20 Most Recent 2003 Chevrolet Silverado 2500HD Questions & Answers


there is a spot under the fuse pannel out under the hood that mice like to make nests and chew threw wires. its not a hard thing to pull the pannel. the cover comes off with a couple of snaps in between the motor and the fuse box.once you get it lifted out you then will need to unlatch the two on the pannel between the fender and the pannel. the pannel will flip up. if the truck sit alot there is were your problem probably is (you may want to check all the main and secondary fuses before you start)

2003 Chevrolet... | Answered on Sep 20, 2019


In my case, simply removing and reseating the IPC/DIC fuse restored the gauges to full functionality.

2003 Chevrolet... | Answered on Jun 07, 2019


The TCM is located on the fan shroud on the driver side of the truck. Its underneath a plastic cover but it's very easy to find. It is held on with two bolts at the top.

2003 Chevrolet... | Answered on Dec 23, 2018


P0606 P0641 P051 P0690
I NEED HELP AS TO THE DIRECT PROBLEM IVE BEEN GOOGLING past 2 weeks....not understanding exactly what I need to replace

2003 Chevrolet... | Answered on May 15, 2018


i think you will but get a second opinion

2003 Chevrolet... | Answered on Feb 07, 2018


Recommend going back to your mechanic. Especially if you were not having problems prior. If you were, then perhaps the fuel filter was not the issue.

2003 Chevrolet... | Answered on Jan 28, 2018


Hello Hyde Gillen,

What you don't know...

There are DIFFERENT types (other than vacuum )
of BRAKE BOOSTERS...
More Information for ACDELCO 1780683

YOURS is HYDRAULIC assisted... meaning... when
your HYDRAULIC pump fails... (not power steering)
EXACTLY like AIR-BRAKES... (Compressor fail)...

The BRAKES get applied...!!

>> AS designed...!! <<

You CANNOT let your HYDRAULIC systems fail...

You cannot even steer your vehicle...
(don't worry about yourself)... TRY WORRING about
the OTHERS innocents you are putting in DANGER.

I think you are on the RIGHT TRACK...
truck is fine... YOU just need to expand your
understanding of AUTOMOTIVE mechanics.

Good work... KEEP STUDYING.

Carnac the Magnificent

2003 Chevrolet... | Answered on Jan 06, 2018


Most causes are: bad connection at battery post, corrosion inside connectors where they meet the battery posts. Bad ground connection where negative cable bolts to engine and frame. Bad alternator , take it to another auto parts store or alternator repair shop and have them test it, sort of like having a second doctor's opinion. I'd say the alternator is bad if it has a lot of miles /age on it.

2003 Chevrolet... | Answered on Nov 27, 2017


No , it's not a trans module . Do you know how the starting system works ? Do you know what a wiring diagram is ? Do you have an know how to use a volt meter ? Going here http://www.bbbind.com/free_tsb.html free wiring diagrams . You need to look an see what all is involved in the starting electrical circuit before guessing as to what the problem is .
Enter your vehicle info - year , make , model and engine size. Then under system click on engine , then under subsystem click starting .Click the search button then the blue link. Looking at the wiring diagram i see IGN E fuse 10amp , the park neutral postion switch , starter relay , IGN A fuse 40 amp . I do not see a trans module , but i do see the PCM -powertrain control module . The PCM has both trans an engine control modules in one box.
The PCM will energize the starter relay if there is no anti-theft system . Do you have a security light lit on the insturment cluster ?
No crank good starter how to troubleshoot any car Hyundai

2003 Chevrolet... | Answered on Sep 24, 2017


you have a relay problem...look under the chevy forum.com or simply google the schematics for electrical relays for your year make and model..GOD bless

2003 Chevrolet... | Answered on Sep 18, 2017


I had all my analog instrument panel gauges stop working after they did the state emissions test. I found the proper fuse in the fuse block located under the hood. Simply unplugged the fuse, noticed it was still good, and plugged the same fuse (10A) back in and all the gauges started working again. Guess it needed a reset atfer they plugged in for the emissions.

2003 Chevrolet... | Answered on Sep 11, 2017


Heated seat control module is probably at fault . Have checked for DTC'S - diagnostic trouble codes .

2003 Chevrolet... | Answered on Sep 05, 2017


check plug under seat look for corrsived prongs in plug

2003 Chevrolet... | Answered on Aug 25, 2017


Sadly FIXYA has no idea what general motors company does nor charges for their parts.

2003 Chevrolet... | Answered on Aug 25, 2017


I believe it has a PassKey type of module that requires the correct key inserted in the ignition key cylinder before it will start. It is extremely difficult to disable it, but you may be able to figure out a way with the wiring diagram for the truck (check a service manual or try Alldatadiy.com).

2003 Chevrolet... | Answered on Jul 07, 2017


Sorry but with all the work you have done this is really not the kind of problem that will get solved over this keyboard, I speak from 35 years of expertise. What needs to be done is to have a GM dealer hook up a device called a flight recorder, it monitors the engine performance in real time and can record any problem s like the one you are having. You need to figure out if the fuel pressure is dropping off, or the ignition has a fault or the injector or injectors are causing this or an engine wiring harness issue or if the PCM is the real root cause and many more possibilities.. These tests are time consuming and are not cheap to have done, but it is what is needed if you are to get this fixed. OR you can sell or trade the truck.

2003 Chevrolet... | Answered on Jul 07, 2017


View scan data would show what's wrong , do you know what scan data is .If not ,suggest you take it to a qualified repair shop.
047 Engine Hard to Start or No Start Scan Data for Ignition
048 Engine Hard to Start or No Start Scan Data for Starting Problems

2003 Chevrolet... | Answered on Jun 30, 2017

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