4 speed on the shifter.
Both 5 speeds on the tranny.
Auto on the tranny.
If you can't find the 5 speed switch - locate the harness tail that runs under the alternator, between the tranny and the block and follow it towards the tranny. First connector is Yellow and Purple wires. It's the VSS. Then continue. The only connector left is a two wire WeatherPac, Dk. Blue (power from the fuse box) and Lt. Green (runs to the back up lights).
Some 4 speed harnesses will have the connector, even though it isn't used on a 4 speed application.
Note the data you are looking at is for the 2.5. GM changed to the 5 speed tranny at different years for the 4 cyl and the 6 cyl.
From Wikipedia
Four-speed manual[edit]
All four-speed manual transmissions were built at the Muncie, Indiana Allison plant. The 1984 production line saw two transmissions, a performance four-speed with a final drive ratio of 4.10, and an economy four-speed with a final drive ratio of 3.32. The V6 on the 1985 model and part of the 1986 production year came with a four-speed with a final drive ratio of 3.65. The lower-geared 4.10 four-speed transmission showed improved acceleration, but sacrificed fuel economy.
Five-speed manual[edit]
Isuzu and Muncie (Getrag)- five-speed transmissions were available, depending on model and equipment beginning in 1985 for the Isuzu five-speed which came on four-cylinder cars and in 1986 for the Muncie five-speed which came on V6 equipped cars.
[This message has been edited by phonedawgz (edited 07-26-2016).]
