Question about 2003 Chevrolet Suburban 1500

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What is the fuel pressure supposed to be on this 2003 K1500 suburban with a 5.7 engine

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55-62 PSI

Posted on Mar 06, 2009

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Posted on Jan 02, 2017

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My 1999 Chevy Suburban K1500 cranks; but will not start.


You have to determine whether there is no fuel supply or no spark supply. Disconnect one plug wire and ground it to the engine and crank the vehicle. There should be a visible spark and snapping heard. If spark ok check fuel pressure on the fuel rail with a guage. Should be 55-60lbs.

Apr 11, 2015 | Cars & Trucks

1 Answer

Fuel delivery problem on a 2003 suburban


That is the fuel composition sensor ! Does your Suburban have duel fuel tanks or single tank ? What engine is in yours ? The fuel pressure regulator in located on the fuel injector rail on top of the engine . I would say the fuel pump was bad , just from personal expeirence . But if you don't know how to test the electrical circuit an check for fuel pressure with the correct tools , i suggest you take it to your chevy dealer . Is it a flex fuel vehicle ?
GM Fuel Pump Relay Testing

Mar 22, 2017 | 2003 Chevrolet Suburban

1 Answer

1999 Suburban passlock security


Not sure I am following you.
The security system is supposed to keep the engine from cranking if the correct key is not used.
The check gauge and charging light would be on until the engine starts.
You have checked fuel pressure with a gauge and you know the line is not pressurized when you crank the engine ?

Jan 13, 2013 | 1999 GMC Suburban

1 Answer

My 2003 Suburban takes two cranks to start the engine. However, if its colder and I turn the key to the first position and hold it for 5 seconds it will usually start on the first crank? Do you know...


This is more than likely related to the electric fuel pump or something downstream in the fuel system. turning the key on and wating a few seconds before starting allows the pump to pressurize the system. Might also be a bad fuel filter, but the key here is keying up and waiting and then a immediate start, that is what leads me to this solution.

Hope this helps.

I always key up and wait a second or two on all my vehicles, to pressurize the system, then turn the engine over. I have learned this is good practice with any vehicle I have owned..

Hope this helps.

Oct 04, 2010 | 2003 Chevrolet Suburban 1500

1 Answer

I have a 1999 Chevrolet Suburban 1500, 350 V8, automatic. The engine cranks, starts and then immediately dies. Fuel pressure is low (about 50 psi) and decreases slowly after engine stops. Have already...


check the fuel system
pump, regulator, fuel pressure damper , return valve
when the key is on the system needs to be pressurized and maintain pressure, if you dont have this , recheck your fuel system
if everything is ok, than cranck the engine and look for injector fault

Nov 07, 2017 | 1999 Chevrolet K1500

1 Answer

I have a 1999 gmc suburban that runs doggy, sometimes after it sits for 4-5 hrs it takes 10 cranks to start, after its started it keeps starting. it also runs doggy, replaced the fuel pump and the fuel...


You could have a faulty fuel pressure regulator of a bad CSFI. Here is a link you may interest you to getting your Suburban running 100% again soon.

http://members.shaw.ca/betterthanyoutoo/Sticking%20Poppet.htm

Thank you for using fixya.

Apr 14, 2010 | 2002 GMC Sierra C/K1500

1 Answer

Engine stalls at idle after engine has warmed up.


not near enough fuel pump pressure,should be 45 lbs

Jan 31, 2010 | 1994 GMC Suburban

1 Answer

97 suburban wont start when engine is cold.


you might want to check your return line to the tank

Jan 13, 2010 | 1998 Chevrolet K1500

1 Answer

Fuel problem on 2003 Suburban 2500; 6.0 engine


There is a fuel test port on fuel rail...on left side of the engine.

Apr 25, 2009 | Chevrolet Suburban 2500 Cars & Trucks

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