Question about 2003 Chevrolet Suburban 1500

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2003 suburban starting problems

2003 Suburban starting problem

My Suburban starts always on the second crank. Sometimes I move the key forward and hold it for 2 or 3 seconds and then it starts. Does anybody know how to fix this? I have already had the spark plugs changed and that didn't help and I tried some fuel cleaners.

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  • Chevrolet Master
  • 7,515 Answers

Visit the on-line store, know as reliable-store, they have the repair manuals. I'm sure you will get the solution of your problem.
Best Manuals

Posted on Dec 19, 2016

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 106 Answers

SOURCE: Changing CO2 Sensor on 2003 Chevy Suburban

check the whole exaust sestyem? there should be 4to5

Posted on Mar 19, 2009

  • 29 Answers

SOURCE: 2004 suburban spare tire will not release from under vehicle

This may sound funny but unwind the cable to the ground lie on your back and kick the spare tire until you free it.

Posted on Mar 26, 2009

emissionwiz
  • 75797 Answers

SOURCE: 2003 suburban idles to low.

the idle speed is computer controlled and not adjustable, slow idle is caused by a dirty intake, do the following.

Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on Apr 10, 2009

  • 9 Answers

SOURCE: Fuel problem on 2003 Suburban 2500; 6.0 engine

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

Posted on Apr 25, 2009

Molson02536
  • 3854 Answers

SOURCE: 2003 chevy suburban front axle noise

Worn side bearings is where the noise is coming from and might as well do both sides, I used replace them in about 2-4 hours, depending on where Murphy happened to be. Disconnect both side inner CV joint, front prop shaft and the 4X4 actuator line. If you want to drop the front pumpken. Not sure if you have enough room if you want to change the bearing without removing the pumpken from the frame. You should see when you disconnect the CV shaft.

The front diffs are toys compared to the rear, if you use auto4wd too much there are bearings in your tranfer case that are similar to the side bearings in the front diff. In both appearance and durability and soon you'll replace those too.

Good luck and keep me posted.

Posted on May 26, 2009

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Have you looked at fuel pump and fuel filter? Turn key to first position and have someone near fuel tank. They should hear the pump cycle.

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If it's been sitting for 3 years I would do as follows
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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.

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