How to remove and install an auxiliary oil cooler and Oil Cooler Line on Cadillac DeVille and DTS?

The automatic transaxle fluid is assembled with an auxiliary oil cooler in certain early models. In appearance, this cooler resembles a small radiator and is located at the front of the engine radiator and air conditioning condenser behind the grille. The transaxle fluid's passage is from the transaxle via the transaxle fluid output line to an additional cooler which directly flows into a standard cooler located inside the right-hand tank of the radiator. Place a drain pan under it for any leaking fluid; then separate it by taking off the lower fluid line. Remove upper fluid line only when there are no more droplets of oil dropping down from it. To take away this part, remove the screws that attach on top of the radiator support structure and also detach lower support bracket. Conversely, fix it back in place just as you removed it. Incase of ease in access to lower cooler line at front side of transaxle, remove air filter housing if necessary. In order to catch any liquid that may start to leak out from them, you should put a drain pan under these lines prior to removing them. Unlock plastic collar by unsnapping quick-connect fitting after which quickly pull out clip so as to remove lines completely. Loosen two bolts securing upper cooler line brackets to transaxle afterwards removing those sections entirely from vehicle body's system. Pull out rear connector linking upper transmission cooling pipe with its base unit in consideration of coming away with it first. Disconnect one end of lower cooling pipe among intermediate pieces and finally separate all joints easily while standing on up-down position respectively . The remaining steps during reassembly are shown below: Ensure that all fasteners and fittings are securely tightened. On later models equipped with quick-connects, push upper cooling tube into fitting until click is heard or felt in fingers; afterwards slightly tug on tubing so as to confirm tightness before sliding protective sleeve over connection point itself . Verify your transmission fluids.

Genuine Cadillac Deville Automatic Transmission Oil Cooler Line

AT Oil Cooler Hose

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12 Automatic Transmission Oil Cooler Lines found

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Cadillac Deville Transmission Oil Cooler Upper Pipe Assembly
Part Number: 25606751
$16.63 MSRP: $26.54
You Save: $9.91 (38%)
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Product Specifications
- Other Name: Pipe Assembly, Trans Oil Cooler Upper ; Pipe, Transmission Oil Cooler; Cooler Pipe, Line, Pipe
- Position: Upper
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.9L
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Cadillac Deville Transmission Oil Cooler Lower Hose Assembly
Part Number: 25681002
$28.12 MSRP: $44.26
You Save: $16.14 (37%)
Product Specifications
- Other Name: Hose Assembly, Trans Oil Cooler Lower ; Hose, Transmission Oil Cooler
- Position: Lower
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2003 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, SLS, STS, TOURING 4 DOOR | 8 Cyl 4.6L
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Cadillac Deville Transmission Oil Cooler Upper Hose Assembly
Part Number: 3539658
Product Specifications
- Other Name: Hose Assembly, Trans Oil Cooler Upper ; Hose, Transmission Oil Cooler; Coolant Line, Cooler Line, Lower Hose
- Position: Upper
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Cadillac Deville | 4 DOOR | 8 Cyl 4.9L
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Cadillac Deville Transmission Oil Cooler Lower Hose Assembly
Part Number: 25658709
Product Specifications
- Other Name: Hose Asm,Trans Oil Cooler Lower ; Hose, Transmission Oil Cooler; Cooler Line
- Position: Lower
- Replaces: 3548169, 03548169
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1999 Cadillac Deville | 4 DOOR, DEVILLE | 8 Cyl 4.6L
View related parts
Cadillac Deville Transmission Oil Cooler Lower Pipe Assembly
Part Number: 25615305
Product Specifications
- Other Name: Pipe Assembly, Trans Oil Cooler Lower; Cooler Line, Cooler Pipe, Line, Pipe
- Position: Lower
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.9L
View related parts
Cadillac Deville Transmission Oil Cooler Lower Pipe Assembly
Part Number: 25615306
Product Specifications
- Other Name: Pipe Assembly, Trans Oil Cooler Lower; Pipe
- Position: Lower
- Replaces: 25606300
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.9L
View related parts
Cadillac Deville Transmission Oil Cooler Upper Pipe Assembly
Part Number: 25615308
Product Specifications
- Other Name: Pipe Assembly, Trans Oil Cooler Upper ; Pipe, Transmission Oil Cooler; Cooler Line, Cooler Pipe, Pipe
- Position: Upper
- Replaces: 25535175
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.9L
View related parts
Cadillac Deville Transmission Oil Cooler Upper Hose Assembly
Part Number: 3539657
Product Specifications
- Other Name: Hose Assembly, Trans Oil Cooler Upper ; Hose, Transmission Oil Cooler; Cooler Line, Upper Pipe
- Position: Upper
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Cadillac Deville | 4 DOOR | 8 Cyl 4.9L
View related parts
Cadillac Deville Transmission Oil Cooler Lower Pipe Assembly
Part Number: 25532796
Product Specifications
- Other Name: Pipe Assembly, Trans Oil Cooler Lower; Cooler Line
- Position: Lower
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1990 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, FUNERAL COACH, LIMOUSINE 4 DOOR | 8 Cyl 4.5L
View related parts
Cadillac Deville Transmission Oil Cooler Upper Pipe Assembly
Part Number: 25659161
Product Specifications
- Other Name: Pipe Asm,Trans Oil Cooler Upper ; Pipe, Transmission Oil Cooler; Pipe
- Position: Upper
- Replaces: 25615304, 25625874, 25606749
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1993 Cadillac Deville | 2 DOOR, 4 DOOR, 60 SPECIAL 4 DOOR, CONVERSION, TOURING 4 DOOR | 8 Cyl 4.9L
View related parts
Cadillac Deville Transmission Fluid Cooler Lower Hose
Part Number: 25635583
Product Specifications
- Other Name: Hose,Trans Fluid Cooler Lower
- Position: Lower
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-2000 Cadillac Deville | DEVILLE, HIGH LUXURY, SLS, STS, TOURING 4 DOOR | 8 Cyl 4.6L
View related parts
Cadillac Deville Transmission Fluid Cooler Lower Hose Assembly
Part Number: 25726975
Product Specifications
- Other Name: Hose Assembly, Trans Fluid Cooler Lower ; Hose, Transmission Oil Cooler
- Position: Lower
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2005 Cadillac Deville | DEVILLE, HIGH LUXURY, SEVILLE, STS, TOURING 4 DOOR, TOURING SEDAN | 8 Cyl 4.6L

Cadillac Deville Automatic Transmission Oil Cooler Line Parts Questions & Experts Answers

Transmission Oil Cooler Lower Hose Assembly
25681002
Q: How to remove and install an auxiliary oil cooler and Oil Cooler Line on Cadillac DeVille and DTS?
A: The automatic transaxle fluid is assembled with an auxiliary oil cooler in certain early models. In appearance, this cooler resembles a small radiator and is located at the front of the engine radiator and air conditioning condenser behind the grille. The transaxle fluid's passage is from the transaxle via the transaxle fluid output line to an additional cooler which directly flows into a standard cooler located inside the right-hand tank of the radiator. Place a drain pan under it for any leaking fluid; then separate it by taking off the lower fluid line. Remove upper fluid line only when there are no more droplets of oil dropping down from it. To take away this part, remove the screws that attach on top of the radiator support structure and also detach lower support bracket. Conversely, fix it back in place just as you removed it. Incase of ease in access to lower cooler line at front side of transaxle, remove air filter housing if necessary. In order to catch any liquid that may start to leak out from them, you should put a drain pan under these lines prior to removing them. Unlock plastic collar by unsnapping quick-connect fitting after which quickly pull out clip so as to remove lines completely. Loosen two bolts securing upper cooler line brackets to transaxle afterwards removing those sections entirely from vehicle body's system. Pull out rear connector linking upper transmission cooling pipe with its base unit in consideration of coming away with it first. Disconnect one end of lower cooling pipe among intermediate pieces and finally separate all joints easily while standing on up-down position respectively . The remaining steps during reassembly are shown below: Ensure that all fasteners and fittings are securely tightened. On later models equipped with quick-connects, push upper cooling tube into fitting until click is heard or felt in fingers; afterwards slightly tug on tubing so as to confirm tightness before sliding protective sleeve over connection point itself . Verify your transmission fluids.

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