It's best to verify compatibility using the part numbers. Look up the part number for the blower motor relay in your 2000 Malibu's repair manual or online parts catalog (like AutoZone, Advance Auto Parts, etc.). Then compare that part number to the part number of the relay from the 1999 Malibu. If the numbers match, you're good to go. If they're different, even slightly, it's risky to assume compatibility.
Using an incorrect relay could lead to:
* Failure to function: The blower motor simply won't work.
* Damage to the relay: The relay might overheat and fail.
* Damage to other components: In rare cases, an incompatible relay could damage the blower motor or other parts of the electrical system.
To be safe, always use the correct part number for your vehicle's year and model. The small cost difference between a correct and potentially incorrect relay isn't worth the risk of further problems.
