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  1. Chevy Blazer Forum (GMC Jimmy)
    I just ran dual pipes with no cats on my 94 Silverado Blazer. When I drive fast enough it throws a code for an “inactive or not working o2 sensor”. Is there a way to bypass this, or somewhere to buy a dummy sensor? It runs just fine without it but it would be nice to not have the check engine...
  2. Chevy Tahoe Forum (GMC Yukon, Cadillac Escalade)
    I swapped an LS LM7 from 2003 Tahoe to F150 1977. (engine, fuel senders and EVAP vents into steel tank, EVAP, lines, exhaust with cats, BCM, etc) Everything works great. The truck runs superb. Enters Closed-Loop. I am having problems with Oxygen sensors. When the engine is cold, on the first...
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