GMC C1500 No start condition

W

wbowman_77077

New member
Joined
Jan 12, 2011
Messages
5
Reaction score
0
Points
0
I have a GMC C1500 4.3L TBI and when i turn key on I dont get any lights like the check engine, ABS, or airbag system testing light that illuminate and then go off when you first turn on key and engine will crank over but not start, what could be wrong?
 
wbowman_77077 said:
I have a GMC C1500 4.3L TBI and when i turn key on I dont get any lights like the check engine, ABS, or airbag system testing light that illuminate and then go off when you first turn on key and engine will crank over but not start, what could be wrong?
Click to expand...

Check your fuse to your ECM. It may have gone bad from a bad fuel pump relay or pump it self. Good luck and keep us posted and we can go from there. ;)
 
wbowman_77077 said:
All fuses and relays good still not starting.:confused:
Click to expand...

Turn the ignition keys to the run position and probe the ECM fuse terminal for 12 volts with a multi meter. If there is no power there, your ignition switch has gone and will need to be replaced.

Keep up the great work and keep us posted. ;)
 
Molson02536 said:
Turn the ignition keys to the run position and probe the ECM fuse terminal for 12 volts with a multi meter. If there is no power there, your ignition switch has gone and will need to be replaced.

Keep up the great work and keep us posted. ;)
Click to expand...

All fuses under hood have 5 volts or less ECM fuse 1 has 423 mv but none have no voltage and batt voltage is 10.6v because of cranking when the key is in the run position my radio works and my gauges move
 
Last edited:
wbowman_77077 said:
All fuses under hood have 5 volts or less ECM fuse 1 has 423 mv but none have no voltage and batt voltage is 10.6v because of cranking when the key is in the run position my radio works and my gauges move
Click to expand...

Sounds like the ignition switch went bad. What you have described are the symptoms of the ignition switch going bad, you might get it started buy manipulating the ignition switch wire harness at the switch.

Good luck and keep us posted, what year it the Sierra??? ;)
 
Molson02536 said:
Sounds like the ignition switch went bad. What you have described are the symptoms of the ignition switch going bad, you might get it started buy manipulating the ignition switch wire harness at the switch.

Good luck and keep us posted, what year it the Sierra??? ;)
Click to expand...

It's a 95 GMC seirra 1500
 
You must log in or register to reply here.

Share this page



Back
Top