Update: There is this particular workshop at Kaki Bukit, "Elite Car Ventures". They provide a very in depth explanation about the possible issues with sliding doors. Although this portion of their explanation falls under the category of Vans, I believe they have the expertise to deal with your sticky situation as well. A quick google search online shows that they do a myriad of other vehicles apart from Vans, and has very good reviews online as well. Perhaps you can consider contacting them. Hope this helps.
Hi Dave, during this circuit breaker period, no workshop would be able to fix this problem. This is because it is deemed as a non-emergency issue. For more information, you can refer to this link. Hope this helps! https://www.motorist.sg/article/580/covid-19-are-workshops-still-open-in-singapore
Update: There is this particular workshop at Kaki Bukit, "Elite Car Ventures". They provide a very in depth explanation about the possible issues with sliding doors. Although this portion of their explanation falls under the category of Vans, I believe they have the expertise to deal with your sticky situation as well. A quick google search online shows that they do a myriad of other vehicles apart from Vans, and has very good reviews online as well. Perhaps you can consider contacting them. Hope this helps.
https://reliablecarservicing.com.sg/van-door-repair/