2004 Chevy Tahoe car looses all power, then it comes back r

JOEYCHEVY

MEMBER
2004 CHEVROLET TAHOE
V8
4WD
AUTOMATIC
86,000 MILES

Recently my 2004 Chevy Tahoe LT started loosing all power when I would turn the engine off, not even the locks had power. Then just as suddenly all power returned and was fine except for the seat position and clock being undone.

the electrical zap happens rarely when I'm driving but I have no idea what this is. There is no pattern to it at all so i'm a little lost.

sometimes the power is gone for a while others it is only a blink of the eye.

3 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

Very common to have corrosion built up between the two positive cables on the battery (red)(negative and positive )
try this 1st remove two battery cables and inspect clean (negative and positive )

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Wednesday, September 8th, 2010 AT 5:24 PM

JOEYCHEVY

MEMBER
2 POSTS

The battery is the obvious place to start and I have done that piece prior.

I'm hoping for what else it may be. Alternator was fine as well.

From what I have read so far this is not all that uncommon in tahoe's

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Wednesday, September 8th, 2010 AT 5:43 PM

BMRFIXIT

MECHANIC
19,053 POSTS

Check system ready
like next time it happens
check if PCM monitor systems all ready or they say incomplete or NOT DONE (you can do the check with an OBDII reader )
if it say incomplete (not done ) its loosing power to the PCM some how check main ground wire if battery terminals passed and checked OK
if monitors says ready
suspect BCM and need a scanner to complete the test

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Wednesday, September 8th, 2010 AT 6:20 PM