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#gmc #help #obsbuild 1500 1992 1995 1998 2003 2005 2006 350 4.8l 454 4l60e 4l80e 4wd 4x4 5.3 5.3l 5.3silverado 5.7 5.7 tbi 5.7 vortec 5.7vortec a/c alternator avalanche battery c10 c1500 catalytic converter chevrolet chevrolet silverado chevy chevy c/k chevy c/k1500 chevy c/k2500 chevy help crank no start differential duramax electrical electrical issue engine engine swap exhaust fuel fuel pump gmc gmc sierra gmt400 headlight headlights heater help interior k1500 lift lift kit lifted low oil pressure lq4 ls swap misfire need help noise obs chevy overheating p0300 quadrasteer radiator radio rough idle seats shocks sierra sierra 1500 silverado silverado 1500 silverado 2500 hd silverado1500 suburban suspension swap tahoe tbi tires trail boss transfer case transfer case shift motor transmission transmission issue truck vortec wheels wiring wiring isues yukon yukon xl z71
  1. Member Introductions
    I have the following truck, built in Oshawa where my dad worked at GM (now Retired). (Photo attached). It’s in amazing condition, one owner and near to no rust! Make: GMC Model: Sierra 1500 Year: 2003 Market Segment: Luxury Body Type: Pickup Cab Type: Extended Cab Doors: 4 Seats: 6 Drive Type...
    gmc sierra 1500 2003
  2. Chevy Silverado Forum (GMC Sierra)
    I have a 2003 5.3l sierra 1500, i have changed the TPS and the master flow sensor... But one day for no reason, reduced engine power come up when defrost is on but when i turn the defrost off the reduced power mode disapear... I don't know what to do with that thanks for your help
    gmc sierra 1500 2003 reduced engine power tps
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