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  1. The Garage
    2016 GMC Sierra Denali 6.2L, 190k miles. misfire cyl 8, and bank 2 downstream O2 sensor, rough idle low rpm, loss of power at or above 3-4000 rpm. so, I replaced both O2 sensors passenger side, ign. coil cyl 8, new plug and wires and putnew fuel injector in cyl 8, did not fix any problems as...
  2. The Garage
    2011 suburban 1500 4wd LT with 5.3LS motor. Ordered the summit racing DOD/AFM delete kit and had it installed at a race mod shop. Tuned on E85 and done around 117k miles. Currently at 130k. Zero problems since delete and tune were done. Today I got on the highway, 50-60 mph the CEL started...
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