What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[PPV12HOE]

View attachment 255379 View attachment 255380

Thatsa no gouda....

 

[PPV12HOE]

Just replaced my ISS and started on the Dorman Y/coolant lines.

Is there some trick to get the line off from the firewall? I just watched a video and he got it off pretty quickly but, mine will not budge. Is there a tool to help the removal ?

Yes there are tools... they look like this...

 

[PPV12HOE]

Just finished the Dorman heater hose/y fittings.

That f*****g sucked, lost just about all my coolant out of the motor. What's the secret to this swap? I just watched a video and he lost maybe a quart. Mine pissed out the entire time what a F*****G ***** that was, now I'll spend the rest of the afternoon cleaning up coolant running down my driveway.

What's the best way to re-start with little to no coolant?

He probably hooked the system up to vacuum while he did it... thats the only way not to lose all the coolant...

 

[Rocket Man]

Just finished the Dorman heater hose/y fittings.

That f*****g sucked, lost just about all my coolant out of the motor. What's the secret to this swap? I just watched a video and he lost maybe a quart. Mine pissed out the entire time what a F*****G ***** that was, now I'll spend the rest of the afternoon cleaning up coolant running down my driveway.

What's the best way to re-start with little to no coolant?

The procedure I’ve always followed to refill the cooling system after a complete drain is the one in the service manual, it’s never let me down.


Filling Procedure

Notice: The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing engine damage.

1. Install the lower radiator hose to the radiator.
2. Using the J 38185 , reposition the lower radiator hose clamp.

Notice: Refer to Fastener Notice .

1. If the left and right engine block coolant drain plugs were removed, perform the following:

1. Apply pipe sealer to the drain plugs.
2. Install the drain plugs.

Tighten the drain plugs to 60 N.m (44 lb ft).

1. Install the engine block coolant heater, if equipped. Refer to Coolant Heater Replacement (LH6, LY2, LMG, LY5, and LY6) (See: Engine\Engine Block Heater\Service and Repair\Coolant Heater Replacement (LH6, LY2, LMG, LY5, and LY6))Coolant Heater Replacement (L76, L92) () .
2. Lower the vehicle.

Important: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.

1. Slowly fill the cooling system with a 50/50 coolant mixture. Refer to Approximate Fluid Capacities .
2. Install the coolant pressure cap.
3. Start the engine.
4. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature. Engine should reach an operating temperature of 90°C (194°F) and the upper radiator hose should be HOT.
5. Allow the engine to idle for 3 minutes.
6. Shut the engine OFF.
7. Allow the engine to cool.
8. Top off the coolant as necessary.
9. Inspect the concentration of the engine coolant using the J 26568 .
10. Rinse away any excess coolant from the engine and the engine compartment.

 

[89Suburban]

Ok everything is out. Time for the duct tape and silicone.

 

[Kee Fuller]

Just replaced my ISS and started on the Dorman Y/coolant lines.

Is there some trick to get the line off from the firewall? I just watched a video and he got it off pretty quickly but, mine will not budge. Is there a tool to help the removal ?

Pain in the ass to remove. Done it twice

 

[89Suburban]

Measurements

 

[Fless]

Measurements


View attachment 255409 View attachment 255410 View attachment 255411

Caution! Those are probably metric holes.

 

[992dr]

He probably hooked the system up to vacuum while he did it... thats the only way not to lose all the coolant...

Gotcha, I'll have to look up how to do that for dare I say, next time haha.

The procedure I’ve always followed to refill the cooling system after a complete drain is the one in the service manual, it’s never let me down.


Filling Procedure

Notice: The procedure below must be followed. Improper coolant level could result in a low or high coolant level condition, causing engine damage.

1. Install the lower radiator hose to the radiator.
2. Using the J 38185 , reposition the lower radiator hose clamp.

Notice: Refer to Fastener Notice .

1. If the left and right engine block coolant drain plugs were removed, perform the following:

1. Apply pipe sealer to the drain plugs.
2. Install the drain plugs.

Tighten the drain plugs to 60 N.m (44 lb ft).

1. Install the engine block coolant heater, if equipped. Refer to Coolant Heater Replacement (LH6, LY2, LMG, LY5, and LY6) (See: Engine\Engine Block Heater\Service and Repair\Coolant Heater Replacement (LH6, LY2, LMG, LY5, and LY6))Coolant Heater Replacement (L76, L92) () .
2. Lower the vehicle.

Important: Use a 50/50 mixture of DEX-COOL antifreeze and clean, drinkable water.

1. Slowly fill the cooling system with a 50/50 coolant mixture. Refer to Approximate Fluid Capacities .
2. Install the coolant pressure cap.
3. Start the engine.
4. Run the engine at 2,000-2,500 RPM until the engine reaches normal operating temperature. Engine should reach an operating temperature of 90°C (194°F) and the upper radiator hose should be HOT.
5. Allow the engine to idle for 3 minutes.
6. Shut the engine OFF.
7. Allow the engine to cool.
8. Top off the coolant as necessary.
9. Inspect the concentration of the engine coolant using the J 26568 .
10. Rinse away any excess coolant from the engine and the engine compartment.

Thank You, I'll go over it again tomorrow while I'm installing my windshield washer fluid tank, yay.

Pain in the ass to remove. Done it twice

Twice, oh g-d. At least you were prepared for round two haha.


I also replaced my drivers door pin, that was fun. Its nice to be able open and close my door without having to put my ass into it haha.

 

[89Suburban]

Ok now that the wiper motor is unplugged and removed the rear glass won’t unlatch. I knew the wiring was related between the 2 parts. Does anybody have a wiring schematic for the rear tailgate?


Of course I did not realize this until everything was put back together. ****...