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GMC Yukon Start Stall Idle Problems

48 messages,  Last post on Sep 17, 2009 at 12:59 PM

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What is this discussion about? GMC Yukon, GMC Yukon Denali, GMC Yukon XL, SUV

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#9 of 48 Re: 93 GMC YUKON [jcanbounc] by stormnn Apr 27, 2008 (2:32 pm)
Replying to: jcanbounc (Apr 13, 2008 4:07 pm) Did you change the spark module under the rotor? My 93 did the same thing. Replies to this message: popo111 (Apr 28, 2008 2:22 am)
#10 of 48 Re: 93 GMC YUKON [stormnn] by popo111 Apr 28, 2008 (2:22 am)
Replying to: stormnn (Apr 27, 2008 2:32 pm) I have not. I will be bringing it in this morning and maybe that info will help. I appreciate it. I will post the problem and resolution when it is completed. Thank you.
#11 of 48 outcome.. by popo111 Apr 28, 2008 (8:41 am)
OK....I took the Denali to the shop and they fixed it. It actually stalled once on the way there and tried twice at stop signs. It turned out to be 'the throttle body was sticking'. They cleaned it and $150.00 later, It is working again. Thanks again fro your help and maybe this info will help someone else.
#13 of 48 99 Yukon wont crank by slywuf May 04, 2008 (7:21 pm)
I need some in depth technical help please - here's the long sad story in 3 part harmony: Recently this Yukon (5.7L Auto Trans) would start fine in the morning, drive fine to work, start up fine after work, but shutting it off 1/2 hour later and trying to restart again would get no action from the starter at all. Let it sit and hour and then it started up fine. Happened again the next day only this time it took 2-3 hours before it would restart. I thought the starter was the culprit, so spent big bucks on a new starter and put it in. It started up just fine but the next time it was driven for a while and shut off for about 30 minutes, it would not restart again... not even after waiting more than 12 hours. Here are the results of some testing that I have done:   No check engine lite was ever present, and plugging in my OBD2 reader showed no error codes. Security light seems to function normally - stays on for about 5 seconds after turning on the key and then goes off. The fuel pump does run when the key is turned on. The fuses are good. The starter relay is good. Jumped across the output terminals of the starter relay socket and the starter cranks fine, motor starts but will run for just a couple of seconds. The ignition switch on this vehicle was just replaced about a year ago. According to the factory manual that I have, there is supposed to be a ground present on one side of the starter relay (coil side) this is pin 85 on the relay, and then when the ignition key is turned to start, there should be +12 volts on the other side of that relay coil which is pin 86. I dont see either when I put my meter on there. The diagnostics dont appear to take into account the theft deterrent system, which I suspect may be the reason. Should I be able to see theft deterrent trouble codes with the OBD2 reader as well? I tried adding a ground to pin 85 of the starter relay but it still wont start. What else can I do to figure out what is keeping the starter relay from working? Is there a way to bypass the theft deterrent system? HELP ! I'm stuck. Thanks in advance. Replies to this message: emart1 (Mar 29, 2009 4:22 pm)
#15 of 48 my 1999 just started acting like it has aghost and wont strart by chennigan May 09, 2008 (3:09 pm)
ive been driving my denali for about a year ,no probs,yesterday i went to go to work and the dash went crazy weird crazy and starter just clicks sometimes,sometimes nothing not even dash lights i think it might be the ignition switch because if i play with the key sometimes the dash works normal till i touch the key again to try to start it and it goess half dim and freakn out gauges...HELP
#18 of 48 GMC Yukon Won't Start by jmuncan Sep 15, 2008 (6:55 pm)
I have a 1999 GMC Yukon that will not start. The battery is not dead, but the engine will not crank over. I have voltage up to the fuel pump relay. I think it may be an electrical problem. Does anyone have any idea what is going on? It is now going on 3 days....... Replies to this message: heazzz (Mar 07, 2009 1:41 pm)

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