what is P1819 on a 2005 Buick rendezvous 3.4 liters

2005 BUICK RENDEZVOUS
118,000 MILES
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BENNYCFC
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transmission jumps when higher gear
May 10, 2012 at 4:54 AM
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SATURNTECH9
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So its shifting hard into all the higher gears?
May 10, 2012 at 6:48 AM