Author Topic: 2014 Tahoe (new to me) fluid change,,,,,,,,,,, (Read 32318 times)

Sammconn · « **Reply #50 on:** March 28, 2023, 08:16:16 PM »

There’s a switch associated with the ignition switch.
Not sure if it’s at all related, but there is a “master” type switch.

Just a thought without thinking too hard.

JR · « **Reply #51 on:** March 28, 2023, 08:55:50 PM »

That is the switch I just replaced, took me a little to get it clocked right. Alarm went off once so I triggered something when I disconnected the battery a couple times.

There is an anti-theft ring around the ignition and I may have triggered that. Trying to find more info. Looking at high end scanners too, not even sure if my keys are fobs or not. I can check that in the AM at ACE, they do them.

Scanner I am looking into will do it all. Not real cheap but they will do keys and reset about anything. Got 4 vehicles I can use it on right now.

wilsonphil · « **Reply #52 on:** March 28, 2023, 09:59:34 PM »

Quote from: JR on March 28, 2023, 02:30:47 PM

Guys I need some help here. I have a no crank/run issue. Was a little hard to start (keep running), then stopped in the drive through a few blocks from home. Got it towed home.

Battery is good, new ignition switch, will crank when jumped in the fuse box. Key turns everything on, but no crank, no antitheft light (watched lots of videos) but I am still thinking this might be it. Checked voltages everywhere, all are around 12.6v. Ignition relay clicks, nothing on the "crank" relay. Switched relays, same, all fuses good.

Any ideas??

Well buy a nice new Ram 2500

Just jopking, it really sounds like security issue but I'm sure you have checked that you have fuel?

Sammconn · « **Reply #53 on:** March 28, 2023, 10:05:32 PM »

Quote from: JR on March 28, 2023, 08:55:50 PM

That is the switch I just replaced, took me a little to get it clocked right. Alarm went off once so I triggered something when I disconnected the battery a couple times.

There is an anti-theft ring around the ignition and I may have triggered that. Trying to find more info. Looking at high end scanners too, not even sure if my keys are fobs or not. I can check that in the AM at ACE, they do them.

Scanner I am looking into will do it all. Not real cheap but they will do keys and reset about anything. Got 4 vehicles I can use it on right now.

Ok. Somewhere in the age of this they keys contained a chip.
You may be on to something with the security.

That’s where my help ends however.
Or non help as it may be.

May need to go to stealer but not sure what the high end scanners can do.

JR · « **Reply #54 on:** March 29, 2023, 08:35:21 PM »

Ive pulled every fuse, switched relays, etc, just no crank. Turns over fine when jumped.

Beginning to think its the ECM now. It was a little hard to start when this happened, then stalled, then quit again in the drive through.

KensAuto · « **Reply #55 on:** March 31, 2023, 09:49:51 AM »

Is there a crappy aftermarket alarm under the dash?

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JR · « **Reply #56 on:** March 31, 2023, 11:22:10 AM »

No alarm, have seen where they mess up everything.

I have a new ECM on order. I hate doing parts just to see if they fix something. With it shutting down twice while running I am leaning towards it.

I can jump from the CRANK fuse and it turns over, I hear the RUN relay click with the key, just no crank with key.

JR · « **Reply #57 on:** April 05, 2023, 12:45:09 PM »

Still waiting for the ECM, been a week now. Should have all the updates too, lifetime warranty. Warranty looks flaky, more to protect them really.

Anyway, yes I have run a scanner (should have earlier) and both the scanner and tuner say they can't communicate with ECM/TCM.

Flyin6 · « **Reply #58 on:** April 05, 2023, 04:06:13 PM »

Fingers crossed emoji...

JR · « **Reply #59 on:** April 05, 2023, 04:26:00 PM »

Most point to that now. I should have run a diagnostic right off,,,,,,,,,,

JR · « **Reply #60 on:** April 10, 2023, 10:24:57 PM »

I am stumped guys. Tying to avoid taking in but I may have to. New ECM does the same thing. If I had a good wiring diagram I could trace a few things but getting frustrated.

Everything lights up on dash, then goes out as normal. Not even a check engine light? Possibly the neutral switch or BCM? BCM usually has things working wonky, like no PRNDM light or indicator hash. Courtesy lights all work fine, doors, windows. All fuses are fine and it cranks when jumped across relay so maybe the neutral switch?

Flyin6 · « **Reply #61 on:** April 10, 2023, 10:29:18 PM »

Ouch

I think it's dealership time

Give them the anxiety attack, save yourself.

Fixed with a guarantee...

KensAuto · « **Reply #62 on:** April 14, 2023, 01:07:44 PM »

Missing the check engine light is a red flag, along with no comms.

Can you communicate with other modules?.. like the TCM?

I'd put a wiring issue at a 95% chance.
Under hood fuse block at 4%

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JR · « **Reply #63 on:** April 15, 2023, 01:47:54 AM »

I checked the nuetral switch, well tried, there is not one. Maybe internal like the allisons?

Grounded the battery leads, nothing. Checked the ABS plug, looks good, cleaned and dielectric it. 4 big power leads all checked off the battery. Cleaned one ground on the block, there are many more but I don't think its a ground issue. Doesn't do funny things, just doesn't start/crank. Still cranks fine jumping the relay, but not starting. Funny that all the lights work, horns, radio, windows, seats.

Pulled the main panel loose last night just to check out the underside. What I have found with my inner fender cut is the main plugs form the ECM are hanging in the open. They are next and I have new inner fenders to attach them to and protect like factory. Pic shows the plugs hanging loose, that is the left strut under it.

Thought I had posted this but nope.

KensAuto · « **Reply #64 on:** April 15, 2023, 12:45:32 PM »

Didn't you say that you don't have comms with the pcm?

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JR · « **Reply #65 on:** April 15, 2023, 01:21:46 PM »

Yep, looks like I have power/ground at the OBD2 port, but no comms. Tried 2 scanners and tuner.

JR · « **Reply #66 on:** April 17, 2023, 07:39:29 PM »

No luck, one last thing is maybe the nuetral/shifter interlock? I think that is in the switch I just replaced though?

For the record I cleaned, washed, and pasted every connection in the fuse block and that area. Grounds are good, battery all charged up. It was pretty dirty in there and a couple lower plugs too. All the plugs came out with the fuse box. They are supposed to snap in so after cleaning I used a drop of hot glue to hold them into their tabs.

Same thing and still no com with anything?

JR · « **Reply #67 on:** April 17, 2023, 07:44:40 PM »

Ken, tried to call to see if you had any ideas. Mailbox full,,,,,,,,

stlaser · « **Reply #68 on:** April 17, 2023, 11:56:30 PM »

Quote from: JR on April 17, 2023, 07:44:40 PM

Ken, tried to call to see if you had any ideas. Mailbox full,,,,,,,,

Secretary H must be too busy to answer the phone…..

JR · « **Reply #69 on:** April 18, 2023, 12:03:05 AM »

He got back, I forgot we are in the same time zone so it was business hours still. Couple ideas thrown out but not looking good.

EL TATE · « **Reply #70 on:** April 19, 2023, 10:01:26 AM »

I forget JR, after you replaced the ignition switch, did you have it flashed to communicate to the key fob? dealer had to do mine in the Yukon.

JR · « **Reply #71 on:** April 19, 2023, 03:42:50 PM »

Thanks Tate, but not the issue.

The switch is not the anti-theft module that wraps around the tumbler. Plus I would be getting a "anti-theft" warning on the dash, it goes out.

Flyin6 · « **Reply #72 on:** April 19, 2023, 06:30:00 PM »

JR, is there a fusible link soldered into the wiring harness somewhere?

JR · « **Reply #73 on:** April 19, 2023, 06:37:35 PM »

Non that I see. There are 4 main pos wires coming off the battery though. 1 goes right to the big spade in the fuse panel, 1 into the cab, 1 to the starter. All of these have big fuses, all are good.

JR · « **Reply #74 on:** April 19, 2023, 06:38:55 PM »

Can't get it to anyplace until next week. 2 shops down the street Im looking at now.

Flyin6 · « **Reply #75 on:** April 20, 2023, 12:00:48 AM »

OK, just thinking of dumb stuff now, but have you pulled and cleaned ALL, that's ALL of the ground wire connections, everywhere?

That being said you might start checking the continuity of the wires themselves. About two years ago I had a wire pull apart beneath my seat on a John Deere tractor that killed it. It took wire chasing to find that one... One in a million, but with a good mechanic and some time you can track that down as well.

Dumb stuff, you have pulled and checked all associated fuses too, I'm guessing?

JR · « **Reply #76 on:** April 20, 2023, 01:48:06 AM »

All fuses, relays and several grounds, not all. Few more I can hit tomorrow since it will be here for a few days still.

Plus GM used these jumper boxes all over. Basically they place all the modules near what they do and have a "junction box" to splice the wires all over.

Sammconn · « **Reply #77 on:** April 20, 2023, 08:13:15 AM »

Quote from: Flyin6 on April 20, 2023, 12:00:48 AM

OK, just thinking of dumb stuff now, but have you pulled and cleaned ALL, that's ALL of the ground wire connections, everywhere?

That being said you might start checking the continuity of the wires themselves. About two years ago I had a wire pull apart beneath my seat on a John Deere tractor that killed it. It took wire chasing to find that one... One in a million, but with a good mechanic and some time you can track that down as well.

Dumb stuff, you have pulled and checked all associated fuses too, I'm guessing?

I’m kind of with the boss man here.
I think now you’ve got a broken wire or bad connection.
Was running (all good) then sputtered (connection failing) now DIW.
I’m thinking you’ve got some wire checking.
Should be able to find schematics somewhere online. May cost but not like a shop could.

TexasRedNeck · « **Reply #78 on:** April 20, 2023, 06:23:20 PM »

Alldatadiy.com

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JR · « **Reply #79 on:** April 25, 2023, 03:28:58 AM »

Thx TRN, good reference to find those loose wires.

Not getting anyplace really, took it to a local shop. Owner seemed cool, got many good reviews. Just a couple blocks from the house too.

JR · « **Reply #80 on:** May 01, 2023, 03:27:18 PM »

Well, first shop said they can't find what the issue is. I have not seen it move so I figure they just threw a scanner on it and its still non com.

Going to another shop that has a good rep for electronic issues, just happens to be other side of town.

Flyin6 · « **Reply #81 on:** May 01, 2023, 08:20:15 PM »

Dang, this thing is a real puzzle!

Hope you get it sorted, JR

JR · « **Reply #82 on:** May 01, 2023, 09:11:44 PM »

New shop is familiar with PPV Tahoe's and such. Quoted me 2 hours to diagnose and will get on it later this week hopefully.

JR · « **Reply #83 on:** May 02, 2023, 07:29:40 PM »

Already heard from the shop. They found some chafed/possibly broken wires just down from where I did the work on the fuse block. It does have coms now with those repaired, but they want to put a new fuse panel in. I said go ahead. 1k so far,,,,,,,,,

Some of the harness covers were rotting away, I plan on replacing those and doing the inner fenders to keep the crud out.

Dustoff35 · « **Reply #84 on:** May 03, 2023, 08:00:32 AM »

Sounds like you are approaching a solution.

JR · « **Reply #85 on:** May 06, 2023, 05:32:00 PM »

Got it back friday afternoon. Just under 1k, but that included a new fuse block ($500 from GM)

Runs as it did, no issues. Kinda mad at myself for missing this, just 3-4 inches from where I was looking. It was on the inner fender just below the fuse box.

All the wires WILL be addressed with cloth wrap, then new split covering. I have new inner fenders too, maybe cut down the crud!

Dustoff35 · « **Reply #86 on:** May 07, 2023, 08:27:40 AM »

It’s back up and running. I’d count that as a win.

JR · « **Reply #87 on:** May 07, 2023, 09:22:00 PM »

Oh its a win that cost 1k. I should have found it.

Bob Smith · « **Reply #88 on:** May 08, 2023, 12:18:20 AM »

Problem was you didn’t find it , and it was only a grand. It could have been at least twice that.

JR · « **Reply #89 on:** May 14, 2023, 05:38:09 PM »

Spent a few hours cleaning the back out. Fine dirt up to a 1/2 thick was under stuff, flipping nasty. All the spare tire stuff and a 4 way was just thrown in the cubby.

There were also 2 power lines and a ground all around 3ft just bouncing around in there too.

Won't get into the little stuff but way better. Then the drivers seat recline lever broke off on the way home from the Ridge.

JR · « **Reply #90 on:** March 11, 2024, 09:37:59 PM »

Added amber "excuse me" warning lights in the back. I get tired of tailgaters and high beam lights. Work great the couple times I have used em. I have no issue moving over, but not if I get screwed and your impatiant. High beams are a tick for me, people are stupid.

Few more changes coming soon, been neglecting it some.

These are a start; https://www.prioritytire.com/prinx-hicountry-r-t-hr1-lt-285-70r17-121-118q-e-10-ply-rt-rugged-terrain-tire

10lbs lighter, just a little shorter and 1 inch narrower. I have some slight rubbing issues and it rides like a tank.

JR · « **Reply #91 on:** April 20, 2024, 02:20:22 PM »

OK, so I scored these rims for a song. Pretty good shape. Tahoe is OK with the old wheels and tires. Rides like a tank, even my boy commented.

JR · « **Reply #92 on:** April 20, 2024, 02:31:54 PM »

Got the tires mounted up. New TPMS sensors, 6oz beads for balance.

Tire machine regulator went bad last time I used it, replacement was fairly easy cept I lost an airline into the guts and had to open it up to retrieve. After the first 2, it started acting up some. Would not grip the wheels (close). Think I got some oil into the valves, but a rag or 2 in the clamps got er done.

It drives much better. I think the overall weight and width means more than I thought. Tires sit just as wide, just 1 inch narrower.

I like how it looks too, but not sure on the chrome lugs, thinking black? Notice anything else?

JR · « **Reply #93 on:** April 20, 2024, 10:07:35 PM »

So far so good. Smoother and quieter on the road. Topped off the tank and it calced to 17mpg, best ever but time will tell. Running about 5psi more than the others since it is narrower.

Spent the afternoon with the youngest at Pick n pull. Got a lot for his truck and I found a seat trim piece for mine and a DIC switch that is supposed to be plug and play.

Flyin6 · « **Reply #94 on:** April 21, 2024, 09:23:27 AM »

Good solid cop car look you have going there...I like it

So, not seeing something else...
Window tint: same as before
Stance: About the same
Front air dam: Did you remove that?
Paint: Looks about the same

Stumper...

JR · « **Reply #95 on:** April 21, 2024, 11:56:15 AM »

Blacked out between the front windows (tint coming), factory option on some and I liked the look.

oklawall · « **Reply #96 on:** April 22, 2024, 06:53:33 AM »

Coming together very nicely

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JR · « **Reply #97 on:** April 22, 2024, 11:14:41 AM »

Thx, nice not having the tpms warning on the dash anymore too.

JR · « **Reply #98 on:** April 23, 2024, 04:56:40 PM »

Pulled the dash panel, painted the new panel plugged in the NTM switch and I have full DIC options now. Paint is close and have to do.

JR · « **Reply #99 on:** April 25, 2024, 12:26:06 PM »

After I retorqued the wheels, I did some weight calculations.

Besides being 1 inch narrower, they are 44lbs lighter than the nitto combo and steel wheels, thats each wheel! 40psi seems about right, wear looks OK and all the little tits are still on the tires.

Balance feels good, guess the 6oz beads were about right. Haven't calced a full tank yet but with the DIC working it shows low 16 average which is 2-3 more than before.