87 k5 blazer wont start

[oneluckypops]

when i had my 87 i had the same damn issue. my problem was the damn plastic tank selector valve bolted to the frame on the passengers side(were the bed and cab meet) i accidentally hit the tank selector switch to the tank i don't use and i flipped the switch back but the valve got jammed to the side not in use, inturn sending power only to that side. i tested with my multimeter the entire system i was getting power all the way till the valve. i pulled the plug for the sending unit on the tank i use but no power.... tested the other side that i dont use and bammm power so i bypassed the valve completely

WOOOOOO the OP didnt say anything about having dual tanks. If he does that is defintly something you need to look at. check for power and grounds both inlet and outlet

 

[kleedus]

i have never seen a blazer with dual tanks.

i did not read this whole thread but did you check the fuses there is a fuse that act like that when its blown?