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neutral safety switch replacement


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chevy02tb
User

Feb 7, 2015, 8:47 PM

Post #1 of 21 (1168 views)
neutral safety switch replacement Sign In

Anyone ever replace the NSS in a 2002 chevy trailblazer?
Looks like the drive shaft will have to be moved to get at it.


Hammer Time
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Feb 8, 2015, 6:40 AM

Post #2 of 21 (1149 views)
Re: neutral safety switch replacement Sign In

There should be no reason to remove a driveshaft.





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Discretesignals
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Feb 8, 2015, 6:51 AM

Post #3 of 21 (1146 views)
Re: neutral safety switch replacement Sign In

Have fun getting the electrical connectors off it if they are stuck on...<snickers> Also, don't be surprised if the grommet inside the shifter cable comes apart, which means you need to install another cable.





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(This post was edited by Discretesignals on Feb 8, 2015, 6:59 AM)


chevy02tb
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Feb 8, 2015, 7:37 AM

Post #4 of 21 (1138 views)
Re: neutral safety switch replacement Sign In


Quote
Have fun getting the electrical connectors off it if they are stuck on...<snickers> Also, don't be surprised if the grommet inside the shifter cable comes apart, which means you need to install another cable.


Transmission was just replaced so they should come off easily, but there is no room to get a hand in there to remove them. Will try a channel lock pliers. Not the best weather here so hard to work on outside.


(This post was edited by Discretesignals on Feb 8, 2015, 8:23 AM)


Discretesignals
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Feb 8, 2015, 8:20 AM

Post #5 of 21 (1131 views)
Re: neutral safety switch replacement Sign In


Quote
Transmission was just replaced so they should come off easily


That is if they unplugged the switch when they did the R&R. I usually just unbolt the switch from the transmission, leave it connected and swing it off to the side when doing a trans R&R because I know you usually end up breaking the switch and having to rewire pigtails if you try unplugging them.

If it is easier for you to get the switch off by unbolting the front drive shaft from the front end and pushing it to the side, then do it.

Couple of other tricks:
Don't try prying the shift cable from the manual lever. Unbolt the lever from the shift shaft and leave it connected to the cable.

When you get the lever off and cable out of the way, grind the burrs off the edges of the shift shaft. The lever makes burrs on the edges. That way you don't break the switch trying to slide it off the shaft.





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(This post was edited by Discretesignals on Feb 8, 2015, 8:56 AM)


chevy02tb
User

Feb 9, 2015, 4:27 PM

Post #6 of 21 (1100 views)
Re: neutral safety switch replacement Sign In

can not get the nss on the drive shaft it in the way need about a 1/4 of inch more room. I unbolt the 4 bolts on the dirve shaft in front by u joints but nothing moved.


chevy02tb
User

Feb 9, 2015, 4:35 PM

Post #7 of 21 (1097 views)
Re: neutral safety switch replacement Sign In

took a heat gun and warmed up the connector the four pin connector can off easy the 7 pin took some time.
Couldn't get the nss off the shaft it broke and then I couldn't get the piece off the shaft. then the other one with not go on. Have to move the drive shaft. gave up for the day it's getting cold.


Discretesignals
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Feb 9, 2015, 4:39 PM

Post #8 of 21 (1093 views)
Re: neutral safety switch replacement Sign In

I don't know how you people do it in the North. They'd find me stuck under the truck with my tongue frozen to the drive shaft..haha





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chevy02tb
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Feb 9, 2015, 4:48 PM

Post #9 of 21 (1090 views)
Re: neutral safety switch replacement Sign In

any tricks to get the drive shaft loose by the u joints.


Discretesignals
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Feb 9, 2015, 4:50 PM

Post #10 of 21 (1087 views)
Re: neutral safety switch replacement Sign In

Unbolt the front drive shaft from the front end. Then just swing it out of your way. Don't try pulling it from the transfer case.





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chevy02tb
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Feb 16, 2015, 4:34 PM

Post #11 of 21 (1034 views)
Re: neutral safety switch replacement Sign In

Have any pictures of the trans in neutral. Didn't read the instruction had it in park. It said to put it in neutral, so i'm not sure it's in neutral. But the part did just slide on and lines up with the bolt holes after moving the shaft to where the flat sides are facing front and back ( l l like this) So can't move the shift lever it's lock in park with the NSS removed. Must have to have power to get it out of park. Have new part on but not the 2 plugs. Dam it's cold here maybe get it done this weekend when it get's in the 20's


Hammer Time
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Feb 16, 2015, 4:36 PM

Post #12 of 21 (1033 views)
Re: neutral safety switch replacement Sign In

Just count the detents to neutral.



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nickwarner
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Feb 18, 2015, 2:58 AM

Post #13 of 21 (1006 views)
Re: neutral safety switch replacement Sign In

If you can weigh down tarps to the ground around the truck and get an electric space heater under the truck, it will get a lot nicer to work under it within 20 or 30 minutes. Shovel snow up against the tarps to act as insulation.

I'm so glad I built a new garage last year.


Hammer Time
Ultimate Carjunky / Moderator
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Feb 18, 2015, 3:09 AM

Post #14 of 21 (1004 views)
Re: neutral safety switch replacement Sign In


Quote
I'm so glad I built a new garage last year.


And I'm so glad I live in South Florida......................



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



chevy02tb
User

Feb 22, 2015, 10:40 AM

Post #15 of 21 (980 views)
Re: neutral safety switch replacement Sign In

still at it, the plugs will not go all the way in. Any suggestion? Maybe heat it up will that work?


Discretesignals
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Feb 22, 2015, 11:12 AM

Post #16 of 21 (979 views)
Re: neutral safety switch replacement Sign In

Not sure what you mean. Do the connectors fit at all or just won't push in enough to latch? Are the connector terminals or seals plugged up with that glue gunk? If the connectors are all gunked up, you'll have to clean that stuff off.





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chevy02tb
User

Feb 22, 2015, 1:08 PM

Post #17 of 21 (975 views)
Re: neutral safety switch replacement Sign In

will not seat all the way in to put key lock in, can see some of the rubber gasket. and on the backup plug can't get it lock on the numb on the NSS. The dealer could not get these on either the old on it was the same way not all the way in and water got inside and the connectors where green. There seem to be nothing in the connectors I can put a piece of metal the same size as the connector prongs and it will slide in just as far. So maybe the part has to much glue in it that it will not seat. That why I ask if maybe I should heat it to make it seat on.


Discretesignals
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Feb 22, 2015, 1:15 PM

Post #18 of 21 (973 views)
Re: neutral safety switch replacement Sign In

There shouldn't be any glue inside the connector cavity of the NSS. The problem they had was the gunk that they used inside the switch would get hot and melt. Then it would leak into the connector cavity making it near impossible to get the connectors off.

Is this a dealer NSS, aftermarket NSS, or used one?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 22, 2015, 1:20 PM)


chevy02tb
User

Feb 22, 2015, 1:23 PM

Post #19 of 21 (969 views)
Re: neutral safety switch replacement Sign In

aftermarket


Discretesignals
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Feb 22, 2015, 1:33 PM

Post #20 of 21 (965 views)
Re: neutral safety switch replacement Sign In

One thing about aftermarket parts is that they don't always fit sometimes. They could of used too much potting material to seal the pins in the connector cavity which is causing your connector(s) to not seat properly.

Now AC Delco are parts that dealers play with. Any many part houses sell AC Delco stuff. You may be able to find a Delco switch that should fit just as the factory original. That way you don't have to burn up stuff with your heat gun and cause damage. Plus you don't have to go through all this other crap trying to get something to fit together because of improperly engineered aftermarket stuff.

AC Delco number is D2263C.



You can see that the material used in the connector it vastly different than what they use in the other aftermarket switches.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 22, 2015, 1:35 PM)


Hammer Time
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Feb 22, 2015, 1:37 PM

Post #21 of 21 (961 views)
Re: neutral safety switch replacement Sign In

I would take a hard look inside the plug and make sure none of the pins are bent over.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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