2006 Chevy Silverado - Fuel Tank Difficult to Fill P0446 - Wheel Speed Sensor Confusion - P1

My customer just bought this 2006 Chevy Silverado on an auction. It's in mint condition with only 56,000 miles. The fuel tank won't fill correctly. We also go down a rabbit hole testing wheel speed sensors with some faulty test equipment. Part 2 here:    • 2005 Silverado Duramax- Wheel Speed Sensor...