2002 Chevy Tahoe returned from the dead

Tiny
CHRISTOPHER.NILSON
  • MEMBER
  • 2002 CHEVROLET TAHOE
  • V8
  • 2WD
  • AUTOMATIC
  • 105,000 MILES
Wife complained truck would not start. Opened up the door and noticed that the dome light was on so I assumed the battery was good. Turned the key and got nothing but a bunch of clicks from under the hood. After another attempt at starting it the cooling fan started up and turned on and off several times and continued after I removed the key. Tried starting it again and it started. When I returned home from work that evening I figured that I would check it out again. This time when I opened the door not one light came on. First attempt to start the truck was not successful. Each time I turned to key to the 'on' position something would start to work. First the 'service engine soon' light, then the a/c fans, dome light, then finally everything came on. I tried to start it a second time and it started but idled very rough. After about a minute it was running smoothly. Turned it off and it started up no problem. It does have a half second starter lag when first cranked but always starts. About a month ago I got a knock sensor warning but has gone away after filling up with premium.
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Tuesday, December 2nd, 2008 AT 8:39 PM

5 Replies

Tiny
JAMES W.
  • MEMBER
This may sound a little over simplified, but do you have a battery or body ground cable that's arcing? Please advise.
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Tuesday, December 2nd, 2008 AT 9:28 PM
Tiny
CHRISTOPHER.NILSON
  • MEMBER
Not the battery. Not sure about body ground cable though. Lot of activity coming from the fuse box when I tryto start it. I didn't notice any loose wires or connections anywhere in the fuse panel. Is that where I should be looking?
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Tuesday, December 2nd, 2008 AT 10:14 PM
Tiny
JAMES W.
  • MEMBER
Most of your main power feeds come from where the battery positive cable attaches to the starter solenoid. Check to see if these connections are clean and tight.
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Wednesday, December 3rd, 2008 AT 12:13 PM
Tiny
CHRISTOPHER.NILSON
  • MEMBER
I cannot find any loose or corroded connections coming off of the battery. Do you think it could be as simple as a bad battery or overcharging alternator?
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Thursday, December 4th, 2008 AT 7:40 AM
Tiny
JAMES W.
  • MEMBER
Yes, it could be battery/charging system. You can check both with a volt meter as follows:
Charging system: With engine running all accessories off, test accross both battery terminals. The voltage should be between 14 & 15.5 volts. If the voltage is outside of this range, alternator is bad.
Battery: Engine off, volt meter, again, on battery terminals. Crank engine. Voltage should not drop below 12 volts. If engine starts too soon the get an accurate reading you may have to pull the fuel pump relay so it won't start and cranks longer. Let me know.
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Thursday, December 4th, 2008 AT 10:15 AM

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