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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15133
Experience:  GM Grand Master Technician 2007. 14 years experience.
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Chevrolet Colorado: Chevrolet colorado 2005 won't start.. I

Customer Question

Chevrolet colorado 2005 won't start.. I see a key and a lock on dash which could be the antilock... Anybody can help me on out to unlock it ?
Submitted: 6 months ago.
Category: Chevy
Expert:  Jared D replied 6 months ago.
Hi,The lock symbol on the dash typically indicates a problem with the security key system. It is designed to receive a signal from the ignition key to turn off the security system and allow the engine to start.The first thing to try is a spare key. This would tell you whether the problem is in the transponder (the chip in the key), or the transducer (the box under the dash that receives the signal).
Customer: replied 6 months ago.
A chip in the key.. Its a regular key i dont think it has a chip
Customer: replied 6 months ago.
It was working fine just days ago
Customer: replied 6 months ago.
A mechanic replaced the engine and after that truck wont start
Expert:  Jared D replied 6 months ago.
What does the key look like? Just a basic metal key or the black plastic style?
Expert:  Jared D replied 6 months ago.
Will the engine crank and not start or does it just do nothing at all?
Customer: replied 6 months ago.
.
Customer: replied 6 months ago.
E
Customer: replied 6 months ago.
The lock simbol is not flashing
Expert:  Jared D replied 6 months ago.
On the other side of the key is there a small + symbol with a circle around it right where the metal goes into the plastic?
Customer: replied 6 months ago.
No it doesnt have any signs
Customer: replied 6 months ago.
Just the plain metal
Expert:  Jared D replied 6 months ago.
Will the engine crank but not start or does it not do anything at all?
Customer: replied 6 months ago.
It doest do anything at all
Customer: replied 6 months ago.
Just like if didnt had a battery at all
Expert:  Jared D replied 6 months ago.
Do you have a multimeter to do some testing?
Customer: replied 6 months ago.
I do
Expert:  Jared D replied 6 months ago.
Are you getting any communication with the PCM with a scan tool?
Expert:  Jared D replied 6 months ago.
Check for 5 volts on the White/Yellow wire at the ignition switch terminal 5 with the key in the start position. If there is 5 volts at terminal 5 at the ignition switch, check for voltage that is less than 5 volts at terminal 4 on the ignition switch White/Blue wire. The voltage will vary depending on the resistor in the ignition switch. If there is 5 volts at terminal 5 but 0 volts at terminal 4, replace the ignition switch.
Customer: replied 6 months ago.
Will do
Expert:  Jared D replied 6 months ago.
Let me know what you find, and whether you are getting communication with the scan tool.