Intermittent failure to start?

TOM DRUSE

MEMBER
2004 CHEVROLET SILVERADO
V8
4WD
AUTOMATIC
63,000 MILES

It has failed to start about 5 times in the last week. I think that when I put the key in the ignition the lights and guages don't function until I turn the key all the way to engage the starter. The engine turns over, fires, the lights and guages, activate for a second and then the lights go out, guages never get so they're reading and then I believe I see the dash dark except for the battery light and maybe the Lock in the upper left of the instrument panel. I then can repeat the process over and over. Sometimes I can wait a half hour put the key in and it functions fine and I can drive 50 miles with no issues. Got home today and tried another key and it was fine. Thought maybe the key was the issue. Then went back to original key and that also worked fine. Also when I work the air and fan I smell a hot electical insulation odor. A wire or module under the glove box feels hot. I bought truck used and don't have the manual. Will try and check codes tomorrow.

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

It sounds like you might have a intermittent issue with the ignition switch.
The ignition switch is the electrical switch that the lock cylinder attached to.
There are many pins in that switch, over time they can corrode or wear off and can trigger starting issue as well as all the components that it controls, like the dash light, radio etc.
In order the replace the ignition switch you will have to remove the steering wheel.

Here is a helpful article:

https://www.2carpros.com/articles/steering-wheel-removal

I have attached the diagrams for your reference.

Please let me know of any questions.

Thank you.

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