2000tahoeZ71
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- Joined
- Jan 13, 2014
- Posts
- 236
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I know we have all seen a thousand of them, but I have yet to see any definitive fix. I have a 2000 Z71 obs and mine has always humminbirded, but always read correctly(as possible) until the other day. I was sitting in traffic and my needle went from 3/4 to buried at E. It then popped back up and since has read off. Filled it up and it started and E and gradually crept to full where it remained for 200 miles. I know it could be the sending unit, the actual gauge motor, or the PCM. I replaced my pump about 4 years ago with a parts store special and haven't had a lick of trouble with it. I can get a new delphi module for 109, but should I just replace the pump and sending unit first? I have seen that you can check the ohms from the purple and white wire where it plugs into the PCM, but I dont really want to unwrap that bundle of wires and start to fooling with it just yet. Thanks for any help.