2012 Chevrolet Silverado 3500 HD Questions

Answered 2012 Chevrolet Silverado 3500 HD Questions

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Cant tell what gear its in park, reverse or drive, doesnt haveva trailor haul mode, doors automatically lock late and dont automatically unlock when i turn ignition off, and does not display transmission temperature! ...
service trailer brake light is on in the dash while there is no trailer connected? Tried fuses under hood and in cab, checked wiring at the back no power to the electeric brakes even when you force load it, and turned...