Question about 2003 Chevrolet Impala
Gm's around this time are notorious for having problems with electrical systems and the factory alarms, you need to look at that issue-
I have personal experience with a 2005 Impala, a 2001 Intrigue and 2003 Grand Am, to name a few in which I bypassed the security module because of erratic things similar to what you are describing. This can be accomplished by putting a resistor in line to the feed from the ignition switch to the module-
Posted on Jan 02, 2011
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Posted on Jan 02, 2017
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