Hard start

Hi Guys, My 2001 Yukon Denali in last several days has hard start problem. I searched on our forums and some said, it's could be fuel pressure regulator. where is fuel pressure regulator truck, can some describe it. Is any of you had this problem. if yes what fixed it. if any one have link to a free service manual i would be appreciated. Thanks.:banghead::banghead::banghead:

Never mind on where fuel pressor regulator. I found it and replaced with new one and my truck start fine now. but still need service manual future work on it. Thanks.