i have an 87 gmc surburban 1/2 ton 2wd 5.7 fuel injected. the other day i went to the store got what i needed to and came out. got in the burb and tried to start it and all it did was turn over. i took the air cleaner lid off and the coil to dist. wire off and it had no spark and no fuel. after i towed it home i started to dig in to it. i have checked all of the grounds, fuses, and i replaced the ingintion switch. i am thinking that it is a ecm but i don't know. i also know that the fuel pump doesn't turn on cause i can hear it when it does.
thanks chris