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On a 1999 GEO Tracker, a bad fuse can cause the headlights and dash lights to blink. A bad voltage regulator or alternator can also cause lights to blink and flicker.
1990 was the first year of the Geo Tracker. 1999 was the first year of the Chevrolet Tracker. So the answer to your question is 1999.
No
never heard of a ac amplifier
you replace it
Replace it , meaning the cracked head or the gasket . Neither can be repaired . The head can be repaired if its only warped from overheating by having it surfaced . It is best on the 8 valve or the 16 valve engines to replace with new parts.
so the head wont warp
Replacing the head gasket on any vehicle is a long and complicated process, however if you wish to see basic step-by-step instructions go to the related question on the right side of the page "How do you replace a head gasket?"
i have 1995 4x4 geo tracker with a bad auto transmission will a auto transmission out 1998 4x4 geo tracker fit in 1995
does 1990 geo tracker have air bags
Remove the manifold and change the gasket. And voila!!!
To change the voltage regulator on a 94 Geo Tracker, locate it in the black plastic box on the back of the alternator. Unplug each cable from the regulator, remove it and replace.