Car Information:
Chevy Trailblazer
Year: 2002
Engine Size: 4.2L6
Trans: Automatic

Issue / Question:
My problem seems to have two parts. The truck seems to run through a good quality battery about once a year. Whenever I disconnect, replace, and reconnect the battery, it seems as though my truck forgets how to drive with the a/c on. If I am at an idle with the a/c on the truck will stall out. It’s almost like the drive belt is slipping because the timing is off between the alternator and the compressor. the dealer once told me that it will take about 50 miles of driving for the computer to re-teach itself how to perform. Well, every time I disconnect the battery that 50 miles seems to get longer and longer. Last time this happened I drove 300 miles before I could run the a/c with no problems. Any ideas?

The computer is having to relearn. The only way to speed up the process is re-program it! NOW: If you want to avoid this all together, have another 12 volt battery on hand, connect a set of jumper cables to the extra battery and the vehicles battery cables while you replace the battery. This will allow the computer to retain its memory so it does not have to go through a relearn procedure! Don’t you just love computerized electronics?

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Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
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