How to replace the Transmission Oil Cooler Hose on GMC Sierra 3500?

The replacement of transmission fluid cooler hose/pipe requires front grille removal as the first step. The next step requires detachment of the auxiliary transmission fluid cooler lines from both the auxiliary Oil Cooler and the transmission fluid cooler lines from the Radiator. The next step is to elevate and support the vehicle after which you should take out the engine protection shield. First disconnect the Oil Cooler lines from the transmission before you take the oil lines to remove them from the vehicle. Begin with the vehicle installation by inserting the transmission Oil Cooler lines followed by fitting the cooling lines to the transmission. Start by replacing the engine protection shield while lowering the vehicle and then establish connections between the transmission fluid cooler lines at the Radiator and the auxiliary Oil Cooler. Finally, reinstall the front grille.

OEM GMC Sierra 3500 Transmission Oil Cooler Hose

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3 Transmission Oil Cooler Hoses found

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GMC Sierra 3500 Inlet Pipe, Upper Part Number: 20835125
$72.98 MSRP: $125.34
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Product Specifications
- Other Name: Pipe Assembly-Transmission Fluid Cooler Upper; Outlet Pipe; Pipe, Transmission Oil Cooler
- Position: Upper
- Replaces: 20759971, 21998956
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006 GMC Sierra 3500 | SL, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL
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GMC Sierra 3500 Outlet Pipe, Upper Part Number: 15767601
$79.06 MSRP: $126.63
You Save: $47.57 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pipe Assembly-Transmission Fluid Cooler Upper; Pipe, Transmission Oil Cooler
- Position: Upper
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2003 GMC Sierra 3500 | Base, SL, SLE, SLT | 8 Cyl 6.6 L DIESEL
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GMC Sierra 3500 Outlet Pipe, Upper Part Number: 15170219
$57.88 MSRP: $139.55
You Save: $81.67 (59%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Pipe Assembly-Transmission Fluid Cooler Upper; Pipe, Transmission Oil Cooler
- Position: Upper
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 GMC Sierra 3500 | Base, SLE, SLT, WT | 8 Cyl 6.6 L DIESEL

GMC Sierra 3500 Transmission Oil Cooler Hose

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GMC Sierra 3500 Transmission Oil Cooler Hose Parts and Q&A

Outlet Pipe, Upper
15170219
Q: How to replace the Transmission Oil Cooler Hose on GMC Sierra 3500?
A:
The replacement of transmission fluid cooler hose/pipe requires front grille removal as the first step. The next step requires detachment of the auxiliary transmission fluid cooler lines from both the auxiliary Oil Cooler and the transmission fluid cooler lines from the Radiator. The next step is to elevate and support the vehicle after which you should take out the engine protection shield. First disconnect the Oil Cooler lines from the transmission before you take the oil lines to remove them from the vehicle. Begin with the vehicle installation by inserting the transmission Oil Cooler lines followed by fitting the cooling lines to the transmission. Start by replacing the engine protection shield while lowering the vehicle and then establish connections between the transmission fluid cooler lines at the Radiator and the auxiliary Oil Cooler. Finally, reinstall the front grille.