Have a 1997 olds silhouette. Replaced alternator and got a rebuilt one after batt light and subsequent abs and tcs light came on and van stopped running. new alternator seemed fine for four days. abs and tcs lights came on then batt light all on day four and then van died in traffic. tested load on batt and batt test good. pulled alternator and got tested. tested bad. put in new alternator and batt voltage does not seem to be increasing as it should. installed with 12.5 at rest and this does not rise when van is startedn (revved to 3000). tested all cables from alt and starter and all ohmed out properly. all fuses good. No current warnign lights on dash.

1. Check the negative terminal where it is grounded on the chassi (frame) or block. Clean and secure connection. Also, look for an additional ground that my be connected from the hood to the rear fire wall. These are usually found on the passenger side; if none are found, get some wire and run it from the hood to the rear fire wall, or side fire wall on either side of the engine compartment.
2. If the car can be jump started: the alternator tests good, the battery tests good - start looking for blown fuses - replace any that are bad. Also, replace the starter relay as it may be shorting out and be bad. This can be found under the hood in the fuse/relay box usually placed near the battery (just behind battery).
3. I also suggest having a technician perform a diagnostics test done before any other parts are replaced (except ground from hood to firewall). This will help diagnose a more accurate issue as why this is happening, and will save you time and money from replacing random parts. Have them test the ECM {electic control module) or "brain/computer".
Please let me know if you need further assitance.
carsandcomps