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    New starter and battery no start problem.

    We recently had the transmission replaced in our 2003 GMC Yukon Denali Xl. Ever since we got it back it has had some strange starting issues. Initially thought it was the starter, replaced with a new unit and replaced the battery due to multiple complete discharges. When you turn they key the...
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    Driver's door/master window switch wiring diagram.

    Does anybody have a wiring diagram for teh driver's side door or master window switch? THis would be for a 2003 Yukon Denali XL. I have lost all function in the door and I am trying to track down the problem.
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    Fuel pump replacement access door

    So I am in the process of replacing the fuel pump in my xl Denali. I refuse to drop the tank especially given the fact I filled it up the day the pump died and GM's decision to not put an access panel to change the fuel pump is asinine at best. So my question is this. For those that have cut...
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    Hesitation/no acceleration and stalling issue HELP

    This all pertains to a 2003 Yukon Denali XL So yesterday I go and fill up my Yukon to head to a baseball game. After filling up I start driving towards the stadium and suddenly the truck stops responding to throttle inputs from me. I give it gas and it goes nowhere. It does that a couple...
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    Aftermarket XM antenna mount option

    I recently added an aftermarket receiver to my 03 Denali and with it I did an aftermarket XM unit too. Well I had been driving around with the XM antenna mount up under that dash like was suggested by some people. I was never really impressed with the XM coverage I got with it mounted there as...
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    Pioneer double din install.

    After a year or so of trying to decide what to install in my truck I finally opted to go with the Pioneer AVH-X3500BHS. Now I went about this a different way than most installs as I left the head unit in place to use as a navigation system (2003 Denali xl non touchscreen navigation). While it...
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    Reduced Engine Power but only at start up.

    The lovely problem has been going on for the last couple days. I get the "stability system disabled" and reduced engine power message which makes the truck ever so fun to drive. The thing is it only happens at start up and only when the truck is warm. If I start the truck cold it is fine but...
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    Tan interior from a Denali and an Escalade the same?

    Just as the title states is the tan used in a Yukon Denali the same color tan used in an Escalade? Also has anybody swapped out their interior for that out of Escalade? I have a Denali and I am thinking about swapping my blackwood stuff out for the Escalade's wood trim. Has anybody done that...
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    Interesting discovery today wiring a LOC

    I installed a LOC (line out converter) on my factory Denali/Bose system today until I do a full system install. I tapped into the radio's outputs on the back of the radio itself to get a full audio signal (even though I was only hooking up a sub). After hooking up up the sub I noticed that the...
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    Replacing factory CD player.

    I am thinking of replacing the factory CD player with a double Din after market unit. My question is can I remove some of the plastic that sits just above the factory unit behind the trim panel? This is on an 03 Denali that has the remote CD player mounted below the radio. Attached is a...
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    XM problem "No XM Signal"

    I was driving around the other day and my Xm went out. I didn't think much of it until it stayed out for longer than the usual interference. I have checked every connection behind the glove box and now at day 3 I still have no XM. I have had them send a refresh signal twice and it has not...
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    Subwoofer location preference.

    I am planning on adding a sub or a pair of subs to my 03 Denali XL. My question is would it sound better to have one sub mounted in the cargo area roughly where the 00-02 sub was located in a custom box or two subs mounted under the 2nd row seat? Assume that the sub(s) would be the same. If...
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    CD changer signal

    Is it possible to tap into the factory wiring to feed an audio signal back to the factory head unit from the CD changer? What I would like to do is hook up some source in place of the factory changer and use the existing wiring to send the signal back to the factory deck. Can this be done and...
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    Best way to retain factory RSE and upgrade your system.

    I have an 03 Denali with the non touchscreen nav and I and planning on upgrading my system. My problem is I have two little ones and I do not want to lose the functionality of my rear seat entertainment. My question is what is the simplest way to accomplish this? I have been looking at the...
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    Transmission choices

    I have an 03 Denali XL and I know sometime in the near future the transmission will die on me (she has about 240k on her) and my question is this. When replacing the transmission is there any reason to not just replace the 4L65 with another 4L65 or would there be a benefit to going with a...
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    low idle, stalling and a dead battery

    So today I get up and drive to tie-dye some shirts with the family (on vacation) abd when I come out to leave to drive back to town to go to school the truck is dead. Jumped it off with my Nana's subaru and it fires right up. Find the local Advance and drive it over to get a new battery. On...
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    03 Denali aftermarket head unit question

    I have an 03 Denali XL (Bose, factory non touchscreen nav, rear flip down DVd) and I would really like to ditch the non touch screen nav for a nicer pioneer or the like unit. My question is how hard is it to wire in everything to work with an aftermarket head unit? I know there are interfaces...
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    lowering questions

    I have a 2003 Denali XL (auto level) and I am thinking of doing a 2/3 drop and slap some TBSS 20"/22" wheels. I have a few questions. When dropping 2/3 does the truck suffer any poor ride quality issues? Does it tend to wear tires out like lowered cars do? Do the 22s ride good with teh...
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    Factory ride height

    I picked up an 03 Denali XL to replace a hail damaged 04 Yukon XL and I swear my Denali sits lower than my 04. I also was parked next to an 03-06 Denali today and mine did sit lower. Does anybody know what the factory suspension height is at the fenders or bumpers?
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    Factory height on 20s or 22s?

    I am looking for pics of anybody that is running 20s or 22s but at factory ride height. I have an 03 Denali XL and I am thing of going with bigger wheels but I am still on the fence on doing a drop. If I did drop it I would probably only do a 2/3
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    Factory extarnal 6 disc Cd changer question

    I have been thinking about adding a carputer to my factory nav radio and I am curious if it would be possible to tap into the feed that the factory head unit uses for the factory 6 disc changer. My idea is to maintain the stock headunit for the radio and XM functions and then have the carputer...
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    NNBS radio into a NBS?

    I know there would be some work involved but is it in anyway possible to make one of the newer radios work in an 03-06 Denali? I would like to keep as factory of an appearance as possible while having the ability to listen to MP3 discs and have a USB port. Could it be done an maintain fully...
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    Changing factory navigation radios.

    Is it possible to change out a non touchscreen nav unit with one that is touchscreen? This is for an 03 Denali xl
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    Adding a USB control to a factory radio (04 Yukon)

    I would like to retain the factory headunit in my 04 Yukon XL and I am curious if anybody has gotten anything like the Kenwood KOS-V500 or the like to work? My Yukon has Bose and Onstar. Would it be possible to tap into the XM input into the receiver to add something like this? I know I...

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