WHich one?

[snowman44]

So I have decided to keep my 08 silverado with 83k. I'm going to change both fluids but wondering which one I should do first (transmission flush or coolant)?

[white1500]

Why does it matter which one is done first? Are they both original fluids?

 

The coolant is DIY job and the transmission not so much as far as I'm concerned.

[kstruckcountry]

Trans flush is a waste. Drop the pan, change the filter, fill it up. It can't hurt to change the hoses when you do the coolant either.

 

Sent from my SM-G920V using Tapatalk

[snowman44]

Both are original fluids. Is it a waste to get the flush or is it worth it?

[Daryl LBZ]

I definitely wouldn't flush the trans with that many miles on it.

[diyer2]

DO NOT Flush as mentioned. Drop pan, new filter refill. Consider taking and having fluid exchange ($125.00 here) done to remove all old fluid. I use Jiffy Lube. Filter and fluid exchange around here is about $250 $300. Save a few bucks doing filter your self.

[dkjbama]

At 8 years old, you're long past due for a brake fluid flush as well. Brake fluid absorbs water and you don't want your master cylinder, calipers, drum brake cylinders and brake lines rusting from the inside out. I do mine every 4 years.

 

If you don't have a pressure bleeder, let a dealer or a trusted mechanic do the job. I think the dealer only charged me $80 to do it.

[Nanotech Environmental]

Re Trans Flush-

 

At risk of possibly ruffling some feathers, here are my thoughts;

 

http://www.gm-trucks.com/forums/topic/183444-options-for-transmission-fluid-change/?p=1763270