1996 Yukon 2Dr 4WD, Key Fob no longer works to unlock doors.

Due to the complexity's of today's vehicles, the vast majority of owners or DIYer's do not possess the proper diagnostic equipment nor the knowledge and training that's required to effectively and successfully perform their 'own' automobile diagnostic troubleshooting and repair. Unfortunately It is impossible for us here 'online' to determine what the actual failure is.. We could post a 'list' of the possibilities - however that isn't going to help due to the fact the same diagnostic equipment and troubleshooting knowledge is still going to be required before a logical repair strategy can be obtained. Therefore it is highly recommended to seek professional *hands-on* assistance with this issue as that tends to be the most cost effective and reliable solution.. Good luck! Recommended: Below is a link to local auto repair facilities (in your zip code) ▪️ https://repairpal.com/repair-shops ▪️