2001 Blazer Vortec V-6 75,000 miles clean as a whistle. Seems like it's not getting a steady supply of fuel but it runs fine if you are stepping on the gas. There is a slight flicker to ALL lighting occasionally. Not enough to totally lose lights but for maybe 1/2 a second. Battery cables are clean and tight. Won't sit and idle must keep fluttering gas pedal. I've got no clue. HELP PLEASE! Just went out and started it started fine ran fine. Then I shut it off and turn the key and no electricity at all. What electrical component do I need to look at seems like it's a main breaker or something.

 

I would check, clean, and dielectric grease all your main grounds and positive cables before anything else. It's extremely likely your issue is caused from one(or more) of them

Main grounds:
-battery to rt frame rail
-battery to rt side of rad. Support
-battery to rt front of engine block
- engine to body(back of the pass. Side head to firewall)
Also check your fuel system grounds, they bolt to the top of the crossmember that your rear shocks mount to

-Main power to master fuse(under batt tray)
-Power from master fuse to Underhood fuse box
-power to alternator
-power to starter solenoid.

 

Thank you so much. I will definitely check the + grounds. I would have never thought about them. I'll let you know how it goes.
Again, Thank You!

 

No problem, keep me updated