20 Most Recent 2003 Chevrolet Silverado 2500HD - Page 9 Questions & Answers

Which brand? What kind of gasoline? Some cars doesn't run with all gasoline grades also there is some gas station with poor quality of gasoline.
Happened to my car too, I always use SHELL but one day I stop in the MOBIIL gas station to put some gas, got home and the next day the car won't start had to by the STP aditive to put in the gas tank. wait about 10 minutes and car starts fine.
Another thing is my car won't run good with all gasoline grades
I always use the regular one.

2003 Chevrolet... | Answered on Feb 04, 2013

DTC P0540: Intake Air Heater - Incorrect Voltage

The Engine Control Module (ECM) uses an Intake Air Heater (IAH) to warm the incoming air for proper cylinder combustion. The ECM grounds the control coil of the IAH relay to energize the heater during cold weather operation. If the ECM detects voltage on the IAH circuit when the relay is commanded OFF, or incorrect voltage when the relay is commanded ON, this DTC will set.

There are several possible causes for this code including:

Faulty IAH Relay

Faulty IAH Relay Control Circuit

Faulty Line Voltage Reference Circuit

Faulty Heating Element

Faulty ECM

2003 Chevrolet... | Answered on Jan 11, 2013

which type car you use now? you need choose a professional diagnostic tool to dia it. http://www.chinasinoy.com/

2003 Chevrolet... | Answered on Dec 26, 2012

look under truck at transmission selector cable if it disconnected [because of rust ] or damaged --the lever may be in park but the selector at transmission is in gear wont start big problem with gm trucks burbs replaced may friends 05 silverado and had to do same for my 08 yukon

2003 Chevrolet... | Answered on Dec 10, 2012

Have you checked the computer for trouble codes yet ?

2003 Chevrolet... | Answered on Dec 08, 2012

there should be a relief valve by fuel rail take black cap off and screw regulator on if have one check it if not use a small screwdriver push in on it and see if anything squirts out

2003 Chevrolet... | Answered on Dec 07, 2012


2003 Chevrolet... | Answered on Dec 01, 2012

This might help. Unlock the door with your key, open it,shut it and lock with your key. Wait 20 seconds and unlock the door with your key. My alarm system shut down my ignition one day making it so that I couldn't start the car. My friend a radio tech told me this and it worked.----------------------------------------------------------------------------
zed-bull key programmer

2003 Chevrolet... | Answered on Nov 28, 2012

Hi James,here's a link on how to replace,you may want to remove then take to Autozone and match up,it has a bunch of different types,plus you get a lifetime warranty,never have to buy again,I use A.Z. parts.You can also look up the part from the site I am sending,join,become member,it's free,then you can use there repair guides like me.

2003 Chevrolet... | Answered on Nov 24, 2012

crank shaft sensor out !

2003 Chevrolet... | Answered on Nov 23, 2012

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