This is about average on my Ford F-250 diesel. Now having said that, my
brothers diesel seems to recover a lot quicker than mine, but I know mine is
good as far as the charging system, belt, batteries, etc...
How long have you had the truck? If it recovered quicker before and
only started taking longer recently, you may want to check all the
connections, clean the battery terminals, check the belt for play, but as
long as it recovers and starts charging I wouldn't worry too much.
I've had the truck about a year and a half. It does seem to take longer to
recover when it's cold and been sitting for a while. Everything is
mechanically sound as far as belts, connections, etc. I imagine I'll just
keep an eye on it.
I recently had my 2007 Chevy Silverado Classic w/Duramax in for the same
It was explained as: starting with model year 2005
A new Regulated Voltage Control ( RVC ) system was incorporated.
It reduces voltage to 12.6-13.1 volts when in the fuel economy mode.
Volt Gauge will fluctuate from 12-14 volts.
I have experienced time frames of up to 5 minutes with indicated voltage as
low as 11.5 volts; than it jumps to 14.8 volts and stays there.
This occurs even at night-time w/headlights/wipers and blower/defroster on.
Document ID: 2000522
2007 GMC w/5.3 about 2k miles. About 1 week ago, hit the starter, not a
sound. Checked the battery voltage it was about 11.0 volts. Connected my
Bat charger for about 15 minutes, fired right up. Voltage now was about
14.3 Immediately took it to the dealer, he load tested the battery 3
different times all passed, the charging ckt also passed. Noted the dash
voltmeter was on the high side of 14 volts on the way home. Next day trip,
dash voltmeter was just above the "mark" between 9-14 (11.5 volts???) for
about an hour of driving and then went right ot the high 14 volt mark. This
"RVC" module behavier seems different, the dealer said my truck was
recalled, while in his lot before I bought it @ 8 miles to re-program some
items to do with the RVC. Also, once the RVC senses a low voltage (whatever
that limit is??) it will not even engage the starter circuit, like my
problem. Headlights dash etc were lit, but starter ....nothing. I just
know it will happen again to me, the dealer said if it does, do not jump it
or charge it, but call onstar and have it towed to them for troubleshooting
in the failed condition.
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