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Old 12-30-2016, 09:11 PM   #10
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 43,624
 

2003 L-Series 3.0L Sedan
Default Re: Key stuck after radio install

Its been repeated many times on these forums to never make new keys from old ones. The best is to have GM make them based on car VIN to eliminate copying used keys. A fas as lock cylinders go, brass tumblers are the mainstay of most locks used everywhere for reliability and long term use regardless of whether or not lube is used. Brass tumblers are less prone to the wide temperature range our vehicles suffer, from subzero Arctic weather, desert high heat/low humidity and jungle heat/high humidity. Ignition lock cylinders have an added feature to prevent key removal in automatics unless the shift lever is placed in Park position. Either an electro mechanical setup is used to coordinate shift lever movement with the lock cylinder position with a gate to prevent key removal or some other way is used. The same design is incorporated in the brake xmission shift lock to prevent shifting into gear unless the brake pedal is pressed. Safety designs to prevent inadvertent engine down while driving whether from poor quality control of lock cylinders or allowing a vehicle to move without the brake pedal pressed when shifting out of Park position. Key removal is restricted until shifting into Park and turning the key all the way to OFF before removal is allowed.

Since retaining the key occurred during battery drain with headlights on while replacing the radio, and not occurring since, this doesn't seem to be a lock cylinder problem. Your choice.

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