I have a 1994 GMC Sierra and it's burning oil, I
don't know y, but it doesn't smoke what could be
causing it, I just did a tune up and oil change not
even a month ago, it does have high mileage but
I'm just wanting to know whats causing it and what
I can do about it
How much are you burning? Mileage? Most probably worn valve seals or piston rings. You can try running thicker oil. But if you really want to fix, it would involve rebuilding or replacing the engine. do you want to keep the truck?
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