I wouldn't ask so much as take a peak inside the rad and see what colour it is. If its brown, its mixed or rust prohibitors are long gone and its rust floating around. If its green, it might have been recently flushed. If its orange, its the factory dexcool most likely. Most people like to ignore any and all maintenance, sometimes even oil changes. Take off the oil filler cap and look inside with a flashlight and see if there's a layer of carbon buildup on the components. If so, the oil changes weren't very regular. It can be brown, or black. As to what each one means, I couldn't tell you.Originally Posted by falcongt
Some like Dexcool (nothing wrong if its maintained properly), some prefer the old school stuff, but it only lasts two years. My vote goes for Zerex G-05. Around the same price as Dexcool but a much better product. Ford and Chrysler both abandoned the Dexcool like formula, and went to this because they had issues with Dex. G-05 is also a 5 year coolant so it'll be good for remainder of the vehicles life.
If this was a dealer, it'd be worth your time having it inspected at a shop you trust for any issues, Might be able to get some cash out of the deal. But the same goes for your bike.
On the transmission, inspect the fluid first. If its very burnt smelling it might not be wise to touch it at all. If it's okay, then a pan drop would be nice.
God forbid I mention this, but the only other fluids left are the powersteering and the brake fluid. Both are considered to have a lifespan as well.
As a final note, I wouldn't touch the coolant until you were 100% positive you don't need a new LIM gasket. But chances are, if its plastic, you do.
If you look where the lower intake manifold touches the head, there will be a piece of either black plastic or silver metal (some are steel, some are aluminum). If its black, I'd suggest a new metal LIM gasket with GM coolant elbows and felpro valve cover gaskets w/ grommets. Get it all over with so you won't have to touch it again.
