re: Preventative Truck Maintenance

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I can smell coolant and have a slow leak so Im sure it is on its way out.

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I have had coolant leak in one place or another for the past 10k miles, and I'm not talking about a small amount. Mine have been a gallon every 100 miles. Past two times have been hoses, and it is this time again. I just can't see it to replace the damn thing. Frustrating as hell

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I think it might be brake fluid related but dont even know where to start looking.

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Levels been decreasing?

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After all that, I need to address the service 4wd light and the traction control on/off random light

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Both are very common. Look for your EVAP canister above the spare to go out soon, and PCV will probably need to be replaced soon too. Both of those are 15 minute jobs each. In my experience, the 5.3's throttle bodies get carbon buildup pretty badly and quickly too.

I did plugs and wires on mine at like 140k, and it was a PITA, but ran much better afterwards. Replaced shocks and that helped the ride a bunch