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The check engine light came on in my 03 Yukon. We took it to an auto parts store and they did not give me the code but said it was a vacuum leak, probably from the gas cap. I checked the cap (it was fine), and the code went away. We drove about 40 miles, then parked the truck for about an...

No I can not see any names for a lowering kit underneath. Based on the quality of the work and how hard it hits bumps, I am sure it was done in the cheapest possible way. I would not be surprised if the coil springs were just hacksawed down to drop the vehicle.

We bought an 03 yukon and the previous owner lowered the vehicle about three inches. In order for me to return it to stock height, do I just need to find some coil springs in a salvage yard, and put regular shocks on the vehicle. I do not mind the vehicle being lowered, except it seems to take...

Lucas I tried it in my wife's 03 yukon and when I run it I get 1 mile per gallon improvement. I'm not really using it for the fuel economy, more for the long term durability of the engine. I have talked to several older mechanics, and they believe in the product and its contribution to the...