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speedo and start-up?

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Old Jul 6, 2008 | 11:49 AM
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Default speedo and start-up?
When I start up my SS the speedometer goes all the way to like 100mph then slowly back down on the initial start-up...along with the tach! The tack should move obviously but why the speedo; I never noticed this before.
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Old Jul 6, 2008 | 12:17 PM
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Is the trip odometer resetting to zero also? If it is check the battery for low voltage or bad connections at the terminals.
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Old Jul 6, 2008 | 05:55 PM
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i heard most 99' have that problem, mine does it everytime i start the car, and the trip odometer resets to 0.
i learned to live with it.
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Old Jul 6, 2008 | 07:40 PM
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did you do anything with the cluster recently??

I know whenever I take mine out and put it back in it will do that. It is a one time occurance though. It is def related to your cluster loosing power and regaining it again. Take it out and check connections or your fuses.
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Old Jul 6, 2008 | 10:52 PM
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No, I haven't done anything to the car, other then replace the door speakers with OEM units. I don't recall the car doint this before, but I will check the odometer tommorrow to see if it resets.
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Old Jul 7, 2008 | 11:20 AM
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Your battery is about to die on you. I had an EXTREMELY similiar issue with my car.

Is it a little hard to crank? Do you have a multimeter? Measure the standing voltage without the car running. If it's in the 11V or less, then the battery is on it's last legs. A cell is on it's way out.
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Old Jul 10, 2008 | 05:54 PM
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Yep low voltage, check the terminals if there good replace the battery.
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Old Jul 11, 2008 | 07:21 AM
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The car starts fine... but I did notice the trip odometer does reset on intial start-up.
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Old Jul 11, 2008 | 07:31 AM
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Battery is dying.
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Old Jul 12, 2008 | 10:07 AM
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Looks like I am buying an Interstate battery then...I have had good luck with them and they are cheaper then an Optima
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Old Jul 13, 2008 | 08:08 AM
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It's a documented problem with the 1999 model years. Search, its all in here. GM has a TBS for it.
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