bad gas or something else? 6.0 denali

[ATL]

i agree with starting with simpler things, go get that loaner fuel pressure gauge

 

[toneman]

I would try the simpler things first, or cheaper that is. lol. Maybe try replacing fuel filter first also.

I can't speak for the OP's model or other certain model-year trucks/SUVs, but I do know that replacing the fuel filter on my '04 YDXL would be a futile exercise, if only because the filter is part of the fuel pump assembly, with the fuel pump itself located inside the fuel tank. IOW--if I'm gonna drop the fuel tank just to get to the filter and the pump has 100K miles on it, I might as well just replace the pump instead because it will definitely go out eventually if it hasn't started acting like it's about to do so.

 

[Biggmann]

If it is the fuel filter here is a clip from youtube DIY.( http://www.youtube.com/watch?v=PJqkZVTRakE&feature=related) . Hope this helps.

 

[ATL]

II do know that replacing the fuel filter on my '04 YDXL would be a futile exercise

no, i didnt mean changing out the pump and stuff was simple. i meant it is simple to check the pressure and see how its doing. also, i believe you are talking about the filter sock on the pump, not the inline filter. no need to change filter sock, the "new" acdelco pump assemblies doent even have the filter socks on them. nor do they even have the provision for one

 

[domin8]

It depends on the year. Newer models don't have stand alone fuel filters. The filter is now incorporated into the fuel pump modular assembly.

 

[Vinniety]

My truck did that once before and it was the mass air flow sensor. I actualy cleaned it with maf cleaner didn't need to change it. After it ran fine I decided to do a sea foam treatment and plus clean out entire throttle body. What a world of difference.

---------- Post added at 09:14 PM ---------- Previous post was at 09:11 PM ----------

He never said it died and didn't start again it's just running with low idle. What was the code it threw?