Question about 1989 GMC Sierra
I had similar problems with my surburban run then com back out act like won't start replaced had to replace fuel pump haven't had anymore problems yet
Posted on Feb 08, 2012
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Posted on Jan 02, 2017
SOURCE: I HAVE A 1991 GMC
If you are getting spark then it may be a fuel pump problem or fuel pump relay or inline fuse. Always start Fuel system troubleshooting by replacing the fuel filter or filters! You may be able to apply 12 volts from the battery (use a fused line) directly to the 12 volt side of the fuel pump and listen to see if the pump runs. Also may need to check that it is getting a good ground to the fuel pump. Then if the fuel pump does not run independently, replace the fuel pump. The fuel pump relay is computer controlled and several other things give the computer inputs which then controls the voltage to the fuel pump relay.
Posted on Jan 17, 2009
The GMC 1500 Sierra have several engine sizes, hope this helped...
1992 GMC C 1500 P/U 2WD 4.3 liter V-6 VIN "Z"
1992 GMC C 1500 P/U 2WD 5.0 liter V-8 VIN "H"
1992 GMC C 1500 P/U 2WD 5.7 liter V-8 VIN "K"
Good luck, and remember rated this. TY for using Fixya.
Posted on Mar 31, 2010
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