2000 GMC Safari van keeps blowing ING A fuse. I crased the passenger side and the A/C system was crused. Dont know if that may help too.

GMC is the make. What is the model and engine size? I went ahead and looked up info on a safari--4.3L engine for that year.
The only engine fuse I found said, engine 1 mini fuse--20 amp underhood fuse box. Is that it? Any applicable trouble codes? You would need an obd2 code reader to check codes, yourself.
About nine components get voltage from that fuse. maf sensor--02 heater circuits--camshaft position sensor--some of the evap system, plus the wiring circuit, itself.
Sounds like hunting a needle in a haystack, doesn't it? You could do some testing, unplug those components one at a time, see if you can come to any conclusions? You could use a test lite in place of the fuse so you won't blow all your fuses. If the test lite comes on, there is voltage and ground.

using a test light check the fuses with the key on as some fuses are only powered when the key is on. check both sides of the fuse.

Something is shorting out, I would trace any wires in the crunch zone and find where they are pinched or bare and rubbing metal (grounding out).

Check by the drivers side kick panel. To the left of the brake pedal

Under the hood, passenger side. If you go to YouTube and type: astro van / safari 95 blower motor replace, it'll actually show a guy doing the job.
Good luck!

THE INST CLUSTERS HAVE BEEN KNOWN TO CAUSE PROBLEMS NEED TO HAVE IT REBUILT

check the charging system check the cam angle sensor and the crank angle sensor.

Possible intake leak and or water pump.If it following the lower hose it is a good chance the pump is leaking.It if follow ing the engine block chances are the intake is leaking.

if it's a 4.3 liter v6 it's 1 6 5 4 3 2. hope that helps.

i went under for driver side then i took off passenger side wheel you also have to remove two bolts that are holding dipstick tube in place it is easy to get them from the wheel well on passenger