98 Tcs??
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but eveytime i try to luanch the back wheels/ rear end lift up and hit the pavement several times. as if traction control was on. i dont know why that occur

If you did have TC then as soon as you lost traction your engine would bog down and your accel. pedal would pulsate hence stopping wheel spin and giving you traction. If this is the case for you, and you have no way of shutting it off, well that pretty much sucks.
All gauge clusters will have the spot for "ASR OFF", but this just won't ever light up on a non-TCS/ASR car. GM just produces one gauge cluster instead of having one for each option.
The LOW TRAC light will come on whenever it senses wheel slippage, but the PCM will not do anything about it unless you have an ASR-equipped car with the system on.
All gauge clusters will have the spot for "ASR OFF", but this just won't ever light up on a non-TCS/ASR car. GM just produces one gauge cluster instead of having one for each option.
The LOW TRAC light will come on whenever it senses wheel slippage, but the PCM will not do anything about it unless you have an ASR-equipped car with the system on.
x2 He pretty much sum it up there



