My 1997 Chevy Blazer 4x4 automatic won't change gears unless I do it manually. My ABS light is on and I think it's related to the transmission issue, if the light goes out my transmission works fine. What could be causing this?
by 
Anonymous
ANSWERS: 4
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the computer if you take it to a shop the may either drill out the light or reprogram the computer of your blazer
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Have an automotive electrical shop check the computer and wiring harness. I replaced my 97 silverado computer, per a tranny shop recommendation, and found out it was the harness. Too late to take the computer back.
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Take it to a competent shop. The speed sensor could be dropping out. These are also known for ignition switches going bad. Check the trans fuse for power when the light is on, if there is no power it needs an ignition switch.
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CHANGE YOUR TRANSMISSION FLUID FIRST ALSO THE FILTER. LET IT WORK THROUGH THE CAR AFTER YOU PUT NEW IN IT. FOR A FEW DAYS LIKE 2 OR 3 . IF THAT DOESNT HELP THE SLIP OF THE TRANSMISSION THEN YOUR GOING TO NEED A NEW TRANS. BUT SHOULD NEVER CHANGE THEM MANUALLY ON AN AUTOMATIC THAT WILL EAT IT UP THE LITTLE PARTS IN A TRANS.THE ABS YOU HAVE TO REPLACE ALL THE BRAKE LINES IF THAT DOESNT WORK THEN YOU HAVE TO START ELIMINATING EACH PART UNTIL IT GOES OFF.
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