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Had two GM 3500 cargo vans, one a 2002 Chevy Express, the other a 2001 GMC Savannah. Same vehicle different badges. Noticed the keys were a bit similar and found that the Chevy key could in fact unlock the GMC with some wiggling but not the other way around. It did not work in the ignition lock.




Ignition locks were always better machined - the door locks were the first to get loose enough for “alternative keys”

Eventually a screwdriver works for both.




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