The tail light wiring harness in the cargo area is not protected very well. As a result it may become damaged due to normal wear a tear. This damage can causing some or all of the rear lights to stop working.
Resources for the Repair and Maintenance of your 2007 GMC Savana 1500
2007 GMC Savana 1500
2007 GMC Savana 1500 Problems
Various electrical components under the front carpet/rubber mat may become damaged if excess water is used to clean the rear cargo area.
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The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
Extended life coolant may become contaminated and require cooling system service before the recommended 100,000 miles.
Our technicians recommend flushing the brake fluid every 60,000 miles. Brake fluid that is dirty may cause problems in the brake system.