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The most common cause of a automatic transmission jerking, when shifting, is low transmission fluid. Fill the transmission to the full mark.
service engion soon light is on
Your transmission is breaking down inside. ether watch for it. or extensive transmission is required.
A good woman.
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Missing or mis-firing.
Maybe try putting the distributor wire back on and see if the jerking stops.
A flashing check engine light frequently means that the engine has a cylinder miss firing, the jerking you are feeling is a misfire, you probably just need to get a tune up, which means basically change spark plus and wires, and flush and change all fluids.
If the 1999 Suburban noise is a sort of loud banging noise, the problem could be that the engine have jumped time. Jumping time would cause the noise and jerking in the engine.
Have the system checked for codes, that will lead you to the cause.
That only usually only happens in a manual transmission
If your car behaves as if it's jerking, the problem could be a slippy transmission.