Question about 2006 Chevrolet Uplander LT

1 Answer

Could this be the battery?

This is part of a problem that started a week ago this car would not start no dash indicator lights come on with the key would try checking battery connections after ten minutes car would start, found that if we Lock Unlock the car with the door switch it would start then sunday this happened. Car would not start got it started Dash displays all warning lights were flashing in a pattern turned car off restarted Dash does not work no readouts speedo or tach no turn signals but brake lights work, got it home now car will not start? Tried disconnecting battery and cleaning terminals then tried starting dash came on like everything ok but car will not turn over does not even try to start Battery check ok? Put charger on battery now I get nothing turning the key? this car has ran without issue for last 7 years and 150K miles! Any clues I dont have a lot of money to spend a a dealer can they diagnose this stuff? I have a cade reader but it will not recoggnize my uplander any more it did last weeK? could this be the BCM module! the engine ran fine no engine or drive train codes did get 2 U1300 comm shorts and a

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  • Mark Williamson
    Mark Williamson May 16, 2014

    Problem of starting is solved took it to a great local shop, He found a ground on the transmission housing that was corroded so that the electronics where not getting good voltage althout the ground in the trans housing was good this was a seperate ground! He also said the ABS issue is an electrical ground issue, I will bring it back to him next week to track it down car runs fine and brakes are working normally!

  • Mark Williamson
    Mark Williamson May 16, 2014

    He also said he has worked on a lot of this vintage chevy vans and light trucks with similar electrical issues Chevy has lots of ground problems on their electronics it seems!

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  • Chevrolet Master
  • 2,669 Answers

This is a bad earth connection . Run a new cable from the battery to the engine or transmission , then run a cable from the engine or transmission to the body . No more trouble.

Posted on Jun 16, 2014

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Posted on Jan 02, 2017

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jacobs_danie
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SOURCE: Intermittent starting issue

If any aftermarket devices were installed and used these wires for power or ground can cause these issue.these wires are the main communication center for the whole car very hard to repair without specialty tools Dealer repair.

Posted on May 07, 2014

Testimonial: "Thanks for the Info! What specialty tools do they have to check comm issues!"

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