i have a 1997 gmc pickup going down highway it shut down and then i killed battery so bought new one now it cranks but wont start and when battery is hooked up headlights come on and i can not shut them off looks like getting fuel but i also can not get my obd 11 to read anything when plugged in what could it be

i have a 1997 gmc pickup going down highway it shut down and then i killed battery so bought new one now it cranks but wont start and when battery is hooked up headlights come on and i can not shut them off looks like getting fuel but i also can not get my obd 11 to read anything when plugged in what could it be 1 Answer

04 gmc sierra 1500 5.3 died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was zero) anyways checked fire none checked injectors they wasnt working either(built fuel pressure then unplugged fuel relay then turned engine over and the pressure stayed the exact same) i assume it might be the crank sensor but i would think it would throw a code, anyways came back this morning and before doing anything for the hell of it i checked the gas cap and tightened it and it fired up perfect three different times and the last time i let it run and it died after bout 45 seconds (fuel pressure reads 55) and after it died its doing the same thing cranks but wont fire or start 1 Answer

died on me on the highway got it towed home starting going at it, hooked two different scanners to it and not throwing any codes (ecm is working bc the map was reading correctly but also the rpm was...

Just replaced fuel pump on my 1998 GMC chevy cierra z71 4wheel drive truck.. I seemed fine and I drove I a couple days then it quit running. It's getting gas in pump but not presure. What can I do? 1 Answer

Also replaced relay fuse. Help

My 96 gmc sierra does not idle right when I start it but levels out after and it smell like gas why? 2 Answers

When I start it it takes around 5 to 10 seconds to idle right and it constantly smells like gas I wanna fix it but what's my problem?

Changed batterie, when i hooked up driffrent one i started with negative first than positive and now it wont start 2 Answers

I change out a dead battery for a newer one. I started with the negative first than positive, found out that the positive on the battery was a little to thin and it sparked a few time took off bo...