Tansmission Pan Removal

[zrt600]

After researching this topic here, looking at mine on a 01 GMC Serria 2500, I have these questions.

 

1. The pan bolts at the rear. There seams to be very little access to get at them with the trans mount in the way. How do you get access?

 

2. The heat sheild on the passenger side leaves very little acccess to the side bolts. The sheild is also mounted to the exhaust, but how do you remove the sheild?

 

Thanks

[Zembonez]

With the proper tools (1/4 inch swivel sockets and extensions) you should be able to get to them. Worst case, you can unbolt the rear trans mount and jack up the rear of the trans a couple of inches. Just support it on a stand until you are done.

 

Good luck with your repair.

[jrrod2004]

GM's way to crack the Transmission Pan off: (Assuming that you have a 2WD equipped with the 6.0 or the 8.1)

 

 

 

Service Information

 

2001 GMC Truck GMC C Sierra - 2WD | Sierra, Silverado, Suburban, Tahoe, Yukon (VIN C/K) Service Manual | Document ID: 659790 Automatic Transmission Fluid and Filter Replacement

Removal Procedure

Caution: When the transmission is at operating temperatures, take necessary precautions when removing the drain plug, to avoid being burned by draining fluid.

 

 

1. 
   
2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
   
3. Remove the catalytic converter. Refer to Catalytic Converter Replacement .
   
4. Place a drain pan under the transmission oil pan.
   
5. Remove the oil pan drain plug, if equipped.
   
6. If necessary, remove the bolts and position aside the range selector cable bracket for clearance while lowering the pan. It is not necessary to remove the cable from the lever or bracket.
   
7. Remove the oil pan bolts from the front and sides of the pan only.
   
8. Loosen the rear oil pan bolts approximately 4 turns.
   
9. Lightly tap the oil pan with a rubber mallet in order to loosen the pan to allow the fluid to drain.
   
   
10. Remove the remaining oil pan bolts.
    
    
11. Remove the oil pan and the gasket.
    
    
12. Grasp firmly while pulling down with a twisting motion in order to remove the filter.
    
    
13. Remove the filter seal. The filter seal may be stuck in the pump. If necessary, carefully use pliers or another suitable tool to remove the seal.
    
14. Discard the seal.
    
15. Inspect the fluid color.
    
16. Inspect the filter. Pry the metal crimping away from the top of the filter and pull apart. The filter may contain the following evidence for root cause diagnosis:

    • Clutch material

     

     

    • Bronze slivers indicating bushing wear

     

     

    • Steel particles

     

    
    

17. Clean the transmission case and the oil pan gasket surfaces with solvent, and air dry. You must remove all traces of the old gasket material.
    

Installation Procedure

 

1. 
   
2. Coat the new filter seal with automatic transmission fluid.
   
3. Install the new filter seal into the transmission case. Tap the seal into place using a suitable size socket.
   
4. Install the new filter into the case.
   
   
5. Install the oil pan and a new gasket.Notice: Refer to Fastener Notice in the Preface section.
    
    
   
   
6. Install the oil pan bolts.Tighten
   Tighten the oil pan to transmission case bolts alternately and evenly to 11 N·m (97 lb in).
   
7. If previously removed, install the range selector cable bracket and bolts.Tighten
   Tighten the bolts to 25 N·m (18 lb ft).
   
8. Apply a small amount of sealant GM P/N 12346004 to the threads of the oil pan drain plug, if equipped.
   
9. Install the oil pan drain plug, if equipped.Tighten
   Tighten the oil pan drain plug to 18 N·m (13 lb ft).
   
10. Install the catalytic converter. Refer to Catalytic Converter Replacement .
    
11. Lower the vehicle.
    
12. Fill the transmission to the proper level with DEXRON® VI transmission fluid. Refer to Transmission Fluid Check and Fluid Capacity Specifications .
    
13. Check the COLD fluid level reading for initial fill only.
    
14. Inspect the oil pan gasket for leaks.
    

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

I am assuming that you either have the 6.0 or the 8.1...

 

 

 

 

 

 

 

 

 

Service Information

 

2001 GMC Truck GMC C Sierra - 2WD | Sierra, Silverado, Suburban, Tahoe, Yukon (VIN C/K) Service Manual | Document ID: 658702 Catalytic Converter Replacement (6.0 L and 8.1 L Engines)

Removal Procedure

Caution: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

 

Caution: Always wear protective goggles and gloves when removing exhaust parts as falling rust and sharp edges from worn exhaust components could result in serious personal injury.

 

 

1. 
   
    
   
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
   
3. Remove the engine shield bolts and shield, if necessary.
   
    
   
4. Remove the oil pan skid plate bolts and plate, if necessary.
   
5. Remove the muffler. Refer to Muffler Replacement .
   
    
   
6. Disconnect the connector position assurance (CPA) retainers.
   
7. Disconnect the oxygen sensor electrical connectors (1, 2).
   
    
   
8. Remove the left exhaust manifold pipe nuts.
   
    
   
9. Remove the catalytic converter.
   
10. Slide the catalytic converter hanger out of the exhaust pipe hanger bracket.
    
     
    
11. If equipped with a 6.0 L engine, with regular production option (RPO) Y91, remove the catalytic converter.
    
12. Slide the catalytic converter hanger out of the exhaust pipe hanger bracket.
    
     
    
13. Remove the oxygen sensors if the catalytic converter is to be replaced.
    

Installation Procedure

Notice: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to prevent overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.

 

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

 

 

1. 
    
   

© 2008 General Motors Corporation. All rights reserved.

[jrrod2004]

 

1. 
   
    
   
2. If the catalytic converter was replaced, perform the following:

   1.1. Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensors.

    

    

   1.2. Install the oxygen sensors.

    

   Tighten
   Tighten the oxygen sensors to 42 N·m (31 lb ft).
    
    
   
    
   

3. If equipped with a 6.0 L engine, with RPO Y91, install a NEW exhaust seal to the exhaust manifold.
   
4. Install the catalytic converter.Slide the catalytic converter hanger into the exhaust pipe hanger bracket.
    
    
   
    
   
5. Install a NEW exhaust seal to the exhaust manifold.
   
6. Install the catalytic converter.Slide the catalytic converter hanger into the exhaust pipe hanger bracket.
    
    
   
    
   
7. Install the left exhaust manifold pipe nuts.Tighten
   Tighten the exhaust manifold pipe nuts to 50 N·m (39 lb ft).
    
    
   
    
   
8. Connect the oxygen sensor electrical connectors (1, 2).
   
9. Connect the CPA retainers.
   
10. Install the muffler. Refer to Muffler Replacement .
    
     
    
11. Install the oil pan skid plate and bolts, if necessary.Tighten
    Tighten the oil pan skid plate bolts to 20 N·m (15 lb ft).
     
     
    
     
    
12. Install the engine shield and bolts, if necessary.Tighten
    Tighten the engine shield bolts to 20 N·m (15 lb ft).
     
    
13. Lower the vehicle.
    

 

[zrt600]

Thanks guys for your help. It is a 4X 4 also. I can see this is going to be a bit*h either way. My wifes 2000 Envoy was a no brainer, not this one.

 

Thanks again.