I want to flush my heater core but can't find the proper hoses. I have a 97 pontiac grand am GT v6. Are the hoses under the power steering reservoir on the driver side? Or somewhere on the passengers side?

Not all power steering systems are hydraulic. I think some G6 models have electronic power steering so no fluid is needed. Referring to the owners manual it appears that only the 3.9L uses a hydraulic system. If there is a reservoir it will either be tucked behind the alternator or mounted on that end of the engine. The top mounted reservoir filler cap is on top of the engine to the left of the oil filler cap.

If you have warm air on one side and cool on the other, you've a situation with the vent flaps. But to backflush the core, take both hoses off the core and run a garden hose to the outlet side going towards the water pump. This will flush it.

clogged heater core get a coolant flush tee from any auto parts store install in heater hose and flush it for an hour... hopefully your heater core isn't leaking

drain coolant system locate heater cores hoses going through firewall you need to buy the radiator flush kit at any auto parts stores. remove heater cores hoses from one end or buy extra long heater hoses same size as heater core hoses in vechicle at auto parts store use the flush kit when you flush through one of the heater core hoses let the other hose drain in a drain pan when you use home garden hose use low water pressure dont use garden hose to the max or you will rupture heater core. your best bet let radiator shop flush whole coolant system. because heater cores hoses are in a tight spot.make sure engine off if you just going to flush out heater core only .after flushing heater core good time to replace heater core hoses.if job too hard or complicated let radiator shop flush out radiator the engine block and heater core because if radiator stopped up or engine block stopped up the gunk and rust will reenter plug up heater core.if you tight on money you can flush out your own radiator.drain out radiator using large drain pan. remove top radiator hose and remove bottom radiator hoses connect to water pump.use garden hose with flush kit part with water pressure not too high put garden hose to top radiator hose run water until clear water run out bottom radiator hose in drain pan,the flush out engine block remove thermostat.if you had another spare thermostat housing with RTV SILICONE SEALANT THAT HAS SET UP INSTALL THERMOSTAT HOUSING BACK TO ENGINE WITHOUT THERMOSTAT FLUSH OUT THE ENGINE BLOCK, WHEN DONE INSTALL NEW THERMOSTAT THEN INSTALL ORIGINAL THERMOSTAT HOUSING WITH NEW ORING WHICH YOU BUY AT DEALERSHIP.IF ALL SOUND COMPLICATED LET RADIATOR SHOP FLUSH OUT COOLANT SYSTEM.

dnt know what size is the bolt at the end of the line bythe gear box on my 2001 grand amgt replacing power steering pressure hose

first check and see if you have flow through the heater core
start the car and get to operating temp. then grab the heater hoses they should both be hot if not then you have a flow problem
you can try and back flush the heater core or replace it
if the hoses are hot then there will be a problem with the temp door under the dash
hope this helps let me know if you need more info on the heater door

remove the drain plug on the drivers side of the radiator use a bucket to catch the fluid start the car for about 1 minute then fill the reservoir so the fluid can clean th engine and radiator then close the drain plug on radiator and start the car let it run for 1 minute then tur it off remove the drain plug and close it refill the radiator an reservoir to proper level

You can unhook the hoses to the core and just hook them together with a flush fitting, or hose union.

Take off the hoses at the bulkhead/firewall that go to te heater core, use a garden hose and back flush the core by forcing water through the smaller of the 2 hose nipples, if the water runs right through then you have a heater air temp control door actuator problem