How to service and repair the 4L80-E Automatic Transmission Oil Cooler on GMC C3500?

You should start the service by removing the Oil Cooler line from the Transmission Oil Cooler. Then, take off the four bolts that bond the auxiliary Transmission Oil Cooler brackets to the radiator support and also take off the four bolts and nuts that connect the auxiliary Transmission Oil Cooler to the brackets. To install, fix the auxiliary Transmission Oil Cooler to the brackets using the supplied bolts and nuts, tighten them to 6 nm (53 inch lbs.). After that, put in the four bolts that attach the Transmission Oil Cooler brackets to the radiator support and tighten them to no more than 10 nm (89 inch lbs.). The cooler line from the engine should then be joined to the Transmission Oil Cooler.

OEM GMC C3500 Transmission Oil Cooler

Trans Oil Cooler

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GMC C3500 Transmission Cooler Part Number: 89022535
$186.49 MSRP: $278.77
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Product Specifications
- Other Name: Cooler, Engine Oil Cooler; Cooler, Transmission Oil Cooler
- Replaces: 15995536
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L CNG, 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Transmission Cooler Part Number: 89022577
Product Specifications
- Other Name: Cooler, Engine Oil Cooler; Cooler, Transmission Oil Cooler
- Replaces: 15995535
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2000 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Transmission Cooler Part Number: 15990593
Product Specifications
- Other Name: Cooler, Transmission Oil Cooler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 GMC C3500 | Sierra SL, Sierra SLE, Sierra SLT | 8 Cyl 5.7 L GAS, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS
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GMC C3500 Transmission Cooler Part Number: 15974686
Product Specifications
- Other Name: Cooler, Transmission Oil Cooler
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 GMC C3500 | Sierra, Sierra SLE, Sierra SLX | 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L DIESEL, 8 Cyl 6.5 L DIESEL, 8 Cyl 7.4 L GAS

GMC C3500 Transmission Oil Cooler

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GMC C3500 Transmission Oil Cooler Parts Questions & Experts Answers

Transmission Cooler
89022535
Q: How to service and repair the 4L80-E Automatic Transmission Oil Cooler on GMC C3500?
A:
You should start the service by removing the Oil Cooler line from the Transmission Oil Cooler. Then, take off the four bolts that bond the auxiliary Transmission Oil Cooler brackets to the radiator support and also take off the four bolts and nuts that connect the auxiliary Transmission Oil Cooler to the brackets. To install, fix the auxiliary Transmission Oil Cooler to the brackets using the supplied bolts and nuts, tighten them to 6 nm (53 inch lbs.). After that, put in the four bolts that attach the Transmission Oil Cooler brackets to the radiator support and tighten them to no more than 10 nm (89 inch lbs.). The cooler line from the engine should then be joined to the Transmission Oil Cooler.