Question about 2002 Chevrolet Silverado 2500HD

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I have a 2004 chevy 2500hd with a 6.0L engine truck sometimes idles down so low I think its gonna stall. Why?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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csmock132
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SOURCE: Idle Problem when you slow down of come to a stop idle goes low

Try cleaning the throttle body also check for vac leaks at the intake gaskets.

Posted on Feb 28, 2009

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SOURCE: 2001 Chevy 2500HD 6.0L, Hard starting.

Check the fuel pressure, bad fuel pump or sock on the fuel pump and fuel filter check spark plugs and check distributor cap, a fuel pump is $273.00 or a bad injector $110.99 or BWD Fuel Vapor Pressure Sensor for $35.99 any of these parts could cause the problem, so without doing a fuel pressure test it is a guess, if the vapor switch is bad it could cause a long crank time if the fuel pump is bad it has a check valve in the fuel pump, if the check valve goes bad the pump can't maintain fuel pressure so on start up the fuel has to pump from the tank all the way up to the fuel rail, if the injectors is bad it could leak after engine shut down and cause you to lose fuel rail pressure. Also the fuel vapor sensor could be stuck open and could cause the problem, all need to be tested, you can rent the fuel pressure tester from AutoZone or advance auto or Shucks they return your money when you bring the tool back as long as you buy the parts to repair it from them. That would be the first thing I would check fuel pump pressure and if you replace the pump then change the fuel sock as well. That model was not meant to burn ethanol and can kill the fuel sock the fuel pump and filter.

Posted on Jul 04, 2009

  • 1 Answer

SOURCE: Rough idle

I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

Posted on Aug 24, 2009

  • 212 Answers

SOURCE: where is knock sensor located on 2004 chevy 2500Hd

Under intake manifold on top of block,you need to remove intake to access sensors there are two of them you can't miss them when intake is off. After replacing sensors you need a new intake gasket.

Posted on Apr 04, 2010

cool78259
  • 228 Answers

SOURCE: my 2005 chvey 2500hd diesel truck will not start,

on the back of the engine close to the firewall by the glow plug controller is a high pressure oil switch. if this switch goes out diesel fuel will not reach the injector pump.try pulling the molex and jumping it out with a wire. if it starts. replace the switch. it takes an extra deep socket designed for that switch that can be purchased at any auto supply. good luck!

Posted on Jul 26, 2010

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1 Answer

Battery changed on 2004 chevy trailblazer and now it stalls out and idles really rough...any solution


Sometimes the Computer [PCM] that controls the engine will loose it's memory on how you've driven it when power is removed. It should reset itself after a few miles of driving.

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I have a 2004 Chevy Silverado. After I fill up the gas tank and start the truck the engine stalls unless I give it gas. After I drive the truck down the road it runs and starts fine.


You have sediment in your tank that gets losened and blocks your fuel line after you gas up. drain tank and clean and change both fuel filters and that should fix your problem

Nov 10, 2009 | 2004 Chevrolet Silverado 2500HD

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When idling at light car feels like it going to stall


SOUND LIKE ENGINE IS IDLING TOO LOW.HAVE IDLE SPEED CONTROL CHECKED.

Jul 28, 2009 | 2000 Chevrolet Cavalier

2 Answers

Rough idle


I had the same exact problem on my 2004 Colorado (3.5L). Cleaned the MAF sensor (with MAF sensor cleaner) and throttle body/plate - cleared it right up.

May 10, 2009 | 2006 Chevrolet Colorado

2 Answers

IDLE PROBLEM


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.

Apr 14, 2009 | Chevrolet 1500 Cars & Trucks

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Low idle


Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk 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.

Nov 30, 2008 | 2002 Buick Regal

1 Answer

My chevy 5.3 idles low sometimes stalls at stops


Clean the throttle valve and the air bypass idle speed control valve, they get full of sludge and restrict air flow, this causes a low idle at times and the engine will stall, clean them by spraying carb spray into the throttle valve while the eng is running, have someone hold the idle high or it will stall, after using at least 1/2 can shut down and disconnect the battery for 5 minutes, this clears the memory and allows the computer to relearn idle strategy, the computer willl take a few days to relearn the idle, maybe 30 miles of mixed driving.

Oct 14, 2008 | Chevrolet Avalanche Cars & Trucks

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