Won't shift out of park unless.....

[Meza]

If I turn the key to the first slot, before my power comes on, I can shift into neutral and start my truck then shift into any gear besides park.

 

I am assuming this had to do with my brakes sense I recently bled my brakes and changed master cylinder.

However I'm almost certain it is a possiabllity that it still could be something electrical.

[Meza]

By the way this is a 1998 chevy c1500 v6 4.3l.

[1997SierraSLT]

Sounds like the exact problem I had when I changed out my power brake unit. It was the brake pedal pin being a sloppy fit going through the brake light switch (stoplamp switch). This prevented the electrical contacts within the switch to properly open/close. If I recall correctly, I added a simple nylon washer on the pin behind the retainer clip to solve the problem.

 

The brake light switch is part of the neutral safety switch electrical circuit. You must depress the brake pedal to shift out of park while the engine in running.

 

http://www.2carpros.com/questions/gmc-c1500-1997-gmc-c1500-access-to-brake-light-switch-on-brake-pedal

[Meza]

Okay if this is the case what is the proper way to fix it? My brake lights still activate I guess I was just hoping someone would said I got air in the line some weird way when I bled my brakes.

 

ok heres a little more info to.... before all this happened i could press my brake pedal almost all the way to the floor before slowing down so i checked the fluid it was a little below the minimum fill line so I added fluid and then bam! I can't shift out of park. So I figure sense the fluid got low air got in the lines.... So I changed the cylinder n bled brakes.

 

With this in mind are you still sure it's this brake switch? Should I replace my stop light switch or are you talking about the pushrods that makes the bad connection that u fixed?

[Meza]

Also I think my helped put the emergency brake on before we bled the brakes.... Is it

A possibility this trapped the air in the line and isn't letting me

Press my brake pedal far enough to shift

[1997SierraSLT]

Did you properly bench bleed the master cylinder before installing it?

 

This is the first I've ever heard of someone engaging the rear emergency brakes to properly bleed the system.

[Meza]

Yes I sure did. And it was an accident we never removed.... I had it on to pull front tires off and check my rotors and my pads witch looked brand new so I didn't replace them. But anyways if its not the brake light switch what else are the Possanilitys? Someone told me a steering colum pin or a transmission pin? That totaly threw me off I had no clue what they where talking about. Also is it possiable that its transmission related?

[Meza]

Please help

[gmtech4]

Yes I sure did. And it was an accident we never removed.... I had it on to pull front tires off and check my rotors and my pads witch looked brand new so I didn't replace them. But anyways if its not the brake light switch what else are the Possanilitys? Someone told me a steering colum pin or a transmission pin? That totaly threw me off I had no clue what they where talking about. Also is it possiable that its transmission related?

you sir are now barking up the wrong tree and have to stop this panic diagnoses ,,,,,see a technician ,,,this is beyond your abilities ,,,,sorry

[Meza]

You sir shouldn't be so rude I fixed it perfectly fine thanks to no help from

Anyone..........

[Meza]

I test all my wires to the switch all normal so I tested the switch itself and I got .2 ohms I'm pretty sure this is supposed to zero out..., either way when I took the switch off the truck shifts perfectly fine without it so I'm just gonna replace this tomorrow and go from there

[lee123]

First, are your brake lights working?

[1997SierraSLT]

Are you saying that your brake light switch was not the problem since you didn't get help from anyone.........?

 

if so, I'll be sure to disregard any future posts you make to this forum asking for help to diagnose any issues you have with your vehicle.