Transmission fluid change on 2002 GMC Envoy

January, 2014, dealer replaced transmission seal @ cost of $114, 60,000m August 18, 2014, today, transmission fluid changed @ cost $200, 65,000m. How was seal replaced in January w.o. replacing fluid? Was old, used fluid used?

by in Palm Desert, CA on August 19, 2014
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1 answer
ANSWER by , August 19, 2014
Depending on what seal(you don't specify) , no fluid may have drained out ...was it an axle seal?