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Thread: 98-04 SLS/STS AIR pump replacement

  1. #16
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Unplugging the pump would do absolutely nothing.

    Taking the headlight out is no big deal.

    Before you start, tuck a towel or two between the headlight and bumper to avoid scratching the paint. There's a plastic panel over the headlights and radiator, held on with several plastic push rivets. The only slight trick to removing it is to move the upper radiator hose out of it's channel built into the plastic panel. Once it's off, each headlight is held in with 2 bolts. Once they're removed, the headlight pulls out. However, on the outside corner of each light, is a ball and socket retainer, that may be very tight if it's the first time the headlight is being removed, so you may need to give it a good tug, while keeping the headlight pointing straight ahead.


  2. #17
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 98-04 Seville SLS/STS smog pump replacement

    Quote Originally Posted by scott1643 View Post
    What would happen if I were to just disconnect the electrical cable? Would I get a code or a check engine light?
    Yes. There seems to be no way to bypass or disable it without setting a DTC and tripping the MIL. I looked into that.

  3. #18
    scott1643 is offline Cadillac Owners Member
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    Re: 98-04 Seville SLS/STS smog pump replacement

    Hi guys,

    Just wanted to update everyone and let you all know that the new pump is installed. I wanted to thank everyone in here for all of your advice, input, and recommendations. It really did come in handy.

    I also want to say to anyone who may be attempting to do a smog pump on their Seville in the future that removing the air duct that is mounted to the left of the pump does indeed help with getting your hands around the pump to get to the mounting bolts. Its not a huge difference, but the duct is only held in place by 2 tabs. Its well worth removing it, in my opinion. Note---the air duct doesn't have anything to do with the smog pump and don't affect the pump in any way...the duct I'm referring to is for the air intake to the engine.

    I will say that routing the new air inlet hose took more time than removing the old pump and installing the new one!! It was a matter of fishing it up behind the headlight housing area, even with the headlight removed. It gets tight back there and requires a little patience.

  4. #19
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    It's a little bit easier to route the intake hose if you remove the filter from the end of it.

  5. #20
    funnyguyMI is offline Cadillac Owners Member
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    Re: 98-04 Seville SLS/STS smog pump replacement

    Quote Originally Posted by scott1643 View Post
    I also want to say to anyone who may be attempting to do a smog pump on their Seville in the future that removing the air duct that is mounted to the left of the pump does indeed help with getting your hands around the pump to get to the mounting bolts. Its not a huge difference, but the duct is only held in place by 2 tabs. Its well worth removing it, in my opinion. Note---the air duct doesn't have anything to do with the smog pump and don't affect the pump in any way...the duct I'm referring to is for the air intake to the engine.
    Just did this last night and removing the air duct helped a ton with getting that #11 bolt out, IMO.

    I also dropped the front air dam a bit on the drivers side to get at the #15 nuts.

    Now on to the EBCM!

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