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Transmission Cooler > 1999 > GMC > Sierra

Derale Transmission Coolers for the 1999 GMC Sierra

Derale Transmission Coolers

ratingratingratingratingrating (35 reviews)


Code:   D12903

Retail:$64.42

Price:$39.95


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Shipping Weight: 3 pounds

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Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy - 1999 GMC Sierra

15-1/4" Wide x 7-1/2" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your GMC Sierra's transmission.

Features:

  • Improves functioning and overall performance of transmission
  • Extends life of transmission and prolongs period between necessary fluid changes
  • Cuts down on heat-related failures
  • Agitates fluid with built-in, embossed turbulators for more efficient cooling
  • Constructed of durable, lightweight aluminum
    • Thermal-conductive metal provides excellent transfer of heat
  • Includes:
    • High-temperature, OEM spec hose with stainless steel clamps
    • Nylon mounting rods
    • Insta-dapt radiator adapter
  • Recommended for mid-size cars, trucks and SUVs
  • Imported


Specs:

  • Inlets: 11/32" hose barb
  • Overall dimensions: 15-1/4" wide x 7-1/2" tall x 3/4" deep
  • Core width: 12-1/4"
  • Distance between inlets: 6-1/4"
  • 1-Year warranty


Note: The Derale Insta-dapt radiator adapter fits most GMC Sierras with 5/16" transmission lines, but not all. In some cases, additional fittings or alteration of the OEM lines or hoses may be required for installation.


Perhaps the simplest type of heat exchanger, the tube-fin effectively cools a variety of automotive systems. The concept is simple: Fluid cools as it travels through the core by transferring heat out to the fins. The fins then provide the surface area necessary for sufficient heat exchange to take place, allowing the heat pulled from the fluid to dissipate into the surrounding air. Quick, easy and effective.

Dimensions

Replaces HH41013



12903 Derale Dyno-Cool Aluminum Tube and Fin Cooler with Installation Kit






Customer Reviews

Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy - D12903

Average Customer Rating:  ratingratingratingratingrating4.6 out of 5 stars   (35 Customer Reviews)

15-1/4" Wide x 7-1/2" tall x 3/4" deep, reliable, all-aluminum tube-and-fin cooler extends the life and improves overall functioning of your vehicle's transmission.


- D12903

ratingratingratingratingrating by: Jeff F06/29/2011

Is this review helpful?


Just got it in the mail the other day. Fast shipping, never have had an issue. Having it installed right now. Feels like it is well constructed and should do the job. We shall see what happens. 18179





Comments

What is the rated towing weight for a 1999 Honda CR-V? Does a trannie cooler install fairly easily on the Honda CR-Vs? What is the most effective mounting location for the finned cooler? How does the addition of a trannie cooler effect the volume of fluid and fluid level reading on the dip stick? Thanks for your time and expertise.

comment by: Robb B. - 10/22/2013


2225

The towing capacity question is a loaded one. For that, I would refer back to the owners manual. It can vary depending on engine, transmission, drive configuration and more. Furthermore, Honda has some very specific guidelines regarding towing so it's best to defer to them. Installing a trans cooler on a full size truck can be easier because of the extra space, but it is not particularly difficult on any vehicle. We actually have a video of a cooler being installed on a 2006 C-V. We remove the front bumper cover for the video, but you may find you do not need to. (See link). The most effective location will be in front of both the radiator and the A/C condenser. As you move behind each cooling device, the efficiency diminishes. We put ours in front of everything on the 2006 in the video. For fluid capacity, plan on an extra 1/2 quart. Depending on cooler size and construction, it will vary some, but 1/2 qt. is a good rule of thumb.

Patrick B - 10/23/2013




- D12903

ratingratingratingratingrating by: Scott06/27/2014

Is this review helpful?


All parts were as they were stated. I have not towed my boat for any distance yet to see how well it lowers the temp of my transmission. Idid have to buy some more because I came up about 6" to short. 138046




Reviews for other Dyno-Cool Tube-Fin Transmission Cooler Kit :

- D12906

ratingratingratingratingrating by: Dustin C02/03/2012

Is this review helpful?


Ive got a 1999 4runner that had the unfortunate luck of having the integrated transmission cooler line rupture inside my radiator. needless to say, the transmission didnt agree very well with having engine coolant running through it and finally died out on me. I bought this transmission cooler to isolate the transmission and the engine cooling systems. The cooler arrived a day ahead of schedule, which is always a bonus. I didnt rate it at 5 stars because I havent had a chance to install it yet and see how it performs, but judging by the reviews that I have read so far, the customer service provided and the prompt delivery, I would say that this transmission cooler will keep my truck running for a good long while. Everything pictured arrived in the box and I have no doubt that it will perform as expected. I will definitely recommend this product and this company to my friends! 30988






- D12906

ratingratingratingratingrating by: Dave C12/10/2012

Is this review helpful?


Very easy install, absolutely no leaks anywhere in the system after putting it into service. I did have to get additional hose for the install due to the location I chose for the cooler (personal preference). I centered it on the bumper side of the radiator to provide the best air flow. Remember to get a quart of transmission fluid to accomodate the larger system volume after the install. I took my grill off to provide the most room for putting the cooler in rather than trying to wedge it between the radiator and grill, made install the nylon fasteners through the radiator and cooler much easier. Should last for many years. 61081






- D12906

ratingratingratingratingrating by: Lee I.06/05/2014

Is this review helpful?


This product is great and installation was not bad at all. Only issue I had was that the GM radiator adaptor should come with this unit when you purchase it for a GM truck. Not as an add-on. Thought I could get it at GM but no go. I Had to work with hoses over 30 min to get them over the fittings even with trans. fluid on the hose and male fitting. So far it looks like trans temp has dropped 30 dg. 134485






- D12901

ratingratingratingratingrating by: John S.05/19/2011

Is this review helpful?


I installed this cooler on a 2001 odyessey to help prevent a future trans failure.It was delivered quickly when promised,came with everything I needed for installation and had no problems.Overall a good product I would recommend this to anyone. I am also very happy with etrailer.coms service and selection and would definitly use them again. 14807






- D12906

ratingratingratingratingrating by: Jeremy Troesh06/21/2011

Is this review helpful?


The transmission cooler, along with all the other products I ordered from etrailer was an excellent buy. they arrived on time and in excellent condition. The best benefit of ordering from etrailer is the superior customer service. I was even able to talk directly with one of their installers when I had a question. 17556






- D12904

ratingratingratingratingrating by: Donald01/30/2013

Is this review helpful?


Easy install. But hoses need to be longer. I had to go to napa to purchase an extra 3 ft. The hose clamps that were included were limited to the amount of tension that were put on them. They would tighten to x amount then just spin. I had to purchase extra hose clamps that actually tightened. Impressed overall. 64593






- D12906

ratingratingratingratingrating by: Robin S.10/10/2013

Is this review helpful?


This is a great product and it is priced better than anywhere else that I could find. The shipping was extremely fast and the product was packaged well - I know it will help in my towing on my Tahoe 103267






- D12904

ratingratingratingratingrating by: Dylan07/18/2011

Is this review helpful?


Very fast shipping. Everything was there and in pretty decent condition. Would have been perfect, but some fins were bent, though it could have been the delivery company. Definitely recommend 19614






- D12906

ratingratingratingratingrating by: Dan L04/08/2014

Is this review helpful?


Wanted to give my Honda better ability to handle a tow. this baby does the job. Transmission definitely cooler operation since the install. The install was simple and straight forward. 124351






- D12901

ratingratingratingratingrating by: Alan Raybourn08/07/2012

Is this review helpful?


I received the trans cooler yesterday afternoon and installed it on my 1996 chevrolet astro this morning in less than an hour, now I can pull my travel trailer with my van. 50838






- D12901

ratingratingratingratingrating by: Bob Z06/12/2014

Is this review helpful?


This is an excellent price and appears to have more cooling capacity over the OEM cooler. Installed very easily. This was used on an 08 HONDA PILOT 135385






- D12906

ratingratingratingratingrating by: wv hiker06/12/2014

Is this review helpful?


Installed on a 2002 chevy tracker with ease. very well made and all parts provided were well thought out for the installation. 135278






- D12906

ratingratingratingratingrating by: Allan11/10/2012

Is this review helpful?


Got my Tranny Cooler and basically did what they showed on the on line video and had it completted in one afternoon. 59191






- D12906

ratingratingratingratingrating by: Brandon04/18/2012

Is this review helpful?


I installed it in my 2007 Honda Odyssey and it works great. It took about an hour and a half to install. 37669






- D12906

ratingratingratingratingrating by: Kenneth W04/14/2014

Is this review helpful?


Easy to follow instructions. You will need to remove the front clip to install. Nothing too difficult. 124916






- D12906

ratingratingratingratingrating by: Potato Pirate04/14/2011

Is this review helpful?


Great for the price. Works well on my Honda Pilot and provides more cooling then the OEM cooler. 11785






- D12901

ratingratingratingratingrating by: Andy C.12/05/2011

Is this review helpful?


Great service. Part I ordered was as described on the website and was shipped out quickly. 27689






- D12901

ratingratingratingratingrating by: Oliver S05/01/2014

Is this review helpful?


Two cars, two transmissions radiators, very good product from etrailer.com Thank you ! 128472






- D12906

ratingratingratingratingrating by: Ron05/13/2014

Is this review helpful?


Works great thanks mine got a hole in it and i replaced it with this one. 130315






- D12906

ratingratingratingratingrating by: Potatopirate05/07/2011

Is this review helpful?


Very inexpensive and does the job well with everything I needed included. 13054






- D12906

ratingratingratingratingrating by: jesus r08/01/2013

Is this review helpful?


Good reliable cooler and really good shipping and tracking! 92799






- D12901

ratingratingratingratingrating by: Aly07/22/2011

Is this review helpful?


This is a great after market to substitute for the original. 19879






- D12904

ratingratingratingratingrating by: Victor01/19/2012

Is this review helpful?


Fast shipping, good price!!! Thank you 29941






- D12901

ratingratingratingratingrating by: jimmy m10/24/2011

Is this review helpful?


quick shipping & grt price 26027






- D12906

ratingratingratingratingrating by: Jim R.06/01/2014

Is this review helpful?


Works as described. 133626






- D12906

ratingratingratingratingrating by: denman12/17/2012

Is this review helpful?


see previous review 61610






- D12906

ratingratingratingratingrating by: Dave08/18/2012

Is this review helpful?


Good Product 52237






- D12907

ratingratingratingratingrating by: Kevin K.08/09/2012

Is this review helpful?


Nice 51072




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Ask the Experts about this Derale Transmission Coolers
Expert Answers about Derale Dyno-Cool Tube-Fin Transmission Cooler Kit - Class III - Economy - D12903                                            Do you have a question about this Transmission Coolers?


  • Do I Need to Identify Transmission Cooler lines to Run an Aftermarket Cooler In-Line with Factory
  • You will need to determine the flow of the transmission fluid in order to install the aftermarket cooler in-line with the factory. The fluid needs to travel from the transmission, to the factory cooler, to the aftermarket cooler, then back to the transmission. One of the fittings on your transmission should be marked RETURN. Trace this line back to the factory cooler. Disconnect this line from the factory cooler, and reconnect it to which ever end of the aftermarket cooler you choose...
    view full answer...

  • How To Find the Transmission Cooler Return Line From Radiator on a 1993 Chevy C2500
  • The best way to determine which line on a transmission cooler is the return line from the radiator is to use the following procedure: 1. Start engine while engine is cold 2. Place transmission shift lever in drive for no more than 10 seconds 3. Place in Park, stop engine, and remove keys 4. Identify the oil return line by feeling both oil lines. The coolest line is the oil return line. On the aftermarket transmission cooler the ports are not input specific or output specific. It...
    view full answer...

  • Transmission Cooler Recommendation for a 2007 Chevy Suburban Towing a 5,900 Pound Travel Trailer
  • Adding weight distribution will help to divide the gross trailer weight more equally to all the axles of the Suburban and trailer, but all the weight will still be there. While weight distribution is a good idea for a trailer this size, the best solution, and most economical, is to add a transmission cooler. I recommend the Derale Dyno-Cool Tube-Fin Transmission Cooler Kit, # D12903. It is rated for up to 6,000 pounds gross trailer weight and will help to keep the transmission fluid...
    view full answer...

  • Recommend Derale Aluminum Tube Fin Transmission Cooler For a Snowmobile
  • We do have all aluminum coolers available, they are the 6000 series coolers from Derale. Checkout the Derale Dyno-Cool Tube-Fin, part # D12901, which is an all aluminum cooler. The # D12901 cooler measures 13 inches wide, 5 inches tall, and is 3/4 inches thick. You will need to measure to see if you will have room on your snowmobile to mount the cooler. We do not have an aluminum tube fin cooler as small as the Derale # D13212 cooler that you referenced. For other aluminum coolers...
    view full answer...

  • Towing Capacity and Transmission Cooler Installation on a 1999 Honda CR-V
  • I was able to find on the Honda website the specs for your 1999 Honda CR-V. The towing capacity is listed as 1000-lbs. Transmission coolers come in a variety of types and sizes. These items are not vehicle-specific, so you can install the largest cooler for which you have space to mount it. The best location within the engine compartment is in front of the air conditioner condenser as this placement provides maximum air flow and hence best cooling. I have linked two articles that provide...
    view full answer...

  • Transmission Cooler for a 2008 Ford F-150 4.2 Liter Towing 5,000 Pound 5th Wheel Trailer
  • The most popular cooler for towing capacities of around 5,000 pounds is # D13504. This cooler is 11 inches wide, 12 inches tall, and 7/8 inches deep. Provided you have space for a cooler, and on a 2008 Ford F-150 you surely do, this cooler will work great for you. I have linked a video review of the cooler, the instructions, and a help article on coolers.
    view full answer...

  • How to Determine the Transmission Cooler Return Lin on a 1999 For F-150
  • The easiest way to determine the return line on your 1999 Ford F-150 transmission is to start the truck, shift into drive but do not go anywhere. After about 15 seconds or so put the truck back in park and apply the emergency brake. Turn off the truck. Out of the 2 hoses attached to the transmission, one should be warmer than the other. The one that is cooler is the return line. It may sound a little too easy but it works.
    view full answer...


GMC Sierra Accessories


Info for this part was:


Photos by:
Theodore B

Updated by:
DeAnne T

Expert Research:
Patrick B

Expert Research:
Michael H

Expert Research:
Adam R

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