Hi Angel, thank you for reaching out. Yes. This item fits the 2003 Chevrolet Suburban 1500 with a 5.3-liter engine. You can use this link to order the part and take advantage of our low price for this item: https://www.carparts.com/radiator/liland/lil2370aa?can=CPAP3648_CSQA_20230806 I hope this helps. Enjoy shopping.

Hi Test Light, This item has both the transmission and engine oil cooler, which are similar to the original.

Hi, You can check the 2 links below to see the correct radiator for your vehicle and engine application. Since you have not provided the exact engine size of your truck, the first link is for the 6.6 liter engine and the 2nd link is for the 6.0 liter engine. https://www.carparts.com/search?q=Radiator&vehicle[cylinders]=8&vehicle[liter]=6%2E6&vehicle[submodel]=WT&vehicle[model]=Silverado_2500_HD&vehicle[make]=Chevrolet&vehicle[year]=2012&filters[universal]=false (this is for the 6.6 Liter engine) https://www.carparts.com/search?q=radiator&itemperpage=15&vehicle[cylinders]=8&vehicle[liter]=6%2E0&vehicle[submodel]=WT&vehicle[model]=Silverado_2500_HD&vehicle[make]=Chevrolet&vehicle[year]=2012 (this is for the 6.0 Liter engine)

Hi Roger, This has transmission cooler lines. To verify fitment to your vehicle please follow the steps below. On the homepage, please enter your application, simply select your vehicle’s year, make, model, sub-model, and engine size and click “Go.” Once your application is selected, type the name of the part you need on search box on the top portion and press enter. Once the part shows up on your screen, you’ll see a “Guaranteed to Fit, Direct fit” note/badge if the part will fit, and we recommend that you also double-check your vehicle fit details as well as the vehicle fitment information table on the product page.

Hi, Yes, Liland is American made.