Vehicle is running great. Leaving Costco with a load of cheap (for California) gas, I couldn't shift out of park. Out of the blue. While the station line waited patiently I retrieved a screwdriver from my little toolbox to get shifted into drive. So, after searching various threads, I've been working on this this morning. All fuses are good. Headlights, dash, blinkers are good. No changes in a well ziptied trailer harness. Both bulbs appear good/filaments in tact, but don't have the means to test them, and it's Sunday in the country.