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1999 GMC Sonoma pickup truck is blowing ignition fuse and will not run without putting in a new fuse I had to get new alternator put on and after that is when it started blowing fuse

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The out put amp not the alternator could be the problem.. I would take it back out and have it tested.. and replaced.

Posted on Apr 22, 2017

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When I put on my headlights the running lights in the tail lights go out it blows a fuse 1999 gmc pickup dash lights go out to


check the trailer harness if your truck came with trailer package those harnesses are known to go defective. do daytime running lights work?

Feb 07, 2015 | 1999 Chevrolet K1500

1 Answer

1996 GMC SONOMA AIR BAG LITE ON AND BATTERY GAUGE NEDDLE CHARGING ALL THE WAY OVER


code DTC 1351 ICM IGNITION CONTROL CIRCUIT HIGH INPUT CONDITIONS.check alternator out put at the battery while vechicle running should have 13.5 - 14.5 volts. if not alternator failing which will cause ignition problems and other problems. if alternator okay let dealership fix because faulty airbag is dealership fix.

Sep 17, 2012 | GMC Sonoma Cars & Trucks

1 Answer

Won't start


Check the fuel injectors, with the key on one side of the two wire connector will have battery voltage, if none is present then check the ECM fuses in the underhood fuel box.

Jun 22, 2017 | 1999 GMC Sonoma

2 Answers

Battery light is on.


I would say it would be the alternator. Most local parts stores can test the alternator. But when the battery light is on, it's usually the alternator. I would check the fuses for a blown one.

Jun 09, 2010 | 1999 GMC Sonoma

4 Answers

Battery light still on after changing alternator and battery.


Did you check the fuses? Are your cables to the battery corroded? Is your ground wire connection clean . Did you get a cheap-*** alternator? Did they check it where you bought it? You may have to have it checked at a napa or other store. Sometimes "reconditioned" means "repainted"
Hey, I've been there. If its a discount store alternator get another place to check it. May save you some grief.

Jul 08, 2009 | 1999 GMC Sonoma

1 Answer

Need help with starting my truck!


check ignition key is key loose in cylinder? lock cylinders wear and cause irrating starting also

Jul 06, 2009 | 1996 GMC Sonoma

4 Answers

The heater still won't work after I changed the thermostat on my


Get a female garden hose adapter from the local hardware store. Disconnect the heater hose from behind the fan pulley and attach the hose connection. Disconnect the other heater hose behind the alternator, aim it towards the ground and flush water through the heater core. This worked on my truck.

Feb 12, 2009 | 1999 GMC Sonoma

1 Answer

Blows fuses


Generally speaking, a fuse 'blows' because too much current is drawn through that circuit. In this case I suspect a 'short-to-ground' or a bad voltage regulator (inside the alternator in a GMC). First, I would check the alternator's output voltage. Easiest just to look at your guage. Up to 14 1/2 volts is normal on a GM (with truck running), if it's higher - you need a new alternator. If it's under 14 1/2 volts, you
MUST find the short. Unless you have the specialized tools, (short-circuit finder, voltmeter, wiring
diagrams, etc.) this should be left to a competent automotive electrical shop. It could be as simple as a wire's insulation worn off or a short 'inside' the ECM (you truck's engine control computer). No matter what, one trip to a competent mechanic will probably be cheaper than continually replacing the computer and/or towing bills. Good luck!

Nov 24, 2008 | 1992 GMC Sonoma

1 Answer

99 sonoma with remote start


When u say it has trouble starting, does this occur when trying to start by key or remote control?

Sep 11, 2008 | 1999 GMC Sonoma

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