GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 4 of 4
  1. #1

    Default 2003 1500hd Reduce Engine Power New throttle body

    Experienced the reduce engine power status about a month ago then went away. Last night got it again twice on the way home. Turned off engine, waited 5 mins and it reset itself. Called dealer and they suggested a new throttle body. If im going to spend 300 on a stock from the dealer, what after market high performance is out there I can get. See the spacers available from everyone and their brother for about 90 bucks. Any suggestions on what new throttle body and where to get on line. and would i need a spacer as well.

  2. #2


    Welcome to the club. First I've never heard of a throttlebody going bad. I would remove the throttlebody and clean both sides with some CRC throttlbody cleaner and a old soft toothbrush, DON'T use carb cleaner. If it happens again than get the truck scanned for codes. Don't waste your money on a aftermarket throttlebody, the stock throttlebody will flow enough for over 500hp. Theres been people on this site that have tried the aftermarket t/bodies and they say there a headache or just don't see a differance. $300 seems like alot of money for a stock t/body. I purchased a new t/body for my '05, 5.3 from for less than 175 dollars shipped. ( I had my t/body off my truck and my black lab took it off into the woods, never to be found LOL. I still love her). The throttlebody spacers really don't do anything.

  3. #3
    Legend Bigbomber's Avatar
    Join Date
    Feb 2010


    Welcome to the site,and like silveradotrailblazer basically said throttle body spacers are useless.
    [/SIGPIC]2009 Chevy Silverado LT 1500 EXT CAB 4X4 Vortec 4.8L SFI,K&N air filter,Weathertech Floor Liners ,Weathertech Stone/Bug Deflector, Line X Spray On Bedliner, TruXport Rollup Tonneau Cover, Molded Mudguards, Viper 5701 LE 2 way Security Alarm/Remote Starter, Xm Satelite Radio,BILSTEIN 5100 rear shocks,BILSTEIN 5100 front levelling shocks,READYLIFT 2" rear lift blocks,Goodyear Wrangler Territorys -265/70R 17"

  4. #4


    Welcome to the G M T C !

    2010 Z/71 Colorado C/C
    Black 4X4 w/5.3L V8
    2007 Winnebago Adventurer
    w/8.1L Chevy & Allison 6spd.
    Canyon Lake, Texas

Similar Threads

  1. 6.6 duramax engine power reduce and maf problem
    By Rumpamuro in forum GM Diesel & DuraMax
    Replies: 1
    Last Post: 11-12-2009, 11:49 AM
  2. Reduce Engine Power
    By 22inSilverado in forum GM Powertrain
    Replies: 15
    Last Post: 04-21-2009, 03:43 PM
  3. Reduce Engine Power
    By jackie in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 3
    Last Post: 02-21-2008, 09:43 AM
  4. Reduce Power
    By grantahoe in forum Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    Replies: 2
    Last Post: 01-14-2008, 01:57 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts