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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. General Chevy & GM Tech Questions
    I've got a 2008 Avalanche LTZ w/5.3. I put headers on last week. It had 4 O2 sensors on it, the headers only had 2 O2 sensor ports, so I put the rear ones in and hooked them up. Now my check engine light is on. I can shut it off with my scanner. It comes back on within about 10 miles. Any ideas...
    o2 sensirs
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