I have a 2003 Silverado 2500 HD 4x2 6.0L ext. cab 4-dr. w/A.T. - 75,959 miles
Any opinions on changing AT fluid that's still original since new ??
I want my trans. to last as long as possible, as everyone else does I suspect.
At the same time, there are stories/myths/laws about not touching fluid after so many original miles.
I tow travel trailer (5500#) about 6x a yr. I drive about 30-35 mi. per day. No lead foot here. Northern IL is my residence. What's my best bet. Thanks for any help !!
Take it somewhere and get the trans flushed and you'll be good to go for another 75000.![]()
If your towing it isn't bad to change it once a year..personal preference I guess.
take it to valvoline instant oil change and get it done
1998 GMC Sierra SLE- Bone stock engine, 4'' in dash dvd 2 10" subs 800watt amp.
1999 Buick Park avesdf
1971 Buick Electra 225 built 455 and turbo 400
yeah, I like to think about the time the guy working there flushed the power steering fluid instead of the trans fluid...good times.
I've had em put trans fluid in my engine but I got 3 free oil changes out of it
1998 GMC Sierra SLE- Bone stock engine, 4'' in dash dvd 2 10" subs 800watt amp.
1999 Buick Park avesdf
1971 Buick Electra 225 built 455 and turbo 400
they were just training a new guy when they did mine and he grabbed the wrong gun but I do it myself now since I put a tci pan with drain plug on
1998 GMC Sierra SLE- Bone stock engine, 4'' in dash dvd 2 10" subs 800watt amp.
1999 Buick Park avesdf
1971 Buick Electra 225 built 455 and turbo 400
I would change the filter and add the 6 quarts in the trans and then take it to be flushed if you do not want to pull a line and flush into bucket yourself. Then for the $22.00 change the filter again after the flush service. I would never let a tranny go that long with out servicing it. Then again the heat out here is rough on vehichles.

I have changed mine once already and plan on doing it once a year. I tow a trailer and I plow with my truck. Have to take care of it if you want it to take care of you. Its not cheap but the other option costs a hole lot more.
2008 GMC Sierra 2500HD Ex. Cab, Fire Red, 6.6L Duramax LMM Equipped with UTG Rocker Pods
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