 internal hall effect sensors. The drive motor is mated to a gear that is connected to an actuator clutch. When the clutch is engaged the motor rotation is transferred to the clutch gear, intermediate gear, and actuator arm gear. The full open switch is a limit switch mounted on the liftgate actuator assembly along side the actuator arm gear, and will make contact with the cam on the actuator arm gear when the liftgate is near the full open position. The PLM continuously monitors the liftgate location and direction of travel using the 2 hall effect sensors located in the drive motor assembly. The sensors are used to determine when the liftgate has reached the full open and full closed points of travel where the actuator clutch should be disengaged. These positions may vary slightly and must be learned when most liftgate components are serviced."

    There are DTCs for it, would narrow down the possibilities.
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  6. #5
    ziad67 is offline Cadillac Owners Member
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    Re: SRX 2007 liftgate falling

    Quote Originally Posted by garfin View Post
    Can you tell by any mechanical/motor noises if the motor is closing the liftgate or it is, as you say, "falling" as a result of there not being enough support to keep it open? If it's falling without any accompanying mechanical/electrical noises, then my suspicion would be that the struts are worn and are no longer capable of supporting the weight of the liftgate. I can't be sure if there's a parallel, but many 4th Gen Camaros and Firebirds needed to have the 2 struts that supported the rear hatch replaced after a few years. Please keep us posted on what you find.

    Best regards,

    Elie
    ok, I have someting to say that:
    the motor is not making any noise during opening.when I hold the door after it open fully and close it electrically ; it closes normally without noise.
    I disengaged both struts, the One which beside the liftgate motor was weak and easy tho compress, the other was very hard to compress, might that be the problem? and what is the advantage of the rod connected to the motor one side and the door on the other side ?

    regards

  7. #6
    Professor Wizard's Avatar
    Professor Wizard is offline Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    I would suspect the struts...

    GM just replaced the struts on my 09' because they were failing.

  8. #7
    The Wrench is offline Cadillac Owners Enthusiast
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    Re: SRX 2007 liftgate falling

    Yeah, in my experience the struts start to weaken significantly within about two years.
    When the motor mechanism lifts the hatch, it disconnects at the top of the travel, and the door just falls.
    You can verify this by just lifting the door manually and releasing it; if it falls, struts.
    These are a real bear to replace, you must tear out most of the interior panels and the taillights to remove the lower mount. The interior panels don't respond well to removal and can be easily broken or loosened to the point they won't re-attach well. One member here did some grinding work on the taillights to simplify the strut replacement ritual, do a search to check it out.

    I don't understand your comment on the left-side, right-side struts. You should have a big strut on each side connected to the hatch and directly to the body behind the taillight. A 3rd strut (actually just a rod) is on the left side connecting the hatch to the motor mechanism.

    DG
    starnesbl likes this.

  9. #8
    conedoctor is online now Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    I got to see that motor when running my camera wire, I had to take a second to figure out what it was.

  10. #9
    deeami is offline Cadillac Owners Member
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    Re: SRX 2007 liftgate falling

    Can you help me with Cadillac SRX 2011

    My liftgate control module and pump were all ruined by the water leak.I've just purchased the new ones.

    I heard that we have to install some software together with replacing the new one
    Is that right ?

    thank you so much!

  11. #10
    glake89's Avatar
    glake89 is online now Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    Pls. ignore PM, programming is necessary for the module. I would suggest installing both parts without hooking up the connectors and then go to dealer for programming. They might charge 2 hrs.
    __________________________________________________ ________________

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  12. #11
    orandaberg is offline Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    deeami your in the wrong forum you need to go to the 2nd generation SRX for 2011

  13. #12
    deeami is offline Cadillac Owners Member
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    Re: SRX 2007 liftgate falling

    @glake89 : thank you!..However, I need to pay 10000$ membership to have my car repaired by the dealer
    Do you know any device that we can use to program it ourselves ?

    @orandaberg : I think the experiences are the most important thing .thanks

  14. #13
    glake89's Avatar
    glake89 is online now Cadillac Owners Connoisseur
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    Re: SRX 2007 liftgate falling

    dee, what do you mean you have to pay for a membership to a dealer? Where do you live, in hell? Any GM dealer can do it.

    Any one with a TechII scan tool and software can do the programming. For less than 10 grand you could buy your own.
    __________________________________________________ ________________

    This site is too much fun to not be a supporter
    Been fixin' cars for 71 years
    Some of what I know comes from experience, some from reading or listening,-most of it, I just make up

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