when driving 40 m.p.h. the tach is @ 3,500, is this normal? on 1993 Cadillac Seville STS

Tach red-lines @ 6,500+, what is the deal with these Northstar engines? Are they reliable?

by in Coos Bay, OR on April 21, 2013
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1 answer
ANSWER by , April 21, 2013
Have transmission checked! It is either slipping or in a lower gear with that many rpm @ 40 mph.