Question about 2002 GMC Envoy

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Alarm on Panel "Service Engine Soon"

This car having this Alarm for quite sometime but working fine, is it is dangerous to drive this car.

Some noise also coming from Suspensions System whenever car falls into a ditch or on a very rough ride.

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This service alarm is to indicate you that your car will need service soon. But it is only an alarm but no damage will be caused to your car.
For the suspension noises, it might pay to jack up the car and check for any axial play at the wheels and as well as the steering links play.
Cheers.

Posted on Oct 29, 2008

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I don't know who told you that , a semi- clogged catalytic will cause a low power issue an maybe a couple of DTC'S diagnostic trouble codes P0420 - P0430 ,Has nothing to do with the alarm system ! Do you mean Service vehicle soon or SERVICE ENGINE SOON ?
SERVICE VEHICLE SOON
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