What size radiator comes with the tow package?


Asked by Aug 08, 2016 at 05:45 PM about the 2005 Chevrolet Silverado 1500 LS Crew Cab 2WD

Question type: Maintenance & Repair

I have a 2005 Silverado 1500 Crew Cab with the tow package.  My wife had an accident in the car a while back and the next time I towed our 24 ft camper trailer the engine seemed to constantly run higher than normal running temperature (215 to 220 vs ~205 normal) and went up to 235 and above forcing me to pull over and let it cool when climbing steep, long mountain grades.  I'm trying to figure out if I had a high capacity radiator with the tow package but the body shop put in a standard radiator.  I measured the one in there and it's approximately 1 inch thick, I see radiator sites show a 1.25 inch radiator available.

3 Answers

Tom Demyan

Not sure, but I would assume the biggest radiator. The parts catalogs spec out radiators with or without an Engine oil cooler and trans cooler. I hope the auto body shop used the correct one. Standard core is 28.25" long and the larger one is 34"....rockauto.com. if yours is the smaller one, measure to see if you have room to put the bigger one in. I would upgrade it regardless since you are having temp issues.


This is a question. We have a truck like yours, and have had problems pulling up mountains with a lighter camper (4K lbs) Do you know what your axle ratio is? Impressive that you have been able to pull 24 ft camper. We also have installed trans cooler, did not help. Thinking of changing rear axle to see if that would help. Any advise would be appreciated before we spend more money. Sweet riding truck that is paid for makes it hard to spend $$$ for a new one. Thanks for any advice.


Thanks for the reply. I have the crew cab (4 door) with the trailer package which I believe includes the 3.73 rear axle. Some radiator on line sites say a 1.25 inch thick radiator is available for this vehicle which I think was also included with the trailer package but AC delco site only lists one radiator for this vehicle which is about. 1 inch thick. If a 25 percent thicker radiator provides close to 25 percent better heat dissipation that's a big improvement. Maybe ill try talking to a local radiator shop and see what they say. By th way I climbed a 5000 ft mountain again with the trailer, when the temp gauge got to 3/4 mark (before the COOLANT HOT warning would announce) I would stop and keep the engine idling, open the hood and it would cool back to normal in 3-5 min. I would start up again and pull over again when it got up to 3/4 on the temp gauge. Had to stop 7 times to get to the top but doesn't appear to have hurt the truck at all, just added an hour to the trip.

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