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Bumper to Bumper Radio, the car guys on KTAR, 92.3 FM in Phoenix, AZ, broadcast every Saturday from 11:00 am to noon. On this show, Dave Riccio of Tri-City Transmission in Tempe, AZ talks about the effectiveness of putting denatured alcohol in you fuel tank in order to help pass emissions tests. Also on this show:

• 2002 GMC Yukon with 127,000 miles. There is a hum when driving. Goes away when turning right.
• 1985 Mercedes. Hard time shifting into third gear.
• 1997 Chevrolet Silverado. When driving, the steering wheel does a quick jerk to the side and then works fine.
• 2005 Chevrolet Tahoe. Service Ride Control light came on. Shocks do not appear to be lifting when towing.
• 2002 GMC Sonoma. Water leak in the back. Repaired the problem and now it won't start.
• If you put denatured alcohol in my fuel tank, it will help me pass emissions.
• Where is a good place to sell my father's mechanic tools?
• 2003 Chevrolet Cavalier. Occasionally doesn't start. Can take up to an hour to get started after waiting.
• 2005 Chevrolet Malibu. When the car is in drive, it shakes. In park, there is no problem.

Cars talked about on this show are the 1985 Mercedes, 1997 Chevrolet Silverado, 2005 Chevrolet Tahoe, 2002 GMC Sonoma, 2003 Chevrolet Cavalier, and the 2005 Chevrolet Malibu.