When and park and hit the gas it won't go past

If it is a fuel line you would smell and see gas drip where you park most likely, unless it is up over frame and drying prior to hitting the ground which is possible. Smell gas while parked? Get up under it and look for wet spots on fuel line. Are you getting fuel through line? Pull from under hood and check pressure.

need to check your axles, and if it's not that check your brake pads/wheel bearings.

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Try cleaning the fuel injection system with seafoam and replacing the fuel filter. Look up seafoam on youtube. BTW really really really really bad idea running a vehicle on jack in gear.

remove the wiper arms from the pivots
cycle the wipers through their travel to a park
install wiper arms back on in the parked position

check that your brake pedal sensor is clicking when you hit the pedal if its not than its either bad or just stuck. if you have a automatic transmission and you hit the brake pedal you should hear a click in the shifter to disengage park if you dont you need a new switch

check battery out and battery connections real close

Hi, you have a malfunctioning brake/park interlock. When you go to shift out of park, as you know, you have to hit the brake or the shifter won't jump out of Park into Reverse. The interlock device that in this system is probably failing.

u mite have caused a lifter to losen up or u spun a rod barren if i was u id have it checked out at the chevy dealer or a mec scop

if the truck feels like,
the more gas you give it the slower it goes,
you might want to check for a converter plugging up.

remove the aircleaner intake hose and, check the intake air control flap for free movement