Where is the fuel filter on a 1997 gmc sierra w/ 5.7 l engine? Thanks

have you changed the fuel filter and emptied the gas tank and put fresh gas in? Stale gas will not start as well as fresh gas and there could be water from condensation in the tank.

engines need 3 things to start (petrol engine)
fuel, air and a spark,
as you have been working on your fuel system it is best to suspect this system first,
on engine turn over see if you can smell fuel at the exhaust.
if you smell fuel the fuel regulation mybe too high and the engine is flooding.
if you do not smell fuel, remove fuel line from engine and ensure fuel is getting to the engine,
(be careful not to let fuel spill this generates a fire risk)..
once fuel is getting to the engine, check your ignition system to ensure you have a good spark to ignite the fuel.
finally check your air filter is not blocked and that you have air getting to the engine.

I hope this was helpful.

the heater tap on the return end line of your injector rail.. could play a part. and all the injector fuses and relays are good too??

Heres a diagram with the firing order for your 1997 sierria with a 6 cylinder engine, hope this helps,

This year does not have a carburator,it is fuel injected.The filter is on the inner frame rail on the left side.Make sure and relieve the fuel pressure before removing the filter or it will spray fuel all over.You can do this by removing the fuel pump fuse or relay and start the vehicle and let it run tilit dies.Then turn off the key and replace the filter.You will still get some fuel coming out but it won`t be pressurized.Hope this helps.Good luck.

yes indeed it is going to! but first check the fuel filter for blockage

Chang the fuel filter.

if no fuel pressure after filter, replace filter. otherwise check for fuel presure at engine

If the check engine light is on, rent a scanner, read out any code(s), and pursue to repair(s). If no ignition along with fuel, the crankshaft/camshaft sensor may be defective. The above scan should identify the problem.

Had same problem with a Yukon. Turned out to be a bad fuel pump (Won't show codes.) When cold ran fine, heated up, no pressure. Would start after sitting for about 1/2 hour. When engine dies on you check for fuel pressure under the hood.