This is a cross-post from the Olds forum since I have an Olds 98, but this issue would apply to Chevy and other owners as well.
I need to buy a new keyless entry remote for my car, but it's been hard to find the exact right part number on ebay. (My part number is 12522338, for a 1990 Olds 98.) How can I find out whether I can use a Chevy, Pontiac, or other similar 3-button remotes will work on my car. Another thing I wonder about is why some remotes have the trunk button on the bottom and others have it on the top-right.