2001 chevy express 3500 no start no link to odb2
June 8th, 2019, 7:12 PM
#11
Now hook the light up to the fuel pump relay, or whatever the diagram says. And so on ...
June 13th, 2019, 11:36 AM
#12
if the fuse that controls the fuel pump electrics is good, the fact that you get noise in the fuel pump when u juggle the ignition key back and forth suggests to me that the fuel pump is not being energized when the ignition key is in 'run.' short? bad ground ?
on my 3500 07 express the ignition switch was finicky and van eventually wouldn't turn on at all, i had to replace the switch. at the same time the obd2 reader under the dash was working only intermittently and with both of these problems being intermittent it was a night mare to diagnose. after th ign sw replace i still had no read from obd2 which the fancy expensive obd2 reader diagnosed as a bad obd2 receptacle.
by the way i swear the ignition switch failed because the spouse carried (past tense) about a pound of keys on the keychain with the chevy key.
on my 3500 07 express the ignition switch was finicky and van eventually wouldn't turn on at all, i had to replace the switch. at the same time the obd2 reader under the dash was working only intermittently and with both of these problems being intermittent it was a night mare to diagnose. after th ign sw replace i still had no read from obd2 which the fancy expensive obd2 reader diagnosed as a bad obd2 receptacle.
by the way i swear the ignition switch failed because the spouse carried (past tense) about a pound of keys on the keychain with the chevy key.
June 13th, 2019, 2:53 PM
#13
That's a good point. I think the ignition switch is a common problem with GMs. You could try skipping right to that.
https://www.aa1car.com/library/ignition_switch.htm
https://www.aa1car.com/library/ignition_switch.htm