Question about 1993 GMC Sierra K1500

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1994 gmc sl want start up changed fuel pump in sending unit cant here it come on

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Check your fuel pump relay

Posted on Oct 01, 2010

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1998 GMC K1500 Sierra SL 4wd Truck will crank but not start I cant get any fuel


The first thing i would check is the fuel pressure. the fuel pump may be running, but that doesn't mean that it is putting out the right amount of fuel

Jul 30, 2013 | Cars & Trucks

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1994 gmc safari, wont start. seems to be trying to. changed fuel pump and filter, didnt help. now what


The same thing happened to me in 2008. I had to put in a new starter also. It's been fine ever since

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I have a 1994 GMC Sonoma 4.3L Votec we have installed new fuel pump ran for a couple of weeks. Now it wont start we have spark but still not starting?


If the filter is not seated on the new fuel pump properly or has fallen off after installation it will ruin the pump immediately. I have seen many people do this. It is a very common problem when changing the fuel pump.

Oct 28, 2010 | 1994 GMC Sonoma

1 Answer

Engine wont start in 92 gmc sierra 454 block


well spraying a little starting fluid into the air intake and trying to start it will tell you if it is fuel related or and elctrical problem, i guess that would be the first step, and narrow things down a bit, if it starts with the fluid it is a fuel issue, if not its elctrical.
check you spark plugs, if your fuel pressure regulator was bad and it was flooding the engine, it would have fouled your plugs, i guess id start with those two things and at least start narrowing things down.

Good Luck, come on back if you get stuck....

Mar 21, 2010 | 1994 GMC Sierra

3 Answers

99 yukon 180,000 mi. doesn't start. cranks forever, but won't start. Should I be able to hear the fuel pump when I turn on the key?


yes you should be able to hear the fuel pump run for about 5 seconds once the key is turned to the on pos. check to make sure you have spark. if you do try having someone spray air intake or carb cleaner into intake manifold while you crank. If the truck starts right up for a second (or stays running as you keep spraying) Id say you have a bad fuel pump and id change the sending unit also. (First check the fuel pump fuse and fuel pump relay) GMC and Chevy are nororiously known for having bad fuel pump/sending unit problems. I have prob changed over 60 myself.

Nov 30, 2009 | 1999 GMC Yukon

2 Answers

1996 GMC Jimmy Need help trouble shooting. Turns over but won't


Fuel pump or injector assembly. Need to know what the fuel pressure is before throwing a part at it. By what you are saying I'm leaning tword the fuel pump. Make sure the wires at the top of the sending unit are not burn. There is a small 4 wire connector on the inside of the sending unit. If it's burnt you will need to replace both the pump and sending unit.

Oct 11, 2009 | 1996 GMC Jimmy

1 Answer

Fuel pump- 2002 GMC Sierra


The fuel sending unit only controls the gas guage not the fuel supply to the vehicle. The pump is twelve volts. If you are not getting twelve volts on the PUMP wires check the fuel pump relay and the key circuit to it. If you have to cycle the key three to four times rapidly to get the vehicle to start check the fuel pump pressure at the regulator for manufacturer specs. An injector stuck open will also cause same problems you are describing.

Jul 30, 2009 | 2002 GMC Sierra

1 Answer

Turns over but won't start


I'll tell ya what a diesel mechanic told me..."fuel injector pump". It seems that the new low sulfur diesel being sold now wears the seals out on the older pumps. I changed the fuel sending unit and that seemed to help a little, but now while driving it will shut down, and it's hard to start. Going to have the job done now. Part is very expensive! Hope this helps.

Apr 11, 2009 | 1994 GMC Suburban

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