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GM 20880895
Transmission Cooler

1999-2014 GM

Customer Questions & Expert Answers (20)
GM 20880895 Transmission Cooler
GM 20880895 Transmission Cooler
  • Part Description
    Cooler, Transmission Oil; Automatic Transmission Oil Cooler
  • Replaces
    15124639, 25891509, 25877162, 15019344, 15097192, 15015464
  • Manufacturer
    General Motors
Make sure this part fits
$188.54 MSRP: $281.82
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  • Related Parts
  • Product Specifications
  • Vehicle Fitment
  • Customer Questions & Expert Answers
  • Product Specifications

    BrandGenuine GM
    Manufacturer Part Number20880895
    Part DescriptionCooler, Transmission Oil; Automatic Transmission Oil Cooler
    Other NamesAuxiliary Cooler; Cooler; Cooler, Transmission Oil Auxiliary; Cooler, Transmission Oil Cooler
    Item Dimensions44.7 x 12.7 x 36.7 inches
    Item Weight2.30 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces15124639, 25891509, 25877162, 15019344, 15097192, 15015464
    ManufacturerGeneral Motors
    SKU20880895
    WarrantyThis genuine GM part is guaranteed by GM's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65
  • Vehicle Fitment

    Year Make Model Trim Engine
    2002-2014 Cadillac EscaladeBase, Luxury, Platinum, Premium8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
    2003-2014 Cadillac Escalade ESVBase, Luxury, Platinum, Premium8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
    2002-2013 Cadillac Escalade EXTBase, Luxury, Premium8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
    2007-2013 Chevrolet AvalancheBlack Diamond LS, Black Diamond LT, Black Diamond LTZ, LS, LT, LTZ8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
    2002-2006 Chevrolet Avalanche 1500Base, LS, LT, North Face, On Road Edition, WBH, Z66, Z718 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS
    2002-2006 Chevrolet Avalanche 2500Base, LS, LT8 Cyl 8.1 L GAS
    1999-2013 Chevrolet Silverado 1500Base, Hybrid, LS, LT, LTZ, SS, WT, XFE, Z71 Off-Road6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX
    2007 Chevrolet Silverado 1500 ClassicLS, LT, SS, WT6 Cyl 4.3 L GAS, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L GAS
    2005-2006, 2001-2003 Chevrolet Silverado 1500 HDBase, LS, LT8 Cyl 6.0 L GAS
    2007 Chevrolet Silverado 1500 HD ClassicLT8 Cyl 6.0 L GAS
    View More
  • Customer Questions & Expert Answers

    Q:
    Can you help me check if this 20880895 is the right part for my car? Posted by ChevyPartsGiant Specialist
    A:
    Please Select Your Vehicle model to see if part number 20880895 is suitable before ordering.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler for the 4L80-E/4L85-E automatic transmission on Cadillac Escalade EXT? Posted by Customer
    A:
    The first step to replacing the transmission fluid auxiliary cooler on a 4l80-e/4l85-e automatic transmission is to take off the grille assembly. After that, pull off the transmission fluid cooler hoses from the auxiliary cooler and pull out the auxiliary Oil Cooler bolts and push pins. Once that is done, take the auxiliary Oil Cooler out of the vehicle. Attach the auxiliary Oil Cooler to the car with the bolts into the radiator brace, making sure you tighten them to 12 nm or 106 inch lbs. Be sure to put the push pins in place on the radiator brace, connect the Transmission Oil Cooler lines to the auxiliary cooler, and then attach the grille assembly again.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on Cadillac Escalade ESV? Posted by Customer
    A:
    To replace the transmission fluid auxiliary cooler, start by removing the front grill assembly. Put a drain pan under the vehicle and disconnect the Transmission Oil Cooler lines from the auxiliary cooler. Remove the auxiliary oil cooler bolts and push pins and pull the auxiliary oil cooler out of the vehicle. For installation, mount the new auxiliary oil cooler in position and you can install the bolts and push pins to join it with the radiator brace and tighten the bolts 12nm 9 lbft. Attach the Transmission Oil Cooler lines to the auxiliary cooler, and finally, reinstall the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on a 4L60-E/4L65-E on Cadillac Escalade? Posted by Customer
    A:
    You need to start the front grill assembly removal process after placing a drain pan beneath the vehicle. First disconnect the Transmission Oil Cooler lines from the auxiliary cooler unit then remove the auxiliary oil cooler bolts and push pins before you remove it from your vehicle. After fitting installation of the auxiliary oil cooler simply position it in place then install bolts and push pins to the radiator brace while tightening all bolts to 12 nm (9 ft. Lbs.). Reinstall the front grill assembly while you restore the Transmission Oil Cooler lines to their attachment points on the auxiliary cooler unit.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on a 6L50/6L80/6L90 automatic transmission on Cadillac Escalade? Posted by Customer
    A:
    To remove and replace the transmission fluid auxiliary cooler for a 6l50/6l80/6l90 automatic transmission, click to view details. Remove the auxiliary Transmission Oil Cooler bolts, and push pins, disconnect the Transmission Oil Cooler lines from the auxiliary cooler, and take the auxiliary Transmission Oil Cooler off the vehicle. For installation, reposition the auxiliary transmission oil coolers back in its' position and install the bolts and push pins to hold the Transmission Oil Cooler in position to the radiator brace by tightening the bolt to 12 n.m (9 lb ft). Next you need to reconnect the Transmission Oil Cooler lines to the auxiliary cooler and finally reinstall the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler for the 4L80-E/4L85-E automatic transmission on Chevrolet Avalanche 2500? Posted by Customer
    A:
    The first step to replacing the transmission fluid auxiliary cooler on a 4l80-e/4l85-e automatic transmission is to take off the grille assembly. After that, pull off the transmission fluid cooler hoses from the auxiliary cooler and pull out the auxiliary Oil Cooler bolts and push pins. Once that is done, take the auxiliary Oil Cooler out of the vehicle. Attach the auxiliary Oil Cooler to the car with the bolts into the radiator brace, making sure you tighten them to 12 nm or 106 inch lbs. Be sure to put the push pins in place on the radiator brace, connect the Transmission Oil Cooler lines to the auxiliary cooler, and then attach the grille assembly again.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler for the 4L60-E/4L65-E on Chevrolet Silverado 1500? Posted by Customer
    A:
    The replacement process of the Transmission Oil Cooler 4l60-e/4l65-e starts by removing the front grill assembly. To begin the process place a drain pan underneath the vehicle and remove the Transmission Oil Cooler lines from the auxiliary cooler. Before moving forward disconnect the auxiliary oil cooler bolts followed by push pins before extracting the auxiliary oil cooler from the vehicle. Installation requires positioning the auxiliary oil cooler into its normal location followed by bolting it to the radiator brace with push pins while tightening bolts to 12 nm (9 ft. Lbs.). Complete the Transmission Oil Cooler line setup with the auxiliary cooler then install the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on Chevrolet Silverado 3500? Posted by Customer
    A:
    To change transmission fluid auxiliary cooler, remove the front grill assembly and pour a drain pan underneath the vehicle. Separate Transmission Oil Cooler lines from auxiliary cooler, discard auxiliary cooler bolts and push pins before you pull the auxiliary oil cooler out of the car. For installation, return the auxiliary oil cooler to its position and drive the bolts and push pins that attach it to the radiator brace using 12 nm (9 ft. Lbs.) torque. Finally, reconnect transmission line of oil to the auxiliary cooler and reattach the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on a 4L60-E/4L65-E/4L70-E automatic transmission on Chevrolet Silverado 1500? Posted by Customer
    A:
    Replacing the transmission fluid auxiliary cooler on a 4l60-e/4l65-e/4l70-e automatic transmission requires starting by removing the front grill assembly. Position a drain pan underneath the vehicle and remove the Transmission Oil Cooler lines that connect to the Transmission Oil Cooler. First disconnect the Transmission Oil Cooler bolts while pulling out the push pins. After this remove the Transmission Oil Cooler from the vehicle. Place the Transmission Oil Cooler into position first before installing its bolts which match with push pins at the radiator brace. Securely tighten each bolt to 12 nm (9 lb ft). After installing the Transmission Oil Cooler lines complete the installation by putting back the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on an Allison automatic transmission on Chevrolet Suburban 1500? Posted by Customer
    A:
    The first task for an allison automatic transmission transmission fluid auxiliary cooler replacement begins by removing the front grill assembly while using a drain pan underneath the vehicle. You need to disconnect the Transmission Oil Cooler lines from the auxiliary cooler before you can remove this accessory by removing its bolts and push pins. Reposition the auxiliary Transmission Oil Cooler back into position before installing the bolts and push pins to mount it to the radiator brace while tightening bolts to 12 nm (106 inch lbs.). Attaching the Transmission Oil Cooler lines to the auxiliary cooler should then be followed by reinstalling the front grill assembly. Complete the process by checking transmission fluid levels and adding more if needed.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to flush the Transmission Oil Cooler and lines after installing a repaired or replacement transmission on Chevrolet Tahoe? Posted by Customer
    A:
    Leave the oil cooler lines disconnected during installation of the repaired or replacement transmission. The j35944-a Transmission Oil Cooler and line flusher requires 0.6 l (20-21 oz.) of flushing solution which needs to be added before applying 550-700 kpa (80-100 psi) of shop air pressure. Use the discharge hose to connect with the oil cooler return line and attach it to an oil drain container. Install the j35944-a below the vehicle using the hook attachment then join the hose from the j35944-a to the second oil cooler line. Following water valve off positioning on j35944-a you should connect your water hose from the supply and enable water access through the faucet. The j35944-a allows water to flush through its oil cooler lines for ten seconds by setting the valve to on position to drain transmission fluid. Proceed with caution when flushing the cooler lines because blocked materials require diagnosis and repair before you continue. Use the j35944-a off water control to deactivate the water supply then fasten the drainage hose to a covered five-gallon pail. Apply on position to the water valve on j35944-a while pressing the trigger to mix flushing solution with water until vigorous foam appears. Keep the trigger down using the handle clip. The flushing operation combines water with solution for two minutes while connecting the short burst of compressed air to the j35944-a air valve at 3 to 5 second intervals throughout a 15 to 20 second period before releasing the trigger and turning off the water supply. You should disconnect both hoses from their current lines then transfer them to work with the opposite oil cooler line before repeating the flushing process. Zero in the water supply then use air pressure to drain the water from the oil cooler and lines until only clear air emerges from the discharge hose. During the flow check test you need to disconnect both hoses from the oil cooler lines then link the oil cooler feed line to the transmission and the return line to the discharge hose before clamping the discharge hose onto an empty oil drain container. Begin by filling your transmission with automatic transmission fluid and start the engine in park range until it runs for thirty seconds while expecting fluid discharge to reach 1.9 liters (2 quarts). Go to the following step when fluid flow reaches more than 1.9 l (2 quarts). To lower the fluid output below 1.9 l (2 quarts) disconnect the oil cooler feed line at the radiator before using it to connect to the empty oil drain container. Let your vehicle run for 30 seconds while it's in the park position where discharge must reach at least 1.9 l (2 quarts). An insufficient amount of feed flow requires transmission inspection. Check both the return line of the cooler and the cooler itself if inspection reveals sufficient condition. Finish by disconnecting the discharge tube then reestablishing connections between the transmission's feed and return lines and restocking the unit to the recommended fluid amount.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to service the Transmission Oil Cooler for the 4L80-E Automatic Transmission on Chevrolet Tahoe? Posted by Customer
    A:
    Begin servicing the Transmission Oil Cooler using 4l80-e automatic transmission by first removing the two bolts that fasten the auxiliary Oil Cooler bracket to the radiator support removed, and the auxiliary Oil Cooler removed from the radiator support. For install, replace the two bolts that hold the Oil Cooler to the support radiator with a tolerance of 12 nm (9 inches lbs.) and ensure that the guide pin bolt goes into the support hole.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on Chevrolet Silverado 2500? Posted by Customer
    A:
    To change transmission fluid auxiliary cooler, remove the front grill assembly and pour a drain pan underneath the vehicle. Separate Transmission Oil Cooler lines from auxiliary cooler, discard auxiliary cooler bolts and push pins before you pull the auxiliary oil cooler out of the car. For installation, return the auxiliary oil cooler to its position and drive the bolts and push pins that attach it to the radiator brace using 12 nm (9 ft. Lbs.) torque. Finally, reconnect transmission line of oil to the auxiliary cooler and reattach the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on a 4L60-E/4L65-E/4L70-E automatic transmission on Chevrolet Avalanche 1500? Posted by Customer
    A:
    Before changing the transmission fluid Transmission Oil Cooler on a 4l60-e/4l65-e/4l70-e automatic transmission you must remove the front grill assembly and position a drain pan underneath the vehicle. First disconnect the Transmission Oil Cooler lines from the Transmission Oil Cooler and remove its Transmission Oil Cooler bolts with push pins before extraction. Position the Transmission Oil Cooler into its placement location and secure it to the radiator brace with bolts and push pins while tightening the bolts to 12 nm (9 ft. Lbs.). Reinstall the front grill assembly after reattaching the Transmission Oil Cooler lines to the Transmission Oil Cooler.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on the 4L60-E automatic transmission on GMC Yukon XL 1500? Posted by Customer
    A:
    First, you need to take off the two nuts holding the cooler lines to the Transmission Oil Cooler when replacing the auxiliary cooler on the 4l60-e automatic transmission. If your car doesn't have the 4.3l engine, take out the four bolts that hold the auxiliary Transmission Oil Cooler to the radiator support, and if it does, you'll also have to remove the four bolts securing the auxiliary Transmission Oil Cooler to the radiator support. Be sure to put in the four bolts that attach the Transmission Oil Cooler to the radiator support for all engines, and tighten them to 10 nm (89 inch lbs.). Reinstall the grille assembly after the installation, then review the transmission fluid and give it more if required.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on a 4L60-E/4L65-E/4L70-E automatic transmission on GMC Yukon? Posted by Customer
    A:
    Start with front grill assembly removal as the first step for replacing a 4l60-e/4l65-e/4l70-e automatic transmission transmission fluid auxiliary cooler. A drain pan should sit underneath the vehicle before you disconnect the Transmission Oil Cooler lines that attach to the auxiliary cooler. The first step requires separating the auxiliary oil cooler bolts and push pins; afterwards you can remove the component from the vehicle. Installation requires positioning the new auxiliary oil cooler on the radiator brace then bolting and securing it with push pins before tightening the bolts to 12 nm (9 lb ft). You should attach Transmission Oil Cooler lines to the auxiliary cooler before reinstalling the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on a 6L50/6L80/6L90 automatic transmission on GMC Sierra 1500? Posted by Customer
    A:
    The process of replacing the transmission fluid Transmission Oil Cooler in a 6l50/6l80/6l90 automatic transmission starts by removing the front grill assembly. Place a drain pan under the vehicle before you disconnect Transmission Oil Cooler lines from the Transmission Oil Cooler. Remove the Transmission Oil Cooler and its bolts and push pins before you can remove it from the vehicle. Install the new Transmission Oil Cooler by placing it into position and installing its bolts and push pins to the radiator brace following a torque of 12 nm (9 lb ft). Reposition the front grill assembly after connecting the Transmission Oil Cooler lines to the Transmission Oil Cooler.
    Posted by ChevyPartsGiant Specialist
    Q:
    How to replace the Transmission Oil Cooler on the 6L50/6L80/6L90 automatic transmission on GMC Yukon? Posted by Customer
    A:
    To replace the transmission fluid auxiliary cooler on the 6l50/6l80/6l90 automatic transmission, one must remove the front grill assembly. Put the drain pan under the vehicle and remove the Transmission Oil Cooler lines off the Transmission Oil Cooler. Next, you will need to remove the Transmission Oil Cooler bolts and push pins and remove Transmission Oil Cooler from vehicle. To install, position the new Transmission Oil Cooler, and bolt it and secure it with push pins on the radiator brace while tightening the screws to 12 nm (9 lb ft). Attach the Transmission Oil Cooler lines to Transmission Oil Cooler and finally put back the front grill assembly.
    Posted by ChevyPartsGiant Specialist
    Q:
    What is the torque specification for tightening the bolts during installation for the 2001 Chevrolet Suburban 1500? Posted by Customer
    A:
    Tighten them to 12 Nm (9 ft. lbs.).
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Transmission Oil Cooler
    Q:
    What is the first step to replace the transmission fluid auxiliary cooler on a 4L80-E/4L85-E for the 2005 GMC Sierra 3500? Posted by Customer
    A:
    Remove the grille assembly.
    Posted by ChevyPartsGiant Specialist
    See expert answers on similar Transmission Oil Cooler
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OEM GM 20880895, Excellent Performance and Perfect Fitment

To ensure reliability, purchase GM part # 20880895 Transmission Cooler. It is sometimes referred to as GM Transmission Oil Cooler. Choosing OEM parts is the optimal decision for guaranteeing superior quality and perfect performance. These components undergo stringent quality checks and are carefully constructed to comply with GM's factory specifications, ensuring a smooth installation process.

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