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1999 Other GMC Models will not start

Tiny
IMDAD03
  • MEMBER
  • 1999 GMC
  • V8
  • 2WD
  • AUTOMATIC
  • 222,958 MILES
It started a year ago I could start it but could not move the shifter lever so I took off a part that kept the lever from moving I guess it was tied together with the brake some how. Any way it has been starting with a delayed effect when you turn the ignition it takes a long time to start as if it was out of gas or like in my old gmc 1979 pickup the ignition module was bad. But somtimes it starts with in 1 or 2 times it turns over. And now as of a week ago it just suddenly did not start ti was running just 3 minutes before so I removed the starter to have it checked out and it was good, tried a new ignition reley but it still did'nt start put the old one on and removed the ignition switch from column put the same one back in and tried tracing the purple wire from the solenoid on the starter but didn't find and breaks or burns
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Saturday, January 12th, 2008 AT 5:58 PM

13 Replies

Tiny
FLEXY5
  • MECHANIC
  • 512 POSTS
Does it even try to crank? It kinda sounds like a transmission position sensor. Maybe it won't register that it is in park. Try shifting to neutral and see if it starts. Don't forget to hold on the brake or set the park brake (just in case). Post back your findings or other questions if you need more help.

Dave
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Saturday, January 12th, 2008 AT 8:44 PM
Tiny
IMDAD03
  • MEMBER
  • 7 POSTS
Yes I have tried to start in neutral and it still did not start.I also tried moving the truck and putting back in park and still nothing
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Saturday, January 12th, 2008 AT 10:05 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Shop: Mitchell 1 Admin
Date: 9/19/2007 2:26:13 PM

If intermittent stall or no start not duplicated, check for coolant at PCM connector and coolant level sensor connector at recovery bottle.
Coolant level sensor may leak coolant and run down harness to PCM. May need to replace sensor, dry out harness and repair or replace PCM connector.
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Sunday, January 13th, 2008 AT 9:10 AM
Tiny
IMDAD03
  • MEMBER
  • 7 POSTS
Well merlin my coolant recovery bottle is on the opposite side of the engine from the PCM connector
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Sunday, January 13th, 2008 AT 12:01 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
That's OK, because I really don't know what you are driving! This was just a shot if it happened you drove a Yukon. If you can specify your truck, maybe I can look up the right one!
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Sunday, January 13th, 2008 AT 4:01 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
You still have not even clarified if it is a crank no start or a no crank no start. Remember were here to help. Be as specific as you can.
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Sunday, January 13th, 2008 AT 4:07 PM
Tiny
IMDAD03
  • MEMBER
  • 7 POSTS
Hello merlin I just replaced the park/neutral switch and still no crank or start can hear fuel pump turn on, I have power at starter from battery but no power at soleniod with the key in crank position but when bridging power on starter to the soleniod starter engages
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Sunday, January 13th, 2008 AT 4:34 PM
Tiny
IMDAD03
  • MEMBER
  • 7 POSTS
Hello "mastertechtim" its a no crank no start starter is good it engages when power is bridgedover to soleniod and I changed the park/neutral switch today and still nothing I can hear fuelpump turn on but engine will not turn
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Sunday, January 13th, 2008 AT 4:39 PM
Tiny
IMDAD03
  • MEMBER
  • 7 POSTS
Hello dave I changed out the park/neutral switch and still noting what else should I check
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Sunday, January 13th, 2008 AT 4:44 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
You said you replaced the starter relay. Did you check if you had crank voltage at relay with the key in the crank position. Ive had to repair the ground connection on the block for no ground at the starter relay. ****When you crank engine and it does nothing, leave the key in the run position and watch the theft light it should come on and go out after a few seconds, if it just flashed you have a problem with the pass key theft system. Let us know.
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Sunday, January 13th, 2008 AT 4:44 PM
Tiny
IMDAD03
  • MEMBER
  • 7 POSTS
Hello "mastertechtim" yes I said I tried a new relay when I experienced this problem last week and it still would not start so I put the old one back in and it had started and ran all week until yesterday. And today I installed the park/neutral switch with no results still will not start.I just tried your sugestion and watched the security light it came on and then turned off after about 10 or 20 seconds should I install a new starter relay
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Sunday, January 13th, 2008 AT 5:38 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
If the problem seems to change when you switch starter relays, that goes back to the problem ive seen which is the ground being bad at the starter relay. Id double check the ground. Remember if you have power at the relay and not a good ground, it will not trigger the relay. Try tapping the relay when someone is is holding it on crank and see if that jars the relay and it cranks. This will help you determine if its the ground. Or do a voltage drop test on the ground but that might be too difficult to do unless you are real familiar with a multi meter. Keep us posted.
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Sunday, January 13th, 2008 AT 6:59 PM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Check these fuses again! In the cab, #8, under hood, IGNA, and IGNB


https://www.2carpros.com/forum/automotive_pictures/62217_Fuses_3.jpg

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Monday, January 14th, 2008 AT 8:16 AM

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