Question about 2000 GMC Jimmy
First thing I would do is to put an OBDII reader on it and see if any codes are being stored in the ECU. Just because the engine light isn't on, doesn't mean it's not throwing out codes.
Some other things to take into account is when the last tune up was done on the vehicle. If the plugs are original they may be ready to be changed, Your igniters (Coil Packs) may be throwing weak spark. If you have over 100K on the truck, you're fuel pump may be getting weak or at the very least the fuel filter may be getting clogged. Just some things to think about, but definitely pull the codes, if there are any it will lead you in the right direction of either an electrical problem or a fuel problem.
Posted on Dec 13, 2014
Something here doesn't make sense. If it is longer than 9 - 5, it won't start easily. Yet from 5 til 9 the next day, it has no problem? Can you give a little more specific detail?
Posted on Dec 10, 2014
Are you saying that the starter motor turns the engine over properly but will not start if truck sits for a period of time; But will start if that amount of time is less? If such is the case there is a common fault that may be the reason;The wiring to the coil and/or chassis/engine...The pink wire from the coil to the under-hood fuse block on connector C2-Pin B-10 may be corroded or loose...with an ohmmeter set on lowest scale measure continuity between the mentioned points...Must read close to zero ohms...Then measure from the negative battery post to bare metal on engine block and fender...both must read zero ohms...If you read high (2000 ohms) on any of these three points tell me and I'll take it from there...This may not be your fault but it needs to be eliminated up front...saailer
Posted on Dec 08, 2014
Testimonial: "i give it a good tune up and that seems to have fixed it.i believe everything was still factory.dad said he never had it done.so lasted a long time"
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Posted on Jan 02, 2017
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