What did you do to your GMT today?

[Mike534x]

Fixed the exhaust leak on the Envoy finally! The tick from the front driver side exhaust manifold had been getting louder over the past 2 months, thought it was the lifters but saw the manifold had a gap between the headers that a dime could easily squeeze into....yikes.

Ordered a Dorman 917-142 exhaust manifold clamp, that supposedly fits the front driver side. While the hole for the coolant sensor lined up, the clamp was incompatible. The manifold for the LH6 has a slightly different design from the one used in my Avalanche. There is a bit of a "hump" where it meets the heat shield, this "hump" prevents the clamp from lining up with the screw holes properly causing it to be off about 3/8 to a 1/2". Decided to search again for a fix, but this time searching for a clamp that fits the TB SS, and came across the #KAP108 clamp that fits the 5.3/6.0 (verified to work with the 360/370). Got it today and installed it a few minutes ago. The tick is gone, and it sits flush against the manifold and block. What a difference, and $50 was all it took! Next step is to figure out where the "vibration" noise I'm getting on startup from the truck is coming from.

 

[brianlibby791]

Washed mine yesterday for the first time in over a month.. just got the bed back on the truck on Thursday thanks to the help of @littleblazer .. just had the cross members where the spare was redone and some plating on the outside frame rail channel along with a patch for a cross member starting to head out.

 

[HARDTRAILZ]

Drove it to work

 

[Eric04]

Rust mitigation. Door edges bloomed again. With the youngest starting college this year I need to keep oxidation tamped down as much as I can.

 

[Mounce]

Pulled the tb into the shop and blew out the vent valve and line, has been refusing fuel for a while now. Was gonna check the charcoal canister but couldn't find it... Even dropped the spare. Must be tucked behind one of the tank heat shields. Confirmed bad rear sway links while I was under there.

Then tackled the rear three dome lights, one out and two flickering. Always had issues with connection of the single side lights with your average 194 leds so I pulled the housing and soldered a 5730 board connector to the socket and put boards in both plus replaced the failed board in the main rear light, figure it'll be pretty bright back there at night now and I won't have any more connection issues. Will do the same to any other lights that give me an issue.



Then pulled the Silverado in and topped off the oil and checked fluids and air filter. All was as expected other than the air filter still being clean.

 

[littleblazer]

Win... the oil pressure lol. (the odometer is about 40k off)

 

[DocBrown]

I actually did this a couple of weeks ago and then went on vacation so didn't have time to post this. Anyway, rust on the rear wheel wells of 2007-2013 Sierras and Silverados is a well known issue. I've done a lot of body work and paint over the years but the thought of rebuilding these panels makes me want to take a nap. I found plastic wheel flares that are paintable and look like stock items. They are made by Bushwhacker. I have a spray gun and compressor, the paint is Napa Martin Senour Crossfire base coat and Finish 1 clear coat. I'm very happy with the look. I have stock size tires and didn't want flares that stuck out 5 inches from the body. That looks stupid unless you have tires to go with them.

 

[Blckshdw]

Swapped out the dead EV fan clutch, for the thermal version, and stumbled across something I hadn't seen posted before. I was able to remove the clutch WITHOUT having to remove the fan shroud, and messing with the radiator hose/coolant. Major time saver!

After cracking the clutch nut loose, so I could spin it by hand, I then removed all of the fan blade bolts, and then moved it up against the engine. Disconnected the shroud from the radiator, pushed it back a bit, and disconnected the clutch wiring harness.





Spun the clutch completely off the water pump shaft to get it free. Fan blades stay put on the pump shaft. Lifted the driver's side corner of the shroud a bit, and with some man handling, was able to pull the clutch out through the gap.






Put some anti seize on the threads, reversed the steps and put the new one in. Started it up, and even after the initial roar, the fan was noticeably more audible at idle than previous times I had the hood open. (which has been a LOT lately ) Not loud, but I could tell it was spinning faster than before, so that's a good sign. Hopped in, turned the truck around to back it in the garage, and there was a very slight roar when I'd hit the gas during a 3 point turn.

True test will be the morning commute, and see what my temps are doing. Traffic has been pretty bad this week, so for once, that will be a good thing! lol

 

[littleblazer]

U-Joints on the escalade.

 

[Redbeard]

Replaced the battery. Yesterday she turned over a bit slower than normal so I checked the voltage while cranking and it dropped to 8 1/2 volts when starting
The old battery lasted 3 1/2 years so it was time to replace it. Still on the original alternator at 15 years old and nearly 200k miles.

 

[Blckshdw]

Finally buckled down and dug into why 3 of the red LEDs on my passenger side mirror were dim for the longest time, and now not lighting up at all. Turns out 1 of the solder joints had disconnected, found it by having power applied, and a light touch to one of the LEDs caused all of them to light up as bright as the rest of them. Touched up the joint (melted part of the LED casing ) and it was good to go.

Laid the electrical tape back down to cover up the white PCB, and put everything back together. I'll put them back on the truck in the morning.

 

[wstuckey1]

Finally cut the coolant lines to the rear heater core and spliced then together. A lot easier than I was expecting a while ago.

 

[TollKeeper]

Not a GMT360, but a GMT250. Battery light kept flashing on, with no rhyme or reason to it. Pulled the alternator and battery out (WHAT A PAIN IN THE ASS), and had them both checked at 3 different stores. All checked out fine. Cleaned up the connections, pulled the navigation radio and bluetooth module out, and reinstalled the factory 6cd unit, to see if they are screwing with the BCM, or if my BCM is just failing on me. God I hope its not the BCM.

 

[BrianF]

The C1500 has been run around the acreage the last few days. Moved piles of limbs and deadfall to the burn pile. I then cleaned the box out and she is full of old barbed wire and page wire, ready for a dump run. I may have scratched some of the paint loading this stuff...

 

[Maverick6587]

I've been trying to figure out this very slight misfire feeling coming from the engine, only at idle, for over a year now.

I finally decided to just swap out the MAF, even though it was reading close to 4.2 gr/se.

That engine runs so smooth now that I can't even tell the engine is running!

 

[Mike534x]

Went for gas while shopping for a small road trip this weekend, sitting at the stop light when I noticed this. Hello infamous P0463. Of course this happens after I put a full tank in.

Looks like I'll be driving her around and get the tank as empty as possible, after looking at the cost of the sending unit and the entire fuel pump assembly. I may just go for the whole assembly for peace of mind.

Between the Avalanche refusing to fill at the pump, and now this I think I'm on a pre-winter roll right now.

 

[Maverick6587]

Yikes. Don't buy Delphi. I had to warranty replace mine after about 5 months.

 

[littleblazer]

Just looked at the escalade sitting on jack stands. I suppose you're wondering how the differential/transfer case rebuild went... well it was great. Drove it Saturday night and it was so effing quiet I was amazed. Now the exhaust we welded up where the cats are is tweaked and not even close... so it sits, exhaust less lol.

 

[HARDTRAILZ]

Drove the kids to school in it for Donuts with Dads Day.

 

[DocBrown]

Drove the kids to school in it for Donuts with Dads Day.

You did donuts with the kids, or you ate donuts with the kids? Either way it would have been a lot of fun for them!

 

[Mike534x]

Yikes. Don't buy Delphi. I had to warranty replace mine after about 5 months.

No worries! I bought a Bosch 67508. I did see the Delphi, and saw all the issues people were having with the pump not staying primed. I originally planned on buying a Delco unit but they (5 available last night when added to cart) were gone this morning. Its going to be a fun week when I get back home.

 

[Mooseman]

Bosch actually supplies ACDelco with their pumps.

 

[littleblazer]

My delco had a Bosch sticker on it.

 

[BrianF]

Took the C1500 to town and then to the dump. Managed to unload all that wire.

 

[Mike534x]

Bosch actually supplies ACDelco with their pumps.

Sounds like I made a solid choice! Is there any reason why the AC Delco one is more expensive? I don't understand how there was a $40 difference between the two.

My delco had a Bosch sticker on it.

I'm feeling better about not spending the extra premium in that case. Its a shame the Delphi models are junk, do you guys suggest replacing that medal snap ring at the same time or any suggestions of what I should buy/replace while I'm in there?


So is there an easy way to get the tank down? I saw May03's video for his TB. But then I had a thought, has it ever been attempted by someone to make an access hole above it through the truck, and just JB weld/rivet a latch of some sort?


In other news, I picked up the Avalanche from the shop. They cannot figure out why it keeps refusing to fill up at the gas station (tried several different ones),just shuts them off like its being over filled. The lines are clear, the EVAP canister and solenoid have been replaced and they're telling me the problem lies with the gas tank. Going to take it elsewhere for a second opinion come Monday. Just in the off chance the EVAP canister is a dud, I bought another off Amazon. Both are AC Delco, but I figured what do I have to lose by replacing it again since experience here has shown OEM parts can be defective out of the box.

 

[Mooseman]

Is there any reason why the AC Delco one is more expensive?

Yeah, the ACDelco box!

It has been talked about cutting in the floor but seems like more work than it's worth. If you live in the rust belt, you will probably have to replace the retaining ring.

 

[littleblazer]

Sounds like I made a solid choice! Is there any reason why the AC Delco one is more expensive? I don't understand how there was a $40 difference between the two.



I'm feeling better about not spending the extra premium in that case. Its a shame the Delphi models are junk, do you guys suggest replacing that medal snap ring at the same time or any suggestions of what I should buy/replace while I'm in there?


So is there an easy way to get the tank down? I saw May03's video for his TB. But then I had a thought, has it ever been attempted by someone to make an access hole above it through the truck, and just JB weld/rivet a latch of some sort?


In other news, I picked up the Avalanche from the shop. They cannot figure out why it keeps refusing to fill up at the gas station (tried several different ones),just shuts them off like its being over filled. The lines are clear, the EVAP canister and solenoid have been replaced and they're telling me the problem lies with the gas tank. Going to take it elsewhere for a second opinion come Monday. Just in the off chance the EVAP canister is a dud, I bought another off Amazon. Both are AC Delco, but I figured what do I have to lose by replacing it again since experience here has shown OEM parts can be defective out of the box.

The other thing with cutting the floor is you end up right around where the cross support for the seat track is for the driver... not something I'd want to weaken personally..

 

[Matt]

So is there an easy way to get the tank down?

In a word, no. Actually, taking it out is the easy part. The bitch is getting it back in because you have to get it almost in and then connect the wiring to the pump. I did mine in summer last year and have a scar on my arm from the frame rubbing on it for 45 minutes trying to put that bastard back on.

 

[littleblazer]

The new exhaust on the escalade sounds like freedom. With the rear end links and bushings done the thing tracks like it's on rails. Overall really happy. Just have to tack one hanger on the frame to get the duals supported correctly. Will post a video later.

 

[Mounce]

New radio and front speakers for the TB. Install went easy and it sounds awesome with the new speakers! Had to trim the plastic support in the back for the stock radio but unconcerned with that being its only purpose.

 

[littleblazer]

Dad won't beat on the truck, but it sounds nice.

 

[BrianF]

I did the rebuild on the TBI on the rez rocket C1500. 2.5 hour total time from set up to clean up. Super easy, considering I did most wearing my headlamp. My lighting is not set up in my little shop and it got dark real fast. The original gaskets were in decent shape, as were the injector baskets and O rings. The regulator diaphragm appeared fine but there was a lot of greasy crap on the atmosphere side. What I did find was the three main bolts to clamp the TBI to manifold were not torqued, almost loose.

After install I primed her up, no leaks and she fired up great. Idled great and it responded well after a spirited test drive down the road. Upon return, the cylinder banks were nice and equal with exhaust temperature.

 

[HARDTRAILZ]

Finally got my rear swing arm for bumper fixed n picked up. Had broke off a heim joint and my easy out did not quite do the job on extraction so had my dad friend take a look at his shop. Said I almost had it and he got it with a better extractor and a gave the threads good cleanout. Now Ineed to get a couple new spacers for the bolts that hold the arms and i can finally have the thing back together

 

[Maverick6587]

In my effort to replace all the engine accessories... I replaced one of the last one's yesterday, the MAP sensor.

I would have posted this yesterday but, to my very excited surprise... I needed a little verification time.

I replaced the MAP sensor and immediately gained about 2 mpg! I drove 80 miles home, mostly highway and double-checked the mpg by resetting the average mpg every 15 miles or so (while on a flat area of the highway).

I had no check engine light on for anything, just decided to change it before I had to. Amazon has one for $6 (it's an off-brand, Karpal), so I couldn't resist since the old one was still functional. I'll get an ACDelco version shortly.

 

[BrianF]

Just filled my C1500. 16.5 L/100km. She is definitely off. Reset the trip and should have the new KS by tomorrow or Thursday.

 

[Mike534x]

Got the fuel pump in! Took about 4-5 hours (couldn't get the tank down without dropping the filter neck), all in all I'm never doing that ever again.

 

[Matt]

all in all I'm never doing that ever again.

Me either!! How much fun did you have connecting the wiring to the pump with the tank almost all the way in?

 

[Mike534x]

That was the worst part of it, I could see it being slightly easier with smaller arms and hands. If only the wiring was just a little longer.

 

[northcreek]

I hear you guys, I cut an access door on my old Tahoe(should have been one there from GM) to make the job easier. Don't know if it would work on the 360 though.

 

[Matt]

That was the worst part of it, I could see it being slightly easier with smaller arms and hands. If only the wiring was just a little longer.

Yeah right! I have a scar on my left forearm from when I did mine last summer...a gentle reminder that I never want to do it again.

I hear you guys, I cut an access door on my old Tahoe(should have been one there from GM) to make the job easier. Don't know if it would work on the 360 though.

It would because it's just been done: https://gmtnation.com/forums/thread...-without-dropping-the-tank.20325/#post-588310