Such a GIF would be very helpful, Mr. Graves.
Though the following link, courtesy of JFK.Hood.edu, may not include that particular GIF, it does offer a comprehensive detailing of the respective motorcade cars, positioning and occupants ---->
http://jfk.hood.edu/Collection/Weisberg%20Subject%20Index%20Files/M%20Disk/Motorcade%20Route/Item%2015.pdfQuoting from page 15 ---->
notes: Coat on right rear window deck (Wiegman film). Following
the shooting, this car and the cars forward of this point
race off immediately out of Dealey Plaza for Parkland
Hospital. The cars behind this car lag behind in Dealey
Plaza, primarily due to the fact that this and the other
camera cars stopped to let out passengers, with Camera Car #1
leading the rest and still in the Plaza at least 50 seconds
:----after fatal shot .(photo/film analysis). Kent Biffle
identifies the driver as a "Texas" highway patrolman" (DMN
11/20/83).