HI, Four inch (4") is the standard speaker that is fit there now but a five and a half (5 1/2") will fit also, a little cutting of the fiberboard is necessary and when it comes to putting the panel back on, you'll need to open the hole and use a new speaker cover because the holes that are there are for the four inch (4") that's in there. There are a few very good four inch (4") speakers out there, check at Crutchfield and then if money is no object, then CDT Audio. You could use component type speakers and mount the tweeter high, it's just more work. Hope this helps. Good luck. Steve H.
my 1990 has 4" speakers hole in the back but i have 5" speakers in there now.
THE FUEL FILTER FOR A 91 GEO TRACKER IS LOCATED UNDER THE CAR NEXT TO THE FRAME BY THE REAR AXLE NEAR THE FUEL TANK.
11 gallons
The 1990 Geo Tracker IAT sensor is located on the top of the transmission. The IAT sensor will be near the back of the transmission.
in the glove box
between the grill and the rad
The door speakers in Geo Prizms From 1993-1997 and possibly newer are 4in. and the rear speakers are 6.5in.
from 1989 to 1996 the size is 108
6.5 inches
The speed sensor for a 1996 Geo Tracker is located on the transmission housing. The speed sensor is important , it keeps track of the tires and delivers the figures to the main system
The rear speakers are the same size of the front. 6.75" but 6.5" will work also
To my knowledge, neither Chevrolet nor Geo produced a Tracker in 2007.