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Gary, ASE Certified Technician
Category: GMC
Satisfied Customers: 17157
Experience:  GCM master tech over 25 years
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2004 gmc cargo van savannah. Won't turn over. Intermittent,

Customer Question

2004 gmc cargo van savannah. Won't turn over. Intermittent, new starter. Same issue no code.
Submitted: 2 years ago.
Category: GMC
Expert:  Gary replied 2 years ago.

I am sorry your having this problem

does it act up enough to do a few tests with a multi meter or test light ?

Customer: replied 2 years ago.
No used a new key and it started right up. One person says it's a security system issue one says it's a worn key issue. Van did not throw a code.
Customer: replied 2 years ago.
It happened twice this week. But it been quite a long time since the last time it acted up. We have two keys that the guys use. It it possible it's a worn key issue?
Customer: replied 2 years ago.
One guy says it sits long enough for the security to reset it self. Does the security reset it self?
Expert:  Gary replied 2 years ago.

this issue can not be a security issue as when the security system is activated it will NEVER stop the engine from cranking over

it will just shut off the fuel injectors

then these will NOT crank over physically with a new starter and the battery cables are clean and tight these issues come down to a bad starter relay or terminals for the starter relay or bad ignition switch

the ignition key or lock cylinder itself should not be causing this issue

Customer: replied 2 years ago.
what if the key is worn, will the security system reconize that the key is valid?
Expert:  Gary replied 2 years ago.

no as the security system will never stop the engine from physically cranking over it will just shut off the fuel injectors when triggered

'if it is not cranking over physically it can not be the security system and most of these we have had with this issue where ignition switches or the starter relay or the terminals in the under hood fuse box the starter relay plugs into having bad connections and neutral safety switch failures on the drivers side of the transmission not telling the system the van is in park when in fact it is in park

if you can get it to act up we need to know if your fingers are on the starter relay when holding the key to crank do you feel the relay click with your fingers when turing the key to crank ? and also does the fuse called CRANK in the under hood fuse box show 12 volts when you hold the key to crank when it will not start ?

Expert:  Gary replied 2 years ago.

how are you making out ?