Car began to lose power while on freeway then stopped

Here are several reasons on what could be causing your problem.
https://search.yahoo.com/search?fr=mcafee&type=E211US1494G0&p=2000+tahoe+loosing+speed+runs+rough

Fuel filter air cleaner filter plugged or need a tune up or air sensor in intake line put on computer will tell you right away if you want

An easy thing to check first is your air filter. If it is clogged, it can cause that problem. I speak from experience. Had the exact same thing happen with an '85 Oldsmobile.

Transmission band slipping.

check your fuel pressure from pump and change your fuel filter.

With the oil light coming on and the brake pedal being hard to press I would say that the engine stopped hence no vacuum -no power assist from the booster.- hard brake pedal. The lock uo feeling may come from the engine seizing up while you were still in gear

Most likely ignition. Check fuel pressure while driving,with a gauge taped to windshield.

You could have a dirty Fuel Filter, try changing that first since it's the easiest and cheapest to do. You'll find the filter i believe on the inside if the frame under the drivers area. The only other thing i can think of is a fuel Pump going bad and not producing enough fuel pressure.
Best thing, start with the fuel filter and get the truck scanned for any DTC codes.
Good luck and hope this helps.

if you don't have a gas cap on the car or if it is on too loosely then that is a possibility. Only other thing I could think of would be water in your fuel. You may try a bottle of "heat" (I think that is how you spell it) at your local auto parts store and chunk it in the gas can. if there were any problems with water that should be the cure.

Michael

can not solve problem i have the same thing happen to em too this weekend..

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