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Registered
04 XLR, 98 DeVille, 63 Coupe De Ville
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111 Posts
Discussion Starter #1
Hi there,

my STS (2005) had always a problem when starting it:
After driving, leaving and locking the car without touching ANY button or knob
it will crank and start the next time.
BUT if you turn off the engine and touch ANY radio or window buttons for example,
the car will not start again. Sometimes when locking it and leaving it for some minutes,
but not always. The display shows different messages, like "check oil level" or "check steering column lock" etc.
And nothing happens when pushing start button.
So you have to disconnect battery ground for about 10 seconds, put it back on and
it will crank and start.
Nobody at the GM stores was able to find an error, tried different software updates on all
systems without success.
So I live with this issue for some years now rather fine and if I don't forget the rules, it starts up every time.

Until last Thursday:
Got in the car, tried to start the engine, but when I pushed start all the display and interior went
out and comes back after 5 seconds. It stands in my garage, so it lights up the xenon headlamps.
Reloaded battery - no success. Bought a new battery - no success.
Still the same problem.

Can't even get it to a shop, cause it's in P and I can't pull it into N...

Any help or suggestions?

Regards,
Sammy
 

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Registered
08 STS4 V8 1SG & 04 SRX4 V8 & 01 Monte SS
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4,988 Posts
Hold down the "off/aux" button on the start button for about 10 seconds and the car will be put in 'run' mode without attempting to start the engine ... this will allow you to shift from P to N.
 

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Registered
2007 STS-V
Joined
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193 Posts
Check to make sure the main power cable entering the fuse box under the hood is tight. The bolt can come loose and cause many strange low power issues. It is tight enough to run many things but cannot pass enough current to run the starter.
 

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Registered
2007 STS-V
Joined
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193 Posts
Jumping the starter relay might confirm you have enough current to crank the engine. Always look for simple first. If it goes beyond a loose cable or bad relay, it need to go to the shop. Even if you have to pull it out of the garage.
 

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Registered
04 XLR, 98 DeVille, 63 Coupe De Ville
Joined
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111 Posts
Discussion Starter #6
So you think I should try jumping the starter relay? Nothing can happen?
 
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