At what mileage should my tranny/coolant be changed at?

[Slammedchevy01]

For my 03 hoe'.....what mileage should the tranny/coolant be changed at? Also I know dexcool for coolant what about tranny fluid???

 

[jdpromo33]

For my 03 hoe'.....what mileage should the tranny/coolant be changed at? Also I know dexcool for coolant what about tranny fluid???

I think they recommend anytime after 75K

 

[rdtahoe]

For my 03 hoe'.....what mileage should the tranny/coolant be changed at? Also I know dexcool for coolant what about tranny fluid???

My manual on my '00 LT 5.3L calls for 5 years, or 150,000 mile intervals.

I have done it at 5 years, and it is now due again this summer.

Still looks good.

Trans should be 50K (heavy service) or 100K (car sees "regular" service).

I would use the new DexVI trans fluid for it and Delco filter, this new Dexon is backwards compatible and supposedly an much improved fluid.

If for some reason you do not have a manual for your truck, download one at the GM Owners Center website or look at the Chiltons online maintenance website for info on maintenance for your truck.