94 chevy blazer


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Old 09-05-08, 05:09 PM
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94 chevy blazer

I had the trans filter and fliud changed and when I got it back it wont shift out. I can shift it out manually but it wont shift on its own. if I put it in drive it stay's in third gear I mean it starts out in third. what is the reason? and how can I correct this?
 
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Old 09-05-08, 05:16 PM
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You might try removing your battery cable and reinstalling it. I've had similar problems once before on my wrecker (has a GM 4L80E tranny), but I don't recall what had to be done to fix it. The battery trick has sometimes fixed little quirky things that mine does once in a while.

You can also try reading codes:

http://www.troublecodes.net/GM/

Tranny codes will be up in the 70's & 80's and can occur without lighting up the check engine light.
 
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Old 09-07-08, 04:41 AM
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Question dlc running the codes

where would the DLC be located to run the codes?
 
 

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