Why doesnt my trailblazer crank as it should?

Asked by Terri Sep 10, 2019 at 09:13 PM about the 2008 Chevrolet Trailblazer

Question type: Maintenance & Repair

On some days it starts fine. Somedays I have to
turn the key 5 times to start. I get the clicking
sound as if the battery is dead. But it starts.
Yesterday after i got out. All was completely dead.I
played with negative on the battery and all power
was fine. The issue seems intermittent to me. I had
a alternator test right after a jump. I was advised
the alternator. But what bothers me is why if i adj
the negative cable I'm fine?

2 Answers

12,465

tin/ antimony batteries will last perhaps 5 years, they are not Deep cycle~ but you know connections can get corroded just from normal thermal cycling, that one to the fender/chassis is important, Black three connections, to the motor, to the fender/chassis and to the always on Clock and flashers~ see if you can make them connect without trouble~ have seen it where it is no use, the motor is soon locked completely up~ have you done periodic oil changes? just askin'

275

You know since you can move the cable and it starts, it almost sounds like a build up of corrosion possibly under your negative cable or inside the cable itself. Disconnect the batter Negative cable first. See if the posts on the battery are corroded, cables too. If that works great! if not, I have had to cut the end off of one of my cable before and replace just the end. See if there is any corrosion in the cable itself. If so, replace it or replace the entire cable itself if you feel comfortable doing that. If you do just the end clamp, get some cable grease from your local parts store. Disconnect the battery, negative cable first. Cut off the suspect cable end. Strip back the insulation only far enough to go into the new clamp hold down. soak the end of the cable in warm water with baking soda until it stops fizzing. Blow the water out of the end and spread the strands into a fan shape. Brush them with a clean wire brush. Apply the terminal grease onto the strands. Twist them back together and attach the clamp. Connect your battery cables positive first. See if that was your problem. Hope this helps

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