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1999 Chevy Astro What could it be

Tiny
JOSE89
  • MEMBER
  • 1999 CHEVROLET ASTRO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 151,233 MILES
My problem in my chevy astro 1999 is that when runing the van in 25 -30 mph the Antilock light shows up in the dash board and the needle starts going up and down like crazy and it wont run properly its like shaking the truck
Friday, August 8th, 2008 AT 5:26 PM

3 Replies

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Do you have 4 wheel anti lock brakes or just rear wheel antilock brakes?

You talking about speedometer needle?

Does vehiclel run fine no surging during this time?
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Friday, August 8th, 2008 AT 8:17 PM
Tiny
JOSE89
  • MEMBER
  • 3 POSTS
I really dont know when I start driving the speedometer starts going up and down and the anti lock light in the dashboard turns on and I press the gas pedal and it sounds like if it doesnt run
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Saturday, August 9th, 2008 AT 1:29 PM
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
I would have the computer scanned for trouble codes, may be something happening with the 4wabs module if equipped. Or vss.
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Saturday, August 9th, 2008 AT 4:34 PM

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