i dislike taking car into service dep

[TLSheff]

Check the owners manual and you'll see GM recommends a tranny fluid change every 150K, not 40-50...

Since you're still under warranty, that thing should have dex VI which they claim is good for 320 000 KM...

The only mod that can void your warranty is if what you do causes the failure itself.

every 40-50k MILES is accurate for a tranny flush, but no more than 75k MILES if you can help it, just to keep the tranny in the best operating condition, this is what the service managers recommend for all 3 dealerships ive worked in... altho for someone in Canada youd need to convert that to Kilometers.
Not sure how far for a coolant flush on Dex... I know you can flush it without voiding the warranty as long as you put Dex back in it... switching to Green like most people on the forum would recommend will prolly void anything that can be considered coolant related, ex. your head gaskets blow, "Well that is prolly because of the change in coolant, had you been running Dex-cool like your suppose to, this might not have happened, so the warranty will not cover this" is what youd most likely hear from a service adviser in the shop... not that it had ANYTHING to do with it, but its not factory, thusly to blame... its dumb but thats how it goes

Most of the manuals ive gone thru, show 0 miles - 80k miles... at 100,000miles it all starts over, the recommended procedure is to check everything at 50k and if needing it, service it, if not wait til 100k and then service everything to keep it top-notch... but hey, its your car, and your money, do it as you please

[matt5112]

every 40-50k MILES is accurate for a tranny flush, but no more than 75k MILES if you can help it, just to keep the tranny in the best operating condition, this is what the service managers recommend for all 3 dealerships ive worked in... altho for someone in Canada youd need to convert that to Kilometers.
Not sure how far for a coolant flush on Dex... I know you can flush it without voiding the warranty as long as you put Dex back in it... switching to Green like most people on the forum would recommend will prolly void anything that can be considered coolant related, ex. your head gaskets blow, "Well that is prolly because of the change in coolant, had you been running Dex-cool like your suppose to, this might not have happened, so the warranty will not cover this" is what youd most likely hear from a service adviser in the shop... not that it had ANYTHING to do with it, but its not factory, thusly to blame... its dumb but thats how it goes

Most of the manuals ive gone thru, show 0 miles - 80k miles... at 100,000miles it all starts over, the recommended procedure is to check everything at 50k and if needing it, service it, if not wait til 100k and then service everything to keep it top-notch... but hey, its your car, and your money, do it as you please

Dudes in Canada... KM, not Miles.

Straight from the owners manual:

50,000 Miles (83 000 km)
Change automatic transaxle fluid and filter if the vehicle is mainly driven
under one or more of these conditions:
– In heavy city traffic where the outside temperature regularly reaches
90F (32C) or higher.
– In hilly or mountainous terrain.
– When doing frequent trailer towing.
– Uses such as found in taxi, police or delivery service.
If you do not use your vehicle under any of these conditions, change the fluid
and filter at 100,000 miles (166 000 km).

So if you grandma your car, 100 000 miles, if you beat it like it owes you money, 50K miles.