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2005 Trailblazer Ls 6cyl 4.2. Won't start

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wont start
1K views 5 replies 3 participants last post by  bennett.deborah15 
#1 ·
So ours broke down, it won't start now. When we do try to start it, all you hear is a click. The headlights do come on, the radio comes on, but the dome lights don't come on and the driver's side window won't roll up. We have replaced the battery, the main fuse to the battery and we have a new computer in the truck. What else could be wrong with it?
 
#2 ·
Replacing the engine computer nearly always requires a 30 minute security relearn procedure. Did you do this?

Where does the click sound come from? We need the exact place, like say a relay in the underhood fuseblock or the starter motor.
 
#3 ·
Yes my husband did the security relearn procedure. After he did that, the only thing that happened, he was able to roll up the driver's side window and the doors did lock with the key fob finally except the driver's door. And the click noise sounds like it's coming from the starter motor.
 
#4 ·
Check the ends on both battery cables. If there is any green grunge, they need to be replaced.

Also, if you have a digital multi meter (DMM) check the voltage drop on both battery cables. Also, make sure the battery cables are tight and not loose at the battery.
 
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