2003 Silverado passlock 2 issues

10

Asked by Dec 18, 2014 at 10:46 PM about the 2003 Chevrolet Silverado 1500 LS Ext Cab Short Bed 4WD

Question type: Maintenance & Repair

2003 Silverado fires when cranked and shuts off, and radio goes into locked mode.  I can take ground on battery lose and wiggle it and can hear the clicking of the computers, then tighten it back up and truck will start.  After it is turned off it will start back up, unless it sits for more than 5 minutes or so.  I have the dash tore apart and have checked wires.  Thought it might have been coming from ignition switch because when it gets real cold I had to take a hair drier to the stering colum because the truck would crank over without firing.  That problem has been corrected, but still won't start.  Got to be in the ignition/passlock housing behind steering wheel or in BCM.  Anyone else had this problem??

13 Answers

7,840

Is it setting an enhanced code?

1 out of 1 people think this is helpful.
10

No codes, no security light. I've tried a new key switch also and have done the relearn sequence several times.

1 out of 1 people think this is helpful.
7,840

I was going to offer that a 1632 means the ign cylinder has a reading problem. Those can be bypassed by rewiring with a resistor added. but if there is no code or warning light, your concern could be before the key is read in the system's "mental map". You know the guy who invented the bypass idea for all the passlock read problems says it is a very difficult system to find experienced help for. I can suggest finding the vehicle service manual at the GM dealer to read, noone else reads it. They wont miss it for a few days, you can ask them about service bulletins that apply and ignition switch issues as well. Gotta be your best help.

1 out of 1 people think this is helpful.
10

Thanks for the advice. I've bout pulled my hair out tinkering with this. Now that it is getting colder her in the mountains of NC it is getting harder to start in the mornings pulling the battery cable loose. A mechanic friend of mine told me today to try pulling the radio out but that didn't work either, and he said he would try to diagnose for me when he got a minute, but he thought it would probably be something in the BCM. I pulled it out this evening (again) and did my best best to check for wiring issues. After reinstalling, the radio didn't go into locked mode but still wouldn't start (started locking again after that BCM reinstall).

7,840

Y'kno, the enhanced code feature of a code reader is not always where it automatically takes you during its read sequence. we had to toggle thru some stuff and keep reading the directions for the olds I last checked and had a no start,security light lit, key on, wait 4 minutes, security light goes off, start engine, drive to parts store security light comes back during the trip but engine runs. No codes, then search directions for enhanced check and get a key reader concern, turns out, behind radio theres 2 wires. apply fix of adding resistor etc. Found it by googling it and reading till my eyes were dry. Resistor available as well as basic tools and supplies for electric repair. Customer never did listen, just kept waiting with the key on and then starting. they decided to sell the car. do not know after that.

10

Sounds like I have a little more reading to do. I appreciate your insight on this!

7,840

If the BCM keeps locking the radio, is it possible the Tech 1 type tool for your vehicle's vintage is the unlock? Security system issues with car computers almost guarantee you need the dealer's help by this method. it gives their customer enhanced security by making it necessary to consult them? Kinda like my mercedes, everyone wants money, but very few have a decent part and the ability to duplicate the electronic decoding or the machine to make a duplicate key or unlock a security module unless they are bigger thieves.

1 out of 1 people think this is helpful.
190

We had taken battery off of 2000 chevy Silverado and put it back on after three hours. My truck never had a problem starting until this. So my husband said turn the key all the

6 out of 6 people think this is helpful.
190

Way forward without cranking it. Wait fifteen minutes and tadah it cranked right up.

7,840

"Tadah", that means it only will start with the emergency procedure during that occurrance.. That also means the diagnostics can begin. The alternative is a bypass you can elect to do. Without it, This problem can repeat and have you unable to start it when you need to.

1 out of 1 people think this is helpful.
7,840

Changing batteries would have merely caused the computer to reset for a passlock equipped vehicle as it involves memory. The symptom suggests a code was set. it would likely be a wrong key error code, or unable to read the key code available to your tech during a reading of enhanced codes. your waiting more than 4 minutes until the security light goes off, then cycling the key and starting suggests you reset the passlock security shutdown, but the enhanced code can still be pulled with a proper scan tool. then you can find what tests are needed.

1 out of 1 people think this is helpful.
7,840

You can pull the code at your parts store using their scan tool, write it down and its definition, then wait and see if there is any recurring issue.

95

Hello, i have been fighting the security issue as well, here is an item that is suppose to bypass and it is pretty cheap if it fixes problems, I'm going to order one and see...I have no security light, but can hear a noise like an actuator moving behind the key...my doors on drives side will lock but doesn't line up due to body damage..

Your Answer

Add photo

Related Questions

  • Electrical issues with my 2003 Silverado 24 answers

    I am having issues with my 2003 Silverado. it started out with the abs and parking brake light flashing with the audible chime. this happened briefly and intermittently. it progressed from there to my...

    2003 Chevrolet Silverado 1500 LS Ext Cab Long Bed 4WD

    -

    Maintenance & Repair

  • Heater wont switch from defrost 3 answers

    2003 chevy silverado heater only blows out of defrost. I turn the knob to other settings and still only comes out of defrost. Could this be a actuator issue or the switch it self?

    2003 Chevrolet Silverado 1500 Ext Cab Short Bed 4WD

    -

    Maintenance & Repair

  • 2003 Silverado 5.3 transmission problem 5 answers

    Hi I had question I have a 03 Silverado 5.3l and I'm having transmission problem it won't shift to 3rd and high rpms that was today, yesterday it was changing to all shifts only problem was it w...

    2003 Chevrolet Silverado 1500 Ext Cab Short Bed 2WD

    -

    Maintenance & Repair

  • Engine Shutting off after about 10-20 seconds on 2004 Silverado 1500 60 answers

    Can anyone shed some light on this problem. After driving my 04' Silverado 1500 all day without any problems, after the truck sat in the driveway for a couple of hours, the truck started right up, but...

    2004 Chevrolet Silverado 1500

    -

    Maintenance & Repair

  • What years of Silverado rear end will fit a 2000 Silverado 6 lugs 3 answers

    Rear end went out on my 2000 Silverado have a an old 2002 Silverado wondering will it fit

    2002 Chevrolet Silverado 1500

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 160,205 nationwide Silverado 1500 listings starting at $1,995.

ZIP:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 1,910
#2 Rowefast
Rowefast
Reputation 1,680
#3 Silverado_owner_2006
Silverado_owner_2006
Reputation 1,590
View All

Related Models For Sale

Used GMC Sierra 1500
892 Great Deals out of 64,401 listings starting at $1,500
Used Ford F-150
2,401 Great Deals out of 210,254 listings starting at $895
Used Dodge Ram 1500
443 Great Deals out of 11,388 listings starting at $700
Used Chevrolet Silverado 2500HD
336 Great Deals out of 26,381 listings starting at $2,500
Used Toyota Tundra
523 Great Deals out of 32,139 listings starting at $2,995
Used Toyota Tacoma
544 Great Deals out of 37,483 listings starting at $2,807
Used Chevrolet Tahoe
611 Great Deals out of 27,553 listings starting at $600
Used Chevrolet Colorado
224 Great Deals out of 22,361 listings starting at $2,000
Used Chevrolet Camaro
136 Great Deals out of 35,101 listings starting at $1,995
Used Ford F-250 Super Duty
386 Great Deals out of 47,447 listings starting at $400
Used Chevrolet Silverado 2500
10 Great Deals out of 304 listings starting at $3,000
Used Chevrolet Silverado 1500HD
21 Great Deals out of 280 listings starting at $3,800
Used Ford Mustang
333 Great Deals out of 45,576 listings starting at $2,000

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
38 Great Deals out of 104,566 listings starting at $18,779
2016 Chevrolet Silverado 1500 For Sale
192 Great Deals out of 6,742 listings starting at $17,995
2015 Chevrolet Silverado 1500 For Sale
200 Great Deals out of 7,430 listings starting at $15,888
2014 Chevrolet Silverado 1500 For Sale
323 Great Deals out of 10,763 listings starting at $10,900
2013 Chevrolet Silverado 1500 For Sale
190 Great Deals out of 5,453 listings starting at $7,900