My "Check Engine Light" was on, I went to Jiffy Lube first and they totally misdiagnosed my problem, however, to be fair, Jiffy Lube DID recommend me take it to Horace. Once at Horace, they did a different diagnosis. They explained what I needed and gave me time to think about it. Since I've had the work done, my truck runs like a dream. To this point, I do believe they accurately diagnosed the problem. I believe they were honest and accurate in their diagnosis. Thank you.