3 plain-English guides.

What the sound (or silence) when you turn the key tells you — before you tow it anywhere.

Negative first, positive first — get the order right and it's a 20-minute job.

The color of the drip tells you whether it's nothing or a tow — here's the cheat sheet.
Join drivers who'd rather spend an hour in the driveway than $300 at the shop. Free, and you can quit anytime.