Dex-Cool/25,000k/ 5 years and few months

[douglas92000]

Discovered i went over the time limit on scheduled maintenance for coolant change though way short (25k) of the mileage recommendation. Am the original owner of the 2002 Sierra. Should i go ahead and change the coolant....or since the mileage is so low will i be good to go for awhile.....any thoughts appreciated about mileage/time affect on Dex-Cool? Have i already voided my extended factory warranty?

[gejandsons]

Change the coolant out. Time is more of an enemy than miles.

[douglas92000]

Thanks for the reply...already accomplished. Would have thought mileage was the more critical of the two.....