How do I know when my front axle seals need replace? What should it cost? on 2002 Chevrolet Tahoe

I was told by an oil change shop that I really needed this, because it would fail in a week or two. I am very suspicous of there compenence.

by in Vacaville, CA on February 06, 2012
1 answer 3 comments
ANSWER by , February 06, 2012
IS THIS A 4X4 AND ARE THEY FRT OR REAR AXLE SEALS. I WOULD ALSO BE WORRIED ABOUT THEM
COMMENT by , February 06, 2012
It is 4 x 4 and they are the left and right front axle seals
COMMENT by , February 06, 2012
IS THE UNDER SIDE OF THE CAR COVERED IN GEAR OIL? IF YOU PULL BOTH AXLES AND REPLACE SEALS IT COSTS APPROX 400.00
COMMENT by , February 06, 2012
Thanks for your assistance. I will crawl under tomorrow, if it is not raining, and check. Appreciate your quick response.