I have a gmc 1997 suburban, when you turn ignition it will not start, even changed out the batter. I also opened up the fuse box and switched the ac fuse with the starter fuse and still nothing. Any suggestions?
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Re: will not start
Is the engine spinning over,,or is the starting system not turning the motor at all? If the engine turns over with the key,but does not start, you need to check to see if the engine is getting fuel, can you hear the fuel pump whirring for a couple of seconds when you turn the key to start(sometimes you need to do this when its real quiet) have someone turn the key while you go under the rear or side near the fuel tank, and listen. If you cannot hear the pump running chances are that the pump needs replacing.
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look on the firewall above the ac for a black cover, remove it... I cant remember if they still used them or not but they're called fusible links.... Fuses made of wire smaller than the main wire. these links are designed to blow in the even something causes the wire to overheat...
You still safe there is three area that are protected when this happens , the fuseable link opens up, in the fuse box the ignition fuse, in the batter juntion box a fusable link or omega fuse, and starter fuse, 1990 suburban look at the starter for the omega or fuseable link
When you initially turn on the ignition switch,(before engaging the starter) do you hear a humming sound from the rear of the vehicle for about 3sec's? (sort of like a motor running) If not, you have a bad fuel pump. (The fuel pump is located inside of the fuel tank)
I the fuses and relays are good for the pump it could be a bad pump especialy if you was having starting problems make sure you have power to the pump. Also do this before changing pump.
Put your key in turn it on dont start wait 10 mins remove key wait 10 seconds repeat this a total of 3 times. If that dont work try a different key do the same thing. This relearns your key to the ignition it started with Gm cars and trucks from 1999 to to 2006. It is a big problem but there is no recall that I know of. If that dont work a dealer needs to probably replace and reprogram your ignition switch and keys
If you have a 1996 Suburban that will not start. The first place I would start is take the screws out from the cover under the ignition switch and replace the box with all the wires. That box when bad will cause all kinds of things to happen...Truck not to start. Shifts darn hard from 1st to 2nd gear. Wipers to not work at time or the wipers stop and go. You will not get the impulses to even register on a tester. After hooking up to a computer I could not get anything to register on the tester/computer as I was turning over the motor with the ignition switch...Next I decided to turn over the motor with the ignition switch and wacked the bottom of the stiring column and the puter screen cam to life....Replaced the box and never had a problum in 4 years and my truck transmision dont slam gears any more.
Hope this helps.
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