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Thread: Alternator for obs that will mount in lsx truck bracket

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  1. #1
    Quote Originally Posted by ImportThis View Post
    if you're buying them from vatozone, no wonder they aren't lasting.
    Agreed lol my brand new $89 eBay altenator has proven to be the most reliable so far (compared to vatozone)

    The Fleet...
    2003 Suburban- 5.4 L59 331CI 10:5.1 Compression -Built by ME
    2004 Avalanche- 5.7 LS1 -NOT built by me
    2005 Silverado RCSB- 5.7 LS6 -Built by ME

  2. #2
    Found the answer. Pin B on the lsx 4 pin alternator connector should be connected to red pcm connector pin 15. I had this wire connected to battery voltage. Out of pcm R15, this voltage is about 9 volts. Not for sure, but this is probably why i was burning up alternators, too much voltage on this wire. some pcms have two wires, another going to R75 and pin "C".
    Steve
    66 Chevelle, 454, 200r4, 12.9's, 86 K5 with 5.3

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