Problem with my = 2001 Chevrolet Malibu 3.1 V6.
Service vehicle soon, check engine code P0442.
The intake manifold gasket was replaced about 2.5 months ago.
Question = About 2 weeks ago the service vehicle soon light came on, but it would clear when car
was restarted. Yesterday, dash would not light up and auto head lights would not come on
immediately after car was started, but everything would start working after a few seconds. Now
various warning lights will stay on and gas gauge will not work after a start, but everything then
starts working after a few seconds. Now the check engine light is on with a code of P0442. These
problems do not occur each time the car is started. A different combination of head lights not
working or warning lights occur each time.
Answer:
Be sure to check that the battery cables are tight on the battery, and then follow the ground cable
down to make sure it is clean and tight. There are also several grounds on the transmission - engine
bellhousing.

Sounds like most of the electrical problem are related, except for the Check engine light, code
P0442 is a small leak in the
Evaporative Emission System. Possibly a bad vent valve in the back, or
a fuel tank sending unit seal leaking.

The electrical problems may all be related to the Body Control Module. This BCM controls the
functions of the things you are having problems with. Also could be the ignition switch. The ignition
feeds power to many of the cars systems, including the lights you have problems with, and the BCM,
along with other things. If there was a problem internally to the switch, you would loose power or
have low voltage to these areas.

I would also start pulling on various wiring harnesses to check for a loose connection that would
effect all these systems.
2006 Chevy 6 CYCLE
Warning lights = LIGHT ORANGE
Repairs = GAS CAP LIGHT COMES ON
Question = what does it mean when this light comes on?  How do I get to fix it? Thanks.
Answer:
If you're sure it is the gas cap light coming on, it usually just means you need to tighten the gas cap.
This light will come on if the emission control system cannot make a good seal on the system and the
most likely thing loose is the gas cap. Easy fix. But if there were a leak in the evaporative emissions
system that causes a large leak, the computer could view this a loose or missing gas cap. It would give
the same conditions of a large leak as a failed part that causes a large leak. A scan of the system and
testing for leaks is what is needed. You could have a bad
EVAP vent valve. This would also cause a
large leak that the computer may see as a loose or missing cap.
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Chevy Malibu P0442 Small EVAP Leak