20 Most Recent 2003 Chevrolet Silverado 2500 Questions & Answers


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You can try learn procedure, see if it helps? Some of my info says to hook-up battery charger on low charge, this is a 30 minute procedure.
When you try to start and key returns to run position, if the security lamp on the dash doesn't start flashing, your security system might not be the problem?
When battery voltage is lost some of your vehicle systems/modules may or may not have problems.

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


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I tried to get everything on one page, makes it a little small to read. Check for voltage and ground at the starter motor. Any testing make sure tranny is in park or neutral and parking brake is set. Two voltage circuits, one comes from the battery, hot all the time. The other voltage circuit goes hot with key in the crank position and the starter relay energized, goes to starter S terminal. The neutral or clutch switch is also involved in that circuit. Use a test light to check for voltage. The starter motor is grounded through engine block. Make sure battery has a full charge. When you check fuses, also, use a test light and check voltage on fuse circuit, applicable fuses.

2003 Chevrolet... | Answered on Jul 04, 2017

Can go with a few different styles


2003 Chevrolet... | Answered on Dec 14, 2016

You need that switch, only for the relay coil, for the
off road lights,is that switch even rated for that?

2003 Chevrolet... | Answered on Oct 31, 2014

Manual or Push button shift??

2003 Chevrolet... | Answered on Mar 06, 2014

2005 z71 Silverado v-8 4X4 not working.
Case History 07 09 13
Problem started with service 4wDrive message. It would come and go. Got worse as time went on. Then it got to All switch lights would only come on 3 seconds when key turned on and again when started for 3 seconds. Then no 4X4 and no lights. Researched on internet and noted problem was often solver by replacing control switch due to bad solder joints. Ordered new switch. Changed out with no change. Replaced old switch.
Went to AutoZone and checked codes. Had 4 codes B2725, B0790 (both Cleared) and Codes C0327 & C0040 (Both would not clear)
Next I decided before taking to the shop to try cleaning the contacts although I thought I was probably wasting my time. Went to radio shack and bought electronic contact cleaner spray.($9.98). Pulled 30 amp fuse under hood and raised vehicle. Disconnected plug on transfer case and sprayed contacts on both plugs(male & female). Thoroughly dried with compressed air and plugged back in. Just knew this wasn't going to fix it. Also sprayed both plugs on both sides of transfer case(Rear) (2 speed sensors I think). Anyway to make a long story short started up truck and all was normal:o) Every thing work fine and all lights and all modes work correctly. Hope you have this easy of fix to cure your 4X4 problem. [email protected]

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

Ok I don't know who these people are giving advice but I hope they are not gm mechanics. There is a fuse under the hood marked MBEC 1 50amp. If it blows it knocks out both power seats seat heaters and power windows passenger side front and back. I can't believe all this wiring ****!

2003 Chevrolet... | Answered on Apr 10, 2013

YOU'RE IN LUCK!!! There's a recall for the instrument cluster on this vehicle.

Take it to the dealer and it shouldn't cost you anything for the repair.

2003 Chevrolet... | Answered on Apr 10, 2011


The gauge problems are pretty common on the 03-06 Silverados, it's caused by failing gauge motors inside the instrument cluster. Check this page for more on how to get it fixed - Silverado Instrument Cluster Repair


2003 Chevrolet... | Answered on Dec 16, 2010

you will need to change the quadrant to cure this ,(speedo head) very expensive

2003 Chevrolet... | Answered on Dec 12, 2010

sounds like you need a shift cable adjustment at the tranny

2003 Chevrolet... | Answered on Nov 29, 2010

Yup it has one

2003 Chevrolet... | Answered on Aug 31, 2010

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