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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. Chevy Silverado Forum (GMC Sierra)
    Code PO138/2271 ...so far I've put in new air filter, cleaned MAP sensor, as well as, 2 new sensors; I figured the first one was bad as well. My scan tool states that it is stuck rich and High voltage. Please help
    o2 sensor p0138 p2271
  2. Chevy Silverado Forum (GMC Sierra)
    I cleaned the MAF sensor, but the engine light came back on after a few miles. I was wondering what to look for next....TPS?.....injector?
    6.0 p0138
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