I'm considering buying a decent fluid extractor for periodic ATF drains for the Colorado. I've had people tell me to leave it in until 45k miles, which is the OEM drain interval, but others that have had these trucks claim the GM 8 speed likes fresh fluid. One guy that has a 2018, which was a common year for the shudder issue, drained his ATF at 5k miles then every 15k from there on. Never experienced the shudder, which for that year is pretty impressive. He ended up putting a drain plug on the pan, which I'm not going to do.
So, that leaves me with the fluid extractor option vs dropping the pain ever 15k. The truck is under warranty for 6 years, 100k miles. When I approach the 45k mile mark, I'll take it to the dealer for the pan drop. Until then, I'd like to do a pan flush. Most appear to extract a bit over 6 qts.
It's questionable as to whether the 2021 models come factory fill with the Mobil 1 LV HP ATF, or whether they are filled with AC Delco HP LV ATF. Either way, changing it early doesn't seem like a bad idea.
I've never used one but it seems very easy. Any suggestions?
So, that leaves me with the fluid extractor option vs dropping the pain ever 15k. The truck is under warranty for 6 years, 100k miles. When I approach the 45k mile mark, I'll take it to the dealer for the pan drop. Until then, I'd like to do a pan flush. Most appear to extract a bit over 6 qts.
It's questionable as to whether the 2021 models come factory fill with the Mobil 1 LV HP ATF, or whether they are filled with AC Delco HP LV ATF. Either way, changing it early doesn't seem like a bad idea.
I've never used one but it seems very easy. Any suggestions?