1999 Oldsmobile Alero Repair Question
Oldsmobile Alero Trouble code Problem
For the stalling issues, check for vacuum leaks and check the idle air control valve (IAC). Also, scan the computer for trouble codes. As far as the shifting, scan the computer to see if there are any trouble codes related to the transmission. You could just have a bad shift solenoid. Keep in mind, I am assuming that the trans fluid is clean and full.
If you decide to have the computer scanned, most parts stores will do it for free.
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