I'm also interested to install fog lamps and I asked the seller if it's compatible with the 2008 - 2010 Malibu. Here the answer :
''Yes - Our harness is a complete aftermarket Plug and Play fog light wiring harness system for your add-on Original Equipment Manufacturer (OEM) fog lights, it has an OEM type construction, includes a fuse and relay, has the proper connectors for the H11 bulbs to plug directly into the fog lamps used in these vehicles - with this harness you just need to complete the control side - just connect to the parking light circuit (cable ties & splicing connectors are provided) or optionally you can add a switch of your choice, utilize any type of switch you wish, a toggle or rocker, or OEM style - wiring diagrams are included with the harness purchase which will give you several control options - if you chose to run to a switch inside your car you will just need to add an additional 10 foot of wire. (add $5.75 to your order if you need to add this wire)
Newer vehicles utilize a "body computer" (BCM) that must be programmed for the optional functions. Without this programming, even if you had all the correct parts installed those items would not function without the proper (by the dealer) programming. This harness does not interface with the BCM. The harness we offer replaces the need for the programming by providing discrete devices in lieu of the electronic OEM operation. We do not put any additional load on the factory wiring system by having you connecting our harness directly to the battery or fuse/relay box."