Is the theft light flashing fast when you turn the key to the ON
position? If you hold your foot on the gas will the engine start and
run?
The problem you are having is usually caused by one of the following:
1.
Fuel pump. When the problem is happening listen for a whine in the tank
behind the rear axle. Try banging on the fuel tank with a rubber
mallet.
2. Fuel pump and PCM/EEC power relay. Tap on those relays in the relay box next to the fuse box under the hood.
3. Crank sensor. Wiggle the connector on the sensor located next tp thecrank pulley behind the a/c compressor.
4. Idle air control valve. Tap on the IAC located on the back of the intake.
And re-check to make sure that the inertia switch in the trunk did not trip.
Also make sure that the theft warning light is not flashing rapidly when
you turn the key to the ON position.
Hope this helps; keep us updated.
RepairPal Expert Overview:
The RTV seal on the fuel system control modules may allow water
to enter into the module. Water in the module can cause a short, which
may cause hard starting, a crank-no start condition,
or stalling, and the Service Engine Soon light may come on. If the
engine stalls unexpectedly, there is an increased risk of a crash.
Dealers will replace the fuel system control module free of charge. The
recall began on May 18, 2009. The GM recall number is 08411.
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