Gmc 2001 truck won't start

Asked by Aug 08, 2015 at 11:57 AM about the 2001 GMC Sierra 1500 SLE Extended Cab SB

Question type: Maintenance & Repair

2001 gmc Sierra won't turn over/ start

2 Answers

2,605

Make sure the battery is in good condition about 12.4 volts and higher. Then I would check all the fuses! Check to see if there is any engine codes!

Check to see if you hear the fuel pump engage with the ignition key in the, "on" position. That's before starting the car. If you hear nothing, troubleshoot the fuel pump. Check the fuse and relay then check the fuel pressure with a gauge. If you don't hear any fuel pump activation, there will not be any pressure reading. The relay will click when you turn the ignition to the, "on" position. If no click, switch it out with another relay in the fuse box to see if that works. If it does, replace the relay. If the electrics are good, you probably have a bad fuel pump.

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