how to reset passlock

Asked by Nov 05, 2016 at 09:01 PM about the 2006 GMC Sierra 1500 SLE1 Extended Cab 4WD 6.5 ft. SB

Question type: Maintenance & Repair

unhooked battery,changed starter,hooked battery back up. Engine will turn
over but not start.

7 Answers


Lock all the doors manually except the drivers door, close and lock it with the key, wait at least 30 seconds then unlock the drivers door with the key, that should disarm the system, but there is another problem that may also happen to you, once the power supply is removed from the BCM it may loose memory of all your accessories, so nothing works even if you are able to start the engine, if that has happened the only cure is to have the dealer reflash the system to match the vehicles Vin. There is a little tool called a preset or code saver that needs to be installed before the battery is disconnected. HTH


That is not the answer I got for resetting passlock on a 2003, it is turn key to just on one click, wait 10 minutes, than back off position for 5-10 seconds, than repeat for 3 times. That is one answer I got that didn't work for me, another is turn key wait until security light goes solid or off which mine is not on, than do the procedure above, go to off first after....than try and start... I'm at a loss other than to try to order this item and trick the entire system into thinking it's working ?? at dealer for big dollars,, I have one of my security guys coming over in the next few days as when we add after market we cut some of those wire and we have no problems with pass lock....???

1 people found this helpful.

that box is about 35 bucks on line for the gm plug in at key and the system think it is working if it is in the key ignition ....I have a plain key.. 2003 GMC 1500 SLE ext cab, which will not restart after a collision, but no lock on security light or even the light on constant. but does have a lock on one click of key.... I'm trying to figure out...


An 03 doesn't have the same system as an 06. As the Walmart found out in my area. They pulled the battery out to replace it without the saver tool and had to pay towing and the dealers charges to get the truck reflashed.


my 2003 doesn't run, even doing the right sequence for resetting the passlock.. Quick question, if my light is not on, but when the key is in one click the yellow car and lock is over the top locked, but goes off next click, it doesn't blink at all nor does it stay on constant. So I think I'm back to as I can't hear the fuel pump come on, no click...


GM really keep all this passlock stuff a secret for some insane reason, my Haynes book shows all 99-06 basically the same, but they do not cover passlock, which someone would come up with a book, and app so we could do this our selves... never had a bit of trouble with my 99 GMC wish I had keep it, seller remorse but it would of been hit rather than my 2003 which I have read has passlock resister in ignition but than another place referred to that as passlock II ,,, lots of confusing info out there.. thank you for all the help.. still trying to start or another tow to the body shops which will take it on tow to shop to fix that, all this is really stupid.. I don't get these places... body shop will not take a truck that will not start... strange... so it has to go get the other fixed first ... they also sub out the alignment,,, I hate my truck going to all these unknown people... I can't believe one shop can't do it all, must have something to do with having Farmers Insurance..


OH NO Farmers.

Your Answer:

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 60,078 nationwide Sierra 1500 listings starting at $1,495.


GMC Sierra 1500 Experts

  • #1
  • #2
    John Saffrahn
  • #3
    Glenn Clingenpeel
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,787 Great Deals out of 155,768 listings starting at $1,495
Used Ford F-150
2,319 Great Deals out of 198,937 listings starting at $1,300
Used GMC Sierra 2500HD
142 Great Deals out of 17,892 listings starting at $3,200
Used Toyota Tundra
452 Great Deals out of 37,795 listings starting at $1,750
Used Chevrolet Silverado 2500HD
362 Great Deals out of 29,388 listings starting at $2,718
Used Dodge Ram 1500
346 Great Deals out of 9,243 listings starting at $1,800
Used Toyota Tacoma
429 Great Deals out of 49,110 listings starting at $2,400
Used GMC Yukon
335 Great Deals out of 22,092 listings starting at $2,950
Used Chevrolet Tahoe
655 Great Deals out of 38,141 listings starting at $1,199
Used Ford F-250 Super Duty
455 Great Deals out of 37,636 listings starting at $1,999
Used Chevrolet Colorado
275 Great Deals out of 38,829 listings starting at $2,495
Used GMC Canyon
110 Great Deals out of 15,254 listings starting at $2,750
Used Ford Mustang
297 Great Deals out of 39,759 listings starting at $1,312

Used Cars For Sale

2018 GMC Sierra 1500 For Sale
55 Great Deals out of 34,392 listings starting at $20,490
2017 GMC Sierra 1500 For Sale
124 Great Deals out of 5,461 listings starting at $18,488
2016 GMC Sierra 1500 For Sale
58 Great Deals out of 2,748 listings starting at $16,700
2015 GMC Sierra 1500 For Sale
84 Great Deals out of 4,649 listings starting at $11,995
2014 GMC Sierra 1500 For Sale
62 Great Deals out of 2,775 listings starting at $9,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.