Question about 1999 GMC Jimmy
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Posted on Jan 02, 2017
SOURCE: will not start
have you tested the fuel pump yet? you do not need to remove it to do so.
if you have not tested the fuel pump yet, test for fuel pressure at the fuel test port on the fuel rail. if you have no fuel pressure, then test for voltage at the fuel pump fuse and relay. if all is well, and your final test for voltage at the weather pac terminal above the tank is good, then you should replace the fuel pump assy, or the wire leading to the pump itself in the tank. 99-01 gm vehicles have a poorly constructed fuel pump wire which tends to cause intermittent connectivity.
to get to the fuel pump, you will need a fuel line tool ( cheap and redily avail) used to diconect the snap over lines from the pump assy. there are two large straps holding the fuel tank in the vehicle, and the tank will need to be removed in order to get the pump assy out. there are two weather pac terminals on the top of the pump assy, and two fuel lines that will need to be removed. finally, the pump is held in the tank by a snap ring. after removal of the snap ring, the unit should lift easily out of the tank.
Posted on Jan 21, 2009
SOURCE: 2001 gmc jimmy not starting
Did they do a fuel pressure pressure test to determine that its fuel pump? And if so what was the p.s.i.?It should be around 55 to 60 p.s.i. a few pounds under 55 p.s.i. Pump needs replaced, Your shop should have chk. this when it was there the first time. Did they by chance chg. the fuel filter, that can hinder it from starting too.
Posted on Feb 14, 2009
Testimonial: "it was the fuel pump thank you"
SOURCE: remove airbag 99 gmc jimmy
I actually just took mine out today on a 1998 Gmc Jimmy. Its kind of simple now that ive done it. There are four ten millimeter bolts holding the passenger module in. you will need to drop your glovebox down so it is upside down to see these. It is easier if you take it right off. just take a shop light and look at the bottom of the module you will see two silver bolts (the only two ten mm down there) take them out. Then if you look up underneath you will see another up at the top left. To get this out you can hand wrench it or you can use a mini impact with an ajustable extension. to get the next the easiest way I found was to take off the trim aroung your speedometer get in the drivers seat and there is another ten millimeter nut on the top right (right by the vent holes) take that out then you are unbolted. Without going into tons of details when you start doing it you will quickly realsie how to do it it just takes some patience. Dont forget to pull the fuse before you do anything its a 15 amp fuse second row 3rd up in the panel inside the car. Hope this helps
Posted on Mar 04, 2009
try the oil pressure switch, that was a common problem on Gm trucks when I used to work on them, the oils switch was bad and woulden't allow it to start and the ones I worked on were on the back of the distributor.
Posted on May 29, 2009
SOURCE: 2000 GMC Jimmy won't start
i had the same problem and replaced the fuel pressure regulator. Cost about $45 at advance auto store or about $90 at napa auto stores. Once i replace that my truck started right yup and runs like a champ
Posted on Jul 13, 2009
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