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  1. Chevy Silverado Forum (GMC Sierra)
    Hello, My 2007 1500 Silverado zlt with 5.3 flex 186k miles has difficulty starting and doesn't start with one key turn like it started previously. I cleaned the MAF, replaced the throttle body (per a recommendation from the shop...did it myself... wouldn't pay 860.00). The shop tested the fuel...
  2. Performance & Fuel
    I have a 2014 Silverado 5.3 with 105,000 miles. It started misfiring while pulling my camper. I have done several things so far and the misfire while towing is gone but I still have rough idle after it warms up and kind of sputters/hesitates at around 1500 rpms. It runs a lot better but that...
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