99monguse

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.

2001NBMZ28

Is the trip odometer resetting to zero also? If it is check the battery for low voltage or bad connections at the terminals.

Blown Ta

iTrader: (20)

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.

smg267

iTrader: (23)

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.

99monguse

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.

Richiec77

iTrader: (3)

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.

Danny2tek

iTrader: (1)

Yep low voltage, check the terminals if there good replace the battery.

99monguse

The car starts fine... but I did notice the trip odometer does reset on intial start-up.

BURN'EM

iTrader: (11)

Battery is dying.

99monguse

Looks like I am buying an Interstate battery then...I have had good luck with them and they are cheaper then an Optima

Michael02hawk

iTrader: (26)

It's a documented problem with the 1999 model years. Search, its all in here. GM has a TBS for it.