Looks like another case where we can't say they do or don't being that with the remotes as John (at least one of us read his manual
) stated it'* programmable.
The last 5 GM vehicles I have gotten that were 96+ and had the remote all behaved the same. They all apparently had a factory default setting. One press of remote was flash, a second press got flash and honk.
Since the GA does not have the remote RPO, I would still go for a double check of the owners manual to see if there is a programmable or built in feature causing the behavior.