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Tracy Martin TN 
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Joined: 11 Sep 2009
Location: Gallatin,TN
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 Topic: Need help 99 GMC
Posted: 09 Jul 2018 at 9:30pm |
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My truck won't start. Dash lights and all work. Will not even click starter. Did this a month or two ago. I used other key and it started right up. Does have the security system on it. It acts like it doesn't recognize the key. What is most likely culprit? Thanks, Tracy
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10830
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Posted: 09 Jul 2018 at 11:24pm |
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My truck is at farm. Had to get Hannah to come pick me up. Hopefully someone will know what is wrong. Any help appreciated. Thanks Tracy
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Dakota Dave
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Location: ND
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Posted: 09 Jul 2018 at 11:37pm |
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If the security system locks you out it'll still crank but not start and the security light will be on. You can reset it by turning it to run and leave it there for 10 minutes don't try start. Turn key off to lock for 10 seconds and back on for 10 minutes of for 10 seconds and on to start. But if it's not cranking first place I'd look is test light to starter soloniod. Should have power continuously to the big lug and power to the small lug when key is it start position.
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bobkyllo
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Location: minnesota
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Posted: 10 Jul 2018 at 12:28am |
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Dave is correct with the starter. I have seen the key switch go bad in that era pickup often though. But start with the starter first.
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Tracy Martin TN
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Posted: 10 Jul 2018 at 8:01am |
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Can I jump start across solenoid in this condition to get it to a shop? Thanks Tracy
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jaybmiller
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Location: Greensville,Ont
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Posted: 10 Jul 2018 at 8:07am |
I'd doubt it... IF the security system was properly programmed, it'd kill power to the fuel pump and the coils,both are electrically controlled by the 'computer'.
Mind you what it really does is anybody's guess. try it, see what happens, just be careful of sparks.
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fixer1958
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Posted: 10 Jul 2018 at 8:52am |
Why not. It will either start or it won't.
If it cranks and not start that's one clue eliminated. If it won't crank at all it's the starter or a power/ground issue.
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Dakota Dave
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Posted: 10 Jul 2018 at 9:05am |
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The pass lock system has nothing to do with won't crank. It just shuts down the power to ignition. No ignition no fuel no start it'll crank till the battery goes dead. If it was the pass lock the security light comes back on after you start cranking the engine. Turn the key on and jump the starter solenoid. If it turns over it'll start. If it dosent wack it a couple times and try again. If you can get help have them hold the key in the start position and wack it. Then take it to the shop and change the starter.
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Coke-in-MN
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Posted: 10 Jul 2018 at 9:30am |
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The starter solonoid does not have a separate ground like old systems do but grounds through starter brushes - So you will not get the clicking of the starter solonoid or the pull in of drive one is use to hearing in older vehicles .
The starter brushes are held onto a plastic holder which if brushes are worn down the plastic will hit armature first and prevent engagement of solonoid circuit . It might be intermittent and sometimes wrappin on starter will allow it to work - until next time - or a dead starter is the outcome .
Sometimes a worn starter bushing in end cap will cause the armature to move enough to cause the problem . Replacing the end plate and new brushes should solve the problem
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
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Posted: 10 Jul 2018 at 10:06am |
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Just so everyone is on same page....... truck would not crank over or start. Dash lights, bells and buzzers all worked. Never done this exact thing before. I don't think I have ever replaced starter, but not for sure. Checked and cleaned battery terminals before coming home last night. I will rap on stater and see if that helps tonight. Hopefully something simple to fix. Thanks for the help, and more is welcome also. Tracy
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HD6GTOM
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Joined: 30 Nov 2009
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Posted: 10 Jul 2018 at 3:09pm |
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Tracy from experience running a shop. If it is the starter, either take yours to a reputable rebuilder or buy a new one. I have seen way too many of the rebuilt ones fail way too soon.
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Tracy Martin TN
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Posted: 10 Jul 2018 at 8:13pm |
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Got to farm, put the key in, turned it nothing. Did it a second time and it started right up. Have stopped and started it several times. Can't tell any thing ever happened. Hope it doesn't strand me somewhere.If it happens again, maybe I can pinpoint the exact problem. Thanks for all the help. Any suggestions welcome. Tracy
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No greater gift than healthy grandkids!
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jaybmiller
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Location: Greensville,Ont
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Posted: 10 Jul 2018 at 8:53pm |
I'm thinking either bad(gimpy) ignition switch or gear shift PRNDL switch. It's common they just wear out, or get misaligned and not make proper electrical contact, so a little jiggling here or there and 'magically' it works.... When you think about the use/abuse switches take year round, well anything that old SHOULD have failed by now !
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
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tadams(OH)
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Posted: 11 Jul 2018 at 1:43pm |
Yes I would check the safety switches
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Steve M Ind
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Joined: 12 Sep 2009
Location: Springport IN
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Posted: 12 Jul 2018 at 7:50am |
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With the key turned to the run position the "security" light should come on then go out in a few seconds. If it stays on or flashes then you have a security problem. Most common security problem is the pass key sensor located in the steering column.
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