Where is the tension bolt for serpentine belt on a Chevy Malibu?

There isn't a single "tension bolt" in the traditional sense for the serpentine belt on most modern Chevy Malibu's (including many from the past 15-20 years). Instead, the tension is typically managed by a tensioner pulley that uses a tensioner bolt. This bolt isn't directly used to adjust the belt, but rather to hold the tensioner pulley in place under spring pressure.

To locate it:

1. Locate the serpentine belt tensioner: This is usually a pulley assembly with a spring visible. It's typically located near the engine's front, somewhere along the serpentine belt's path. It might be on the top, side or bottom of the engine, depending on the specific year and engine of your Malibu.

2. Identify the tensioner bolt: This bolt is usually fairly large and will be the primary fastener holding the tensioner assembly in place. Look closely for the bolt head that's accessible for a wrench or socket. Sometimes you may have to remove other components (like a plastic cover) to see it.

Important Note: Before attempting any work on your serpentine belt or tensioner, consult your vehicle's repair manual. This will give you specific diagrams and instructions for your model year and engine. Working on the serpentine belt system incorrectly can lead to serious injury. If you're not comfortable working on your car, take it to a qualified mechanic.