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07 Avalanche Electrical/starting Problems

Mossyoakglock

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Mossyoakglock Senior Enthusiast

Mossyoakglock

Posted
Posted

My dad's 07 Avalanche is hard to start. We thought it was the battery and we replaced it. Still didn't fix it. So I thought it was the starter but when he went to get it tested again, the guy said it wasn't the starter. I'm not sure where he got it tested, dad just told me that's what they told him.

 

What else could it be? A relay, the starter connections, plugs, wires? He's gonna take it to the dealer on Tuesday and have them check it out under warranty. I'd like to try to fix it myself if it's something simple so he doesn't have to take it up there, not that it's a bad thing since they treat us great when it comes to service.

 

Any other ideas on what I could check out or what it might be?

 

BTW, it's got roughtly 70K on it.

 

edit: I just searched and others have had problems with it being fuel related; fuel pump, regulator, etc. Where do I need to connect the fuel pressure gauge at to check the fuel pressure. What are the pressures of the system when the truck is off and when it's running?

DofD Senior Enthusiast

DofD

Posted
Posted

Does it just turn over and not catch?

 

If you turn the ignition to the run position, can you hear the fuel pump engage?

 

Once running does the truck idle and run normally? Or does it run rough at idle or under load?

 

Getting the fuel pressure checked would be a good place to start. Though I can't really help on how to do that.

Mossyoakglock Senior Enthusiast

Mossyoakglock

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Posted

It will turn over. If you hold the key and try to start it, it takes about 4 cranks of the start and then it catches and starts fine. Not sure if I can hear the fuel pump, haven't paid any attention to that, but I will next time. It runs and idles smooth once it starts.

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