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  1. #1

    Default 03 2500hd cai problem

    i have a 2003 silverado 2500 with 6.0l engine. i bought the truck a couple of months ago and have recently decided to install a cold air intake. so i bought a k&n 57 series cai kit and tried to install. long story short it didnt clear the fan. after doing a little problem solving i discovered that my truck has a throttle body spacer installed. so my question is to all you guys with throttle body spacers what do you do to install an intake? is there a brand that will be able to clear the fan or what. or is the only way to remove the mechanical fan and install an electric one?


  2. #2


    I don't know what the layout of the engine is, but if your CAI has a hard pipe with it, you could just trim the pipe on the throttle body side of it.


    '94 Chevy Suburban K1500
    3" exhaust w/ aero turbine non-baffled muffler
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  3. #3


    Yeah I would try to trim off some of the pipe. Just do a little at a time till ya get it right. Good luck.
    "You underestimate my willingness to resort to violence to resolve this conflict" :fighting0037:

    2006 Chevy Silverado 2500 HD LT
    (8" Fabtech Suspension Lift, 3" Performance Accessories Body Lift, 37x13.50 Toyo MT's, 20" KMC Rockstar, K&N FIPK, Edelbrock Headers, Edelbrock Extreme Travel Shocks with Reservoir, MagnaFlow Dual Exhaust, Black Bear Performance Tune)

  4. #4

    Thumbs down 03 2500cai problem

    Just take the t/body spacer off and throw away. There useless on all the LS type engines. They work fine on TBI type engines.

  5. #5


    Quote Originally Posted by silveradotrailblazer View Post
    Just take the t/body spacer off and throw away. There useless on all the LS type engines. They work fine on TBI type engines.
    Why are you such a hater?

    Back on topic, Measure twice per cut. Like Land Shark said, little bit at a time. It'll probably take a while, but it'll be worth it to keep the Throttle body Spacer.
    Last edited by dwill3015; 03-12-2009 at 03:59 PM.
    2002 Chevrolet Silverado 1500 z71 1985 Chevrolet Silverado k10 2006 Chevrolet Silverado 2500hd 6.6l LLY Duramax
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    AirAid Cold Air Intake with K&N Dry Filter & AirAid PowerAid Throttle Body Spacer 2" Suspension Lift 33x12.50r15 Tires EFI Live & AFE Stage 2 Intake
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  6. #6
    Legend cascott325's Avatar
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    Aug 2008
    Lawrenceburg, Kentucky


    you can replace your clutch fan with electric fans which will give you a little more powere, alot more room, and keep your engine cooler. there are fan swap "how-too's" on this forum. just do a search
    2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 10 mil wires, magnaflow high flow cats, flowmaster 80 series muffler(2 in 2 out) w/ 18 inch stainless silverline tips. i have a k&n CIA. its a 4x4 z71 offroad package. Ls model.
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    reman tranny @ 130k miles

  7. #7

    dwill3015's Avatar
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    Jan 2007
    Yacolt, Washington
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    Stay on topic guys.
    Washington State
    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
    Tuff Country 6" lift, 35" Toyo M/T's on 20" Ultra Peacemaker wheels, Quadzilla Stealth2 programmer, Diamond Eye 5" cat-back exhaust, factory Special order color Yellow.

  8. #8

    Smile 03 2500cai problem

    Its not that Im a hater Ippield, but when you work in the aftermarket industry and have acces to dynos and flow benchs you learn what works and what doesnt. T/body spacers work well on some of the older trucks (TBI style intakes) but we saw no increase in the LS family engines.

  9. #9


    Please stay on topic guys, if you would like to further your conversation, please take it to PM.

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