Here's what you should do:
1. Inflate tires to the correct pressure: Use a reliable tire gauge to inflate each tire to the pressure specified on the sticker. Don't forget the spare tire if applicable.
2. Drive the vehicle: Drive your Malibu for about 10-20 minutes at speeds above 20 mph (32 km/h). This allows the TPMS sensors to transmit data to the vehicle's computer.
3. Check the system: After driving, the TPMS warning light should turn off if the tire pressures are correct. If the light stays on *after* driving and correctly inflating the tires, you may have a faulty sensor or another problem requiring professional attention. Consider:
* Faulty sensor: One or more TPMS sensors might be malfunctioning. A mechanic will need a specialized tool to check this.
* Low battery in sensor: The batteries in the TPMS sensors are typically long-lasting but can eventually die. Replacement is necessary.
* Other issues: There could be a problem with the TPMS module itself or a wiring issue.
If the light remains on after following these steps, take your 2008 Chevrolet Malibu to a qualified mechanic or tire shop for diagnosis. They have the tools and expertise to identify the issue and resolve it properly.