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    Novice Looking for some advice on sub/amp combo.

    Need some advice from the audio guys here. I am adding the rear factory sub box to my 03YXL. I have a Kenwood amp KAC 5204, that is 4ohm Bridged (150w x 1), and can also produce 2ohm (75w x 2). I have a 8" DVC sub ( MB Quartz DS1-204) that according to the manual is wired either 8ohm (+/- jumper...
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    Need Help - with fuel sending unit

    03 6.0 YXL 2500 - It is a long story, but I ll keep it short. After fueling my truck, the low fuel indicator light stayed on - while the gauge did not increase reading AND the info center now reads "--" and not indication of level "low" or tank level. Could it be a coincidence with the fill-up...
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    Anybody used Summit's new line of LS truck cams?

    I recently found out about Summit's LS truck cams. I have had good experience with their branded products in the past. https://www.summitracing.com/search/brand/summit-racing/product-line/summit-racing-pro-ls-vortec-truck-swap-camshafts
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    Whishh noise when shifting?

    I dont recall this noise from when I bought the truck, but there seems to be a whishhh noise when it shifts. I am trying to note exactly when it happens. It is most notable when i am cruising at lower speeds. If I am accelerating hard I dont notice - kind of happens when it is alternating...
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    Autoride shock lifespan?

    I was wondering what the lifespan of the autoride shocks is. I know how to tell on the rear "air-ride - leveling" shocks, but on the fronts? My Yuk is a 2500 so I actually have electronic shocks all the way around with no air. Traditional style shocks get bouncy, but I have heard the autoride...
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    Ring & Pinion Pattern Second Opinion

    I am looking for some input on this. I have gotten some mixed suggestions so far. I have done quite a bit of adjustments and so far this is the best pattern I can come up with. It is new gears and all new bearings.
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    Catalytic Converter - Tune Questions

    Hi I have my Yukon tuned by you guys and I am happy with it. My question is; My mileage has been suffering regardless of driving style and tune/fuel combination. SO I was checking my cats with a IR gun and one has more heat before at the inlet and lower after on the outlet. I know that is...
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    5.3 Style Y-Pipe on a 6.0?

    I am learning a lot today about exhausts. Has anybody switched from a dual-pipe 6.0 exhaust to a 5.3 Y - pipe style exhaust?
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    Catalytic Converter(s) Question

    I have a 2500 Yukon. The exhaust is quite a bit different than 1500 models and appears to be different than 2500 pick-ups. The cats are positioned at different lengths from the engine by about 20" In any case, I have been questioning my fuel mileage recently and thought to check the temperatures...
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    Fuel Pump Started making noise today...

    First time I heard a fuel pump whine today. How long do I have? I have a camping trip this weekend, not too far, but will be towing a travel trailer.
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    Rear Gear Swap Questions... - New Gears & Brand VS. Used OEM

    I am looking at swapping out my 3.73s in my 14 bolt 9.5" rear to 4.10s I am looking for replacement ring and pinion. I have found a used some on ebay that are "supposedly" in great condition. I have also found a few gear sets that are new and are about 30-40$ more. Has anybody had experience...
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    Roadmaster Active Suspension - Helper Springs? 2500 Yukon

    I have a 2500 Yukon, I was recently made aware of Roadmaster Active Suspension kits. Apparently these kits keep tension on the rear leafs so they stay in their original arched position. And as more load is added the more they arch the spring. Reports are they actually make it a more comfortable...
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    Alternative Side molding?

    I have a feeling this has been discussed, but I want to remove the large trim from my 03 Yuk XL, but was wondering if anybody has substituted it with a smaller trim from another vehicle that looks descent.
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    Idle Vibration after tune (BBT)

    I just loaded a 87/89 Tune and was wondering if anybody else experienced a In-Gear idle issue. I am experiencing a very small vibration at stop lights and it only occurred after the tune. It is noticeable in the mirrors, and interior panels (new squeaks). It was a Black Bear Tune, and I emailed...
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    05 OEM E-Fan harness in 03 Yukon questions

    I know this has been discussed quite a bit. I have read a lot of posts and pages, which is why I am here. I think the info has gotten a bit confusing to me. I have an 03 Yukon. I want to wire the OEM harness like the factory did in 05 (I think). Can someone simply tell me how to wire the...
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    Rear seat bucket in Yukon XL has slide rails?

    My Yukon passenger side rear bucket has slide rails on it. I removed the seats recently and was able to manually open the spring loaded levers that lock it in place, but there is no way that I can see to adjust the seat or the purpose for this exactly. Anybody have the same? Also does there...
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    Interior floor/trim panel clips

    I have been cleaning the carpets in my Yukon and removed most of the floor trim panels to remove the carpet. Many of the small gold colored clips that hold the trim panels have broken when I removed the panels. Does anybody know where to get replacements? I assume either the dealer or hopefully...
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    Electric Fans & Radiator Size?

    I have an 03 Yukon 2500. I want to upgrade to electric fans. I have heard there are larger radiators on some models. How do I know if I have the larger one or not? Also, Do they make electric fans for both sizes?
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    Grey Carpet Color/Dye Recommendations

    I have Grey interior in an 03 Yukon. I dont want to stain or paint the whole carpet, but there are some permanent stains that I want to touch up. Does anybody know of a dye/paint that closely matches the color? Build sheet has both 921, AND 922 CODES.
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    2500 Yukon with Autoride - How do I know if shocks are worn?

    I have switched from a Tahoe to 2500 Yukon. Old Tahoe had autoride with air and I could tell when they went bad, but how do I know if they are worn out on this truck? It has autoride and not the air lift (leaf springs). It rides fairly rough/stiff, but not bouncy.
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    Power Folding Tow Mirrors + ?

    I am looking for tow mirrors that power fold. My mirrors have all of the upgraded functions and would like to keep them. I am looking for a recommendation. Thanks
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    Switched to a 03 6.0 Yukon from 05 5.3 Tahoe, seems sluggish

    Just bought a 03 2500 Yukon XL with the 6.0 and have sold my 05 5.3 Tahoe. The 5.3 had a BB tune, but was the basic 87/89 tune. It also had the factory electric fans. Both vehicles have the 3.73 gears. Today is the first day of driving the Yukon and it seems a little bit more sluggish than I had...
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    Price for rear gear swap?

    I am a little hesitant on swapping out the gears on my 05 myself. I want to go 4.10 from 3.73. I got a quote from a reputable driveline shop. He said $500 out the door and he keeps old gear set or $600 and I keep the gear set. It would be done in a day. What do you guys think?
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    Factory Trans Cooler any good?

    I saw some similar threads, but I didn't want to hijack. My 05 has the factory tow package and trans cooler in front of the condenser. Is there an upgrade for this or is this a pretty good unit. I tow and have not seen the temps get too high (gauge added), but I know the worst enemy of the...
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    Surprise G80?

    I was changing out the diff fluid on my 05 and there was a G80 diff installed, which was not on the build sheet. I guess that is a good thing. I havent really tested it. Does this diff come in other RPOs as a packaged item, or did the previous owner add it?

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