Check all of the feed wires that come off the positive side of the battery. A fuseable link may be bad.
SOURCE: 03 Chevy Tahoe Z71 - 4wd not functioning
my son has one and his did that and it was a fuse he put a new one in and it is working good now
SOURCE: Rear Windshield Wiper Problems
Check the wiper motor connection if its touching anything and loose it will automatically ground out and check at connection make sure you put some gel and then snap it in/ Please rate my response thank you very much
No fuse for the switch on the engine although the cluster has a fuse for the instrument gauges
SOURCE: Why is my fuel gauge on my 2000 chevy tahoe moving
you are probably correct. there are two contacts on the level sensor that wear out, which gives you the fluctuating gauge.
SOURCE: 03 chevy z71 cruise contol problem
There are a few things you can try. First, check your
brake lights, if they do not work the problem may be
in the stoplight sw circuit. Also there are 3 fuses you
can check, 1 is a 25amp in the fuse block under the
hood the next 2 are in the fuse block under the dash.
One is the 15amp stoplight fuse and the other is a
10amp turn sig fuse. These fuses are either directly
or indirectly related to the cruise ctrl. Next check the
cruise switchs accel/coast set/resume if either sw.
was sticking in any posistion for 90 seconds or more,
the cruise ctrl. will shut down. There are trouble codes that will set but they won't trip the check engine light. You'll need an obdII scanner to recover
them from the memory. If you don't have one, go to
autozone/napa or advance auto parts they will scan it
free. The codes of interest are po571 stoplight switch
po567 and po568 the cruise ctrl switch's. And any
other codes related to the torque converter clutch -
the speed sensor - throttle actuator control.
Hope this helps. Good luck.
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