ECU CPU electrical problem on 99 SSEI help needed - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-09-2005, 12:28 PM   #11
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I'm not a big advocate of just replacing parts to attempt a fix, but I think I tend to agree with the above advice in this matter.

My Delco OEM battery died at about 4 years and was replaced. The alternator had no problems and is original.

Bet it'* the battery, and I'd start by replacing that. As to the alternator, pick up a cheap $10 Chinese voltage tester at Harbor Frieght and see where you're at there. Intermittent faults in alternators are, in my experience, rare. If they fail, it'* all at once and for good, and then the battery runs down.

Any competent battery shop can stress-test the battery in a few minutes and tell you if it'* failing.

IOf course, if the battery passes the stress test and the alternator is alternating , it'* time to look elsewhere.
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