04 Check the alternator drive-belt. Adjust its tension or replace as needed. On a street car, the crank pulley should be three times larger than the alternator pulley; fix as needed.

Your car's alternator is one of the keys to what makes the vehicle run. So what happens if the alternator goes out while you're driving? Nothing good.

On many GM vehicles, the first recommended inspection is at 150,000 miles or 10 years. Though these belts often last many years, they can become cracked or frayed and need to be replaced.